Geology of the Canary Islands

Teide stratovolcano on Tenerife Volcanic cones on Lanzarote Pahoehoe lava flow on El Hierro Caldera de Taburiente on La Palma

The geology of the Canary Islands is dominated by volcanoes and volcanic rock. The Canary Islands are a group of volcanic islands in the North Atlantic Ocean, near the coast of Northwest Africa. The main islands are Lanzarote, Fuerteventura, Gran Canaria, Tenerife, La Gomera, La Palma, and El Hierro.[Note 1] There are also some minor islands and islets. The Canary Islands are on the African tectonic plate but they are far from the plate's edges; this controls the type of volcanic activity, known as intraplate volcanism, that has formed the islands.[2]

The Canary Islands, and some associated underwater volcanic mountains on the ocean floor, are in the Canary Volcanic Province. The current long period of volcanic activity in this province started about 70 million years ago.[3] For many millions of years, all the volcanic eruptions in the province occurred on the ocean floor but, since 20 million years ago, enough lava has accumulated on the ocean floor at several particular locations in the province to form each of the Canarian islands in turn.

Volcanic activity has occurred during the Holocene Epoch (the last 11,700 years) on all of the main islands except La Gomera.[4] The Canary Islands region is still volcanically active. The most recent volcanic eruption on land occurred in 2021[5] and the most recent underwater eruption was in 2011–2012.[3]

## Islands

[edit]

Canary Islands (ringed in red) in relation to Africa Map of the Canary Islands

The Canary Islands are a 450 km-long (280 mi), east-west aligned archipelago of volcanic islands in the eastern part of the North Atlantic Ocean, 100–500 km (60–310 mi) off the coast of Northwest Africa.[6] Geologically, there are seven main islands in the Canary Islands; from east to west they are Lanzarote, Fuerteventura, Gran Canaria, Tenerife, La Gomera, La Palma, and El Hierro.[Note 2]

Close to the coasts of the main islands, there are some minor islands and named islets including:

* near Lanzarote: the Chinijo Archipelago (La Graciosa, Alegranza, Montaña Clara, Roque del Este, and Roque del Oeste);
* near Fuerteventura: Lobos;
* near Tenerife: Roques de Anaga, Roque de Garachico;
* near Gran Canaria: Roque Melenara;
* near La Gomera: El Roquillo;
* near La Palma: Roque de Santo Domingo, Roque de las Tabaidas, Roque del Guincho;
* near El Hierro: Roques de Salmor;

There are also numerous unnamed islets. The minor islands and islets are formed of rocks that have composition and history similar to the rocks of their neighbouring main island.

The seven main Canary Islands originated as separate submarine seamount volcanoes on the ocean floor, which is 1,000–4,000 m (3,000–13,000 ft) deep in the Canarian region.

Lanzarote and Fuerteventura are separated by an 11 km-wide (7 mi), 40 m-deep (130 ft) ocean strait. Both islands are parts of a volcanic ridge called the Canary Ridge. These two islands have sometimes been a single island in the past when worldwide sea level was lower than its present level.[7]

The volume of volcanic rock that has built up the Canary Islands to thousands of metres above the ocean floor is about 124,600 km3 (29,900 cu mi); 96% of this lava is hidden below sea level and only 4% (4,940 km3 (1,190 cu mi)) is above sea level.[8] The western islands have more of their volume (7%) above sea level than do the eastern islands (2%).[8]

## Regional setting

[edit]

The Canary Islands are built upon one of the oldest regions of Earth's oceanic crust (175–147 Ma), part of the slow-moving African Plate, in the continental rise section of Northwest Africa's passive continental margin.[9][10]

The rocks under and in the Canary Islands are a record of multiple periods of volcanic activity:

(1) Starting about 180 Ma (million years ago), the oceanic crust of the North Atlantic Ocean was formed; it consists of igneous rocks (plutonic rocks overlain by volcanic rocks) that were gradually covered by layers of sedimentary rocks. The igneous oceanic crust was formed by seafloor spreading at the divergent plate boundary between the North American and African plates, as a result of the breakup of the supercontinent Pangaea; in the Canary Islands region, this occurred in the Jurassic. North America and Northwest Africa separated while the Atlantic Ocean grew between them. Although this volcanic activity formed the ocean floor on which the Canary Islands were later formed, this seafloor spreading type of volcanic activity was not involved in the formation of the islands.[11]

(2) Starting about 70 Ma, volcanic activity in the Canary Volcanic Province has occurred at numerous seamounts across an area of the ocean floor up to 400 km (250 mi) north of the Canary Islands. The northernmost of this group of seamounts, Lars seamount (about 380 km (240 mi) north of Lanzarote), has been dated to 68 Ma. The seamounts are progressively younger southwestwards towards Lanzarote. The Savage Islands (about 200 km (120 mi) north of the Canary Islands) developed from seamounts into islands at about 30 Ma, followed by each of the Canary Islands in turn since 20 Ma. Volcanic activity in the Canary Volcanic Province has continued to the present day.[12]

The oceanic lithosphere is about 60 km (40 mi) thick at the central Canary Islands and about 100 km (60 mi) thick at the western islands.[13]

## Island development stages

[edit]

See also: Evolution of Hawaiian volcanoes

Erosion has cut deep canyons (known locally as barrancos) into the lava piles of some of the islands, as in this example at Barranco de Tirajana, Gran Canaria.

Volcanic oceanic islands, such as the Canary Islands and the Hawaiian Islands, that form in deep parts of the oceans follow a sequence of several development stages. The sequence of stages was originally recognised, during the 1940s, in the Hawaiian Islands, where eight stages were defined.[14] In the Hawaiian volcanic island chain and some other volcanic island chains, some of the later stages occur due to subsidence of the island as seafloor spreading moves the island away from the focus of volcanic activity. In contrast, the Canary Islands have not undergone significant subsidence; therefore the sequence has been adapted in the Canary Islands to the following stages:[15][16][17]

1. submarine (seamount) stage (El Hijo de Tenerife seamount)
2. shield-building stage (La Palma, El Hierro)
3. erosional stage (La Gomera)
4. post-erosional (or rejuvenation) stage (Tenerife, Gran Canaria, Lanzarote, Fuerteventura)

The Canary Islands differ from some other volcanic oceanic islands, such as the Hawaiian Islands: for example, the Canary Islands have stratovolcanoes, compression structures and a lack of significant subsidence.[16]

The seven main Canary Islands originated as separate submarine seamount volcanoes on the floor of the Atlantic Ocean (although Tenerife and La Gomera are close enough to each other for their seamounts to overlap as they grew;[18] the distance between Lanzarote and Fuerteventura was also small enough for some of their shield volcanoes to overlap as they grew, forming a single volcanic ridge[19]). Each seamount, built up by the eruption of many lava flows, eventually became an island. Subaerial volcanic eruptions continued on each island.

The stage of development of each island is shown in its current topography. The five younger islands, in the western and central sections of the island group, are higher and more rugged. The volcanic edifice of Tenerife, which is capped by Teide stratovolcano, rises about 7,500 m (24,600 ft) above the ocean floor (about 3,780 m (12,400 ft) underwater and 3,715 m (12,188 ft) above sea level);[Note 3] measured from the ocean floor, it is the tallest volcanic edifice on Earth, except for a few in Hawaii.[21][22][23] The two oldest, eastern islands of Fuerteventura and Lanzarote, where fissure eruptions have dominated in the rejuvenation stage, have more subdued topography with heights below 1,000 m (3,300 ft).

## Age

[edit]

From about 70 Ma to about 20 Ma, all the volcanic activity in the Canary Islands region occurred as underwater eruptions and the islands did not yet exist. Eventually, enough lava accumulated at particular locations to form each island of the Canary Islands archipelago. The age of the first underwater eruptions differs from island to island; for example, the first underwater eruptions at La Gomera were at more than 12 Ma but at La Palma they were at 4 Ma. Seamount stage rocks are not exposed on Lanzarote, Tenerife, Gran Canaria and El Hierro, which has hampered or prevented dating of the earliest underwater volcanic activity at these islands.

The age of the oldest subaerially-erupted lavas on each island decreases from east to west along the island chain: Lanzarote-Fuerteventura (20.2 Ma),[Note 4] Gran Canaria (14.6 Ma), Tenerife (11.9 Ma), La Gomera (9.4 Ma), La Palma (1.7 Ma) and El Hierro (1.1 Ma).[25][2]

The age of the youngest sedimentary rocks under each of the islands also decreases from east to west along the island chain.[26]

## Rock types

[edit]

Basaltic lava rock with holes (vesicles) where bubbles of gas were trapped within the lava when it was molten, from Lanzarote (length: 6 cm (2.4 in))

Volcanic rock types found on the Canary Islands are typical of oceanic islands. The volcanic rocks include alkali basalts, basanites, phonolites, trachytes, nephelinites, trachyandesites, tephrites and rhyolites.[16][4] There are lava flows as well as deposits of pyroclastic material, such as tuff (made of volcanic ash or lapilli).

Outcrops of plutonic rocks (for example, syenites, gabbros and pyroxenites) that formed deep below the surface occur on Fuerteventura,[27] La Gomera and La Palma. Apart from some islands of Cape Verde (another volcanic island group in the Atlantic Ocean, about 1,400 km (870 mi) south-west of the Canary Islands), Fuerteventura is the only oceanic island known to have outcrops of carbonatite.[28]

## Volcanic landforms

[edit]

"Los Órganos", coastal cliff of Miocene columnar-jointed phonolite and trachyte (partially eroded lava domes), La Gomera[29][30]

Examples of the following types of volcanic landforms occur in the Canary Islands: shield volcano, stratovolcano, collapse caldera, erosion caldera, cinder cone, coulee, tuff cone, tuff ring, maar, lava flow, lava flow field, dyke, volcanic plug,[31] sill, cone sheet, lava delta, solidified lava lake, and lava tube.

## Origins of volcanism

[edit]

Several hypotheses have been proposed to explain the volcanism of the Canary Islands.[32] Two hypotheses have received the most attention from geologists:[33]

1. The volcanism is related to crustal fractures extending from the Atlas Mountains of Morocco.
2. The volcanism is caused by the African Plate moving slowly over a hotspot in the Earth's mantle.

Currently, a hotspot (the Canary hotspot) is the explanation accepted by most geologists who study the Canary Islands.[34][35] A relatively hot mantle plume associated with this hotspot is thought to be rising through the mantle under La Palma and El Hierro.[36]

Evidence in favour of a hotspot origin for Canarian volcanism includes the age progression in the arcuate Canary Volcanic Province occurring in the same direction and at the same rate as in the neighbouring arcuate Madeira Volcanic Province (about 450 km (280 mi) farther north). This is consistent with the African Plate rotating anticlockwise at about 12 mm (0.47 in) per year.[37] Also, seismic tomography has revealed the existence of a region of hot rock extending from the surface, down through the oceanic lithosphere to a depth of at least 1,000 km (620 mi) in the upper mantle.[38] Another line of evidence is the east-to-west decrease in age of the youngest sedimentary rocks under each island.[39]

## Volcanic eruption distribution

[edit]

According to the Smithsonian Institution's Global Volcanism Program, as of 2023[update], seventy-five confirmed volcanic eruptions have occurred in the Canary Islands in the Holocene Epoch (the last 11,700 years of Earth's geological history).[40] Sixteen of these eruptions have occurred since the later stages of the Spanish conquest of the Canary Islands c. 1480; Spanish written eyewitness reports exist for these eruptions and they are therefore known as the historical eruptions of the Canary Islands.[40][41] In the last 500 years, a volcanic eruption has occurred somewhere in the island chain, on average, every 30 to 35 years.[42] For each island, however, the time gap or repose time between historical eruptions has been highly variable (for example, 26 to 237 years for La Palma; 1 to 212 years for Tenerife);[40] this large variability is one of the reasons why reliable prediction of future eruptions at the volcanoes of the Canary Islands is unlikely.[43]

Volcanic eruptions in the Canary Islands (according to the Smithsonian Institution's Global Volcanism Program, as of 2023[update])  Island | Holocene
(last 11,700 years) | Historical
(since c. 1480) | Historical eruption dates | Notes | Ref.

|
|
|
|
|

Lanzarote  | 4  | 2  | 1730–1736, 1824  |  | [44]
Fuerteventura  | 0  | 0  | ——  | No dated confirmed Holocene eruptions but the freshness of some lavas and some volcanic landforms suggests that they may have been formed in the Holocene  | [45]
Gran Canaria  | 11  | 0  | ——  |  | [46]
Tenerife  | 42  | 5  | 1492, 1704–1705, 1706, 1798, 1909  |  | [47]
La Gomera  | 0  | 0  | ——  |  | [42]
La Palma  | 14  | 8  | 1481(±11), 1585, 1646, 1677–1678, 1712, 1949, 1971, 2021  |  | [48]
El Hierro  | 4  | 1  | 2011–2012  |  | [49]

### Tenerife and La Palma comparison

[edit]

During the last 10,000 years, Tenerife and La Palma have been the two most volcanically active Canary islands. The bar chart compares the number of volcanic eruptions (vertical y-axis) at different stages during this time span (horizontal x-axis).[50]

10,000–8,001

8,000–6,001

6,000–4,001

4,000–2,001

2,000–551

550–0

* Tenerife
* La Palma

## Lanzarote

[edit]

Remains of the Famara shield volcano's pile of lava flows at the northern tip of Lanzarote (cliff height: 200–300 m (660–980 ft))

Volcanic activity at Lanzarote started during the Oligocene Epoch at 28 Ma.[51] For about the first 12 million years, the lava pile of a submarine seamount built up from the 2,500 m-deep (8,200 ft) ocean floor.[52] Then, in the Miocene Epoch, from 15.6 Ma to 12 Ma, the Los Ajaches subaerial shield volcano grew as an island on top of the seamount, in an area corresponding to present-day southern Lanzarote.[53] Between 10.2 Ma and 3.8 Ma, volcanic activity was focussed about 35 km (22 mi) to the northeast, forming a second shield volcanic island called Famara.[54] Between Los Ajaches and Famara volcanoes, a central volcanic edifice was also active from 6.6 to 6.1 Ma.[55] The edifices gradually merged to form a single island, Lanzarote, at about 4 Ma.[56] From 3.9 Ma to 2.7 Ma, volcanic activity paused and the island was eroded.[57] Today, although the lavas of Los Ajaches volcano are now mostly covered by calcrete,[58] the eroded remains of the two shield volcanoes are preserved in southern and northern Lanzarote respectively, with small outcrops of the central edifice occurring between them. At about 2.7 Ma, in the late Pliocene Epoch, the rejuvenation stage began. It produced much less lava than the earlier shield stage, mainly at the Montaña Roja and Montaña Bermeja volcanoes in southern Lanzarote.[57] Then, throughout the subsequent Pleistocene and Holocene epochs, the rejuvenation volcanism has continued and has been dominated by strombolian-style eruptions of lava from sets of volcanic cones aligned along numerous NE-SW fissures in the central part of Lanzarote.[59] Geologically recent examples of Lanzarote's rejuvenation stage volcanism include eruptions at Montaña Corona (about 21,000 years ago), Timanfaya (1730–1736) and Tao/Nuevo del Fuego/Tinguatón (1824).[60][61][62]

Timanfaya, Lanzarote

The Timanfaya eruption (1730–1736) erupted more than one billion cubic metres (1 km3 (0.24 cu mi)) of lava, and a large volume of pyroclastic tephra, from more than 30 volcanic vents along a 14 km-long (9 mi) fissure in western Lanzarote. The lava flows cover one quarter of the island (an area of about 225 km2 (87 sq mi)) with some of the flows reaching about 50 m (160 ft) in thickness. It is the largest historical eruption in the Canary Islands, and the third largest subaerial fissure eruption of basaltic lava on Earth in the last 1,100 years.[63][64][65][66][67][68]

Almost all the volcanic rocks of Lanzarote are basaltic.[69]

## Fuerteventura

[edit]

Basal Complex near Ajuy, Fuerteventura (cliff height is approximately 15 metres (49 ft))

Fuerteventura is situated on Mesozoic oceanic crust, about 70 km (40 mi) from the edge of the African continental shelf and about 100 km (60 mi) from the African mainland, making it the Canarian island closest to Africa.[70]

Basaltic lava flows of the Jandia Edifice at Pico de Zarza and Pico de la Palma, Fuerteventura

Due to its old age, the oceanic crust at Fuerteventura is relatively rigid and this has prevented subsidence and allowed weathering and erosion to expose deep levels of the island's geological structure.[71]

The two main rock sequences of Fuerteventura are (1) a lower, older (Cretaceous to early Miocene) sequence of sedimentary, plutonic and submarine seamount volcanic rocks with intrusive dykes, often called the "Basal Complex", which is unconformably overlain by (2) a younger sequence of Miocene, Pliocene and Quaternary subaerial volcanic rocks.

The oldest rocks of Fuerteventura are a set of mafic plutonic rocks, marine sedimentary rocks and volcanic rocks, which are intruded by igneous dykes.[72] The sedimentary rocks of the Basal Complex were deposited on the ocean floor and represent the uppermost part of the oceanic crust that was uplifted and incorporated into the volcanic edifice during volcanic activity. The Mesozoic sedimentary rocks are mostly metamorphosed, and they are steeply tilted. The tilting occurred in the mid-Cretaceous and was probably caused by the uplift of Africa.[73][74] Fuerteventura's first alkaline magmatism intruded plutonic rocks into the oceanic crust at about 70 Ma.[16] This signifies a change to a hotspot environment.[16] A submarine seamount started to form on the ocean floor during the Eocene Epoch, at about 39 Ma.[16] The igneous rocks of the Basal Complex probably represent the seamount stage of Fuerteventura’s volcanic history, exposed due to uplift and erosion.[75]

In the early Miocene, volcanic activity transitioned from submarine to subaerial while the volcanic edifice was gradually built up above sea level. Fuerteventura has the oldest subaerial volcanic rocks of the Canary Islands, which have been dated to 20.6 Ma.[76] There were three main shield volcanoes built on the seamount base (from north to south): the Northern Edifice, the Central Edifice and the Jandia Edifice.[77][78] The central shield volcano is the oldest, built mostly from 22 to 18 Ma but with a later phase from 17.5 to 13 Ma. The southern shield volcano formed from 21 to 14 Ma. The northern shield volcano was built mainly from 17 to 12 Ma.[79] These shield volcanoes erupted mostly basaltic and trachybasaltic lava flows.[80]

Lower Pliocene fossiliferous marine sedimentary rocks at Ajuy, Fuerteventura

In the late Miocene (from about 11.5 Ma), there was a pause in volcanic activity (the erosional stage). Minor volcanic eruptions resumed in the Pliocene, at about 5.1 Ma (the rejuvenation stage) and they continued sporadically into the Quaternary, with basaltic lava flows dominating again.[81]

The most recent volcanic eruption on Fuerteventura that has been dated occurred 134,000 years ago in the middle Pleistocene.[82] Some undated volcanic cones in northern Fuerteventura may have formed more recently.[83] According to the Smithsonian Institution's Global Volcanism Program, there have been no dated confirmed Holocene eruptions but the freshness of some lavas and some volcanic landforms suggests that they may have been formed in the Holocene.[84]

Weathering, erosion and sedimentation during the Pliocene and Quaternary formed coastal and shallow-sea sedimentary rocks that were eventually covered by younger aeolian sediments, alluvial fan deposits and palaeosols.[85]

## Gran Canaria

[edit]

After early Miocene submarine volcanic eruptions created a seamount, subaerial volcanic activity at Gran Canaria occurred in three phases: shield stage (middle- and late-Miocene, 14.5 to 8.5 Ma), erosional stage (late Miocene, 8.5 to 5.3 Ma) and rejuvenated stage (Pliocene to Quaternary, 5.3 Ma to present).[86]

The shield stage started with an early phase of eruptions of basaltic lava flows, from 14.5 to 14.1 Ma, which built the main subaerial shield volcanic edifice that forms three quarters of the subaerial volume of Gran Canaria.[87] At least three shield volcanoes were active during this stage of island development and their lava flows gradually merged together into a single large landform.[88] This was followed by a later phase, from 14.1 to 8.5 Ma, of explosive volcanic eruptions of differentiated felsic lavas (phonolites, trachytes and rhyolites) with many pyroclastic flows (that deposited ignimbrites). In central Gran Canaria, Tejeda caldera and a cone sheet swarm were formed in this phase.[89]

Remains of Roque Nublo stratovolcano, Gran Canaria

From 8.5 to 5.3 Ma, in the erosional stage, there was minimal volcanic activity. Erosion occurred along with deposition of alluvial sediments on the island and deposition of submarine turbidite sediments offshore.[90]

In the rejuvenation stage, from 5.3 Ma to present, volcanic activity has occurred in three phases. The first phase, from 5.3 to 2.7 Ma, was dominated by the formation of Roque Nublo stratovolcano in the central part of Gran Canaria. This produced lava flows, ignimbrites and debris avalanche deposits.[91] The second phase (3.5 to 1.5 Ma) had strombolian-style effusive eruptions of lava flows along a northwest-southeast trending volcanic rift.[92] The current phase, from 1.3 Ma to the present, has featured scattered phreatomagmatic and strombolian eruptions of very alkaline lavas.[93] The most recent volcanic eruption on Gran Canaria occurred about 2,000 years ago at Bandama crater, in the northeast part of the island.[94][95]

Sand dunes at Maspalomas, Gran Canaria

Sand dunes, with a total volume of 18 million cubic metres (24×10 ~~^~~ 6 cu yd), cover an area of 3.6 km2 (1.4 sq mi) of the Maspalomas cuspate foreland on Gran Canaria's south coast.[96] Aeolian landforms found in this dune field include barchan dunes and dune ridges (transverse dunes). The dunes are made of sand grains and pebbles. The average thickness of the dunes is 5–10 m (16–33 ft) but some dunes reach 20 m (66 ft) thick.[97] In a few areas, the underlying deltaic sediments are exposed.[98] The sand that has built the dunes has been moved about 2 or 3 km (1 or 2 mi) by water waves and wind from the sediment source area (an offshore submarine shelf at Playa del Inglés). Since the 1960s, urbanisation has affected the local winds and this has caused the gradual reduction in volume and area of the dune field because sediment erosion now exceeds sediment deposition.[99] The dunes had long been thought to have formed during the last several thousand years[100] but a 2021 study found evidence supporting a hypothesis that the dunes formed less than 300 years ago, as a consequence of a tsunami generated by the 1755 Lisbon earthquake.[101][102]

## Tenerife

[edit]

Satellite image of Tenerife: Teide-Pico Viejo Volcanic Complex in Las Cañadas caldera (centre), Teno massif (north-west, centre-left) and Anaga massif (north-east, top right)

Tenerife's subaerial shield stage of island development started at about 11.9 Ma in the late Miocene Epoch.[103] First, a shield volcano called Tenerife central shield volcano grew as an island at what is now the central part of Tenerife. This central shield volcano was active from 11.9 to 8.9 Ma.[104] Most of this central shield volcano's lavas have been covered by younger lavas from younger volcanoes; some small patches of the central shield volcano's lavas are now preserved as the Roque del Conde massif in the centre of the island. Then, in northwestern Tenerife, a second shield volcano (Teno shield volcano) formed from 6.4 to 5.1 Ma; its remains are the Teno massif.[105] Then, from 4.9 to 3.9 Ma, a third shield volcano (Anaga shield volcano) was active in the northeastern part of Tenerife; the remains of this volcano are the Anaga massif.[106] The lavas of these three shield volcanoes gradually formed a combined volcanic edifice that accounts for 90% of Tenerife's current volume.[107]

Pico Viejo (left) and Teide (right) in Las Cañadas caldera

The rejuvenation stage of Tenerife (after a long erosive gap in activity at the centre of Tenerife) started at about 4 Ma and continues to the present day. Between 4.0 and 0.2 Ma, a large stratovolcano (Las Cañadas volcano) formed, centred in the central part of Tenerife. Las Cañadas volcano covered some parts of the three older shield volcanoes.[108] This volcanic activity at the centre of Tenerife has included cycles of basaltic lavas (e.g. basanites and tephrites) alternating with significant amounts of magmatically differentiated (more felsic and more alkaline) lavas (e.g. tephri-phonolites and phonolites).[109] Central volcanic activity has been accompanied, since 3 Ma, by mostly basaltic fissure eruptions at a three-armed Y-shaped radial rift zone system that has northwest, northeast and south rift zones.[110] Between about 200,000 and 170,000 years ago, Las Cañadas volcano collapsed, forming Las Cañadas caldera.[111] The nature of this collapse has been studied by many geologists during the last two centuries[112] but the caldera's origin is still controversial because rocks that would provide decisive evidence about the nature and timing of some key events are not preserved or not exposed. Suggested causes of Las Cañadas volcano's collapse are landslide, or explosive volcanic eruption, or a combination of both.[113] In this 16 km × 20 km (9.9 mi × 12.4 mi) caldera, since about 170,000 years ago, two related stratovolcanoes have formed: Teide (most of its eruptions occurring before 30,000 years ago) and its younger, smaller, western, close neighbour Pico Viejo (most of its eruptions occurring between 27,000 and 14,600 years ago).[114][115] Both of these stratovolcanoes are still active. Together with some satellite vents, they form the Teide-Pico Viejo Volcanic Complex.[116][117][a][b] Most of Tenerife's Holocene eruptions have occurred at the radial rift zones rather than at the two stratovolcanoes.

During the Holocene Epoch, Tenerife has had 42 confirmed volcanic eruptions, which is more than any other Canary island.[118] Tenerife is currently at the point in its geological development where the effects of constructive volcanic eruption and destructive erosion are roughly balanced.[119]

## La Gomera

[edit]

Lower Pliocene dark-coloured lava flows and light-coloured tephra at Playa de Santiago on the south coast of La Gomera[120] (cliff height: 50 m (160 ft))

The seamount base (also known as the Submarine Edifice) of La Gomera was built by volcanic eruptions during the Miocene Epoch. The precise age range of this submarine volcanic activity is uncertain. Dating done in the early 1970s suggested that submarine volcanic eruptions occurred from 20 Ma to 15 Ma, followed by an erosion gap of 5 million years. The reliability of these dates has been questioned; dating done in the 2000s suggests that submarine volcanic eruptions began instead at about 12 Ma.[121][122] At the end of the seamount stage, the seamount was uplifted and its top surface was eroded.[123][124][125] There are a few small areas of old lava flows that some geologists claim represent an upper part of the submarine seamount (a "Basal Complex" similar to those found on some of the other Canarian islands) but this is disputed; an alternative explanation is that the lavas in question instead represent early subaerial shield volcano eruption material that flowed off the island into the ocean.[126]

Roque de Agando, a 220-metre-tall (720 ft) Pliocene lava dome on La Gomera[127]

In the late Miocene, at about 11 Ma, La Gomera's shield-building stage began.[128] The oldest subaerially-erupted lavas on La Gomera have been dated to 9.4 Ma.[129] Most of the subaerial shield volcano's growth occurred from 9.4 to 8.0 Ma.[130] The shield volcano lavas are also known as the Old Edifice.[131] About 8 Ma, the northern part of the mafic alkaline shield volcano collapsed (the Garajonay landslide).[132]

From 7.5 Ma to 6.5 Ma, the Vallehermoso stratovolcano grew on top of the partially collapsed shield volcano by eruption of relatively felsic lavas (phonolites and trachytes) which covered much of the older shield volcano.[133][134][135]

In the early Pliocene, from 5.5 Ma to 4.2 Ma, basaltic lavas were erupted from highland volcanic vents; these lavas flowed over much of the island.[136] For the last 4 million years, there have been no significant volcanic eruptions on the island and La Gomera has been in the erosional stage of its development.[137][138][139][140] (The island's last volcanic eruption was a minor monogenetic eruption at Barranco del Machal, during the Early Pleistocene, about 1.94 Ma).[141] Erosion has exposed the deeper parts of the volcanic edifices, revealing volcanic plugs, dykes, cone sheets, and lower lava flows.[142]

Volcanic eruptions may resume on La Gomera in the future, but some geologists have suggested that La Gomera is already volcanically extinct.[143][144]

## La Palma

[edit]

La Palma's submarine seamount formed from 4 Ma to 3 Ma, in the Pliocene Epoch.[145] The seamount stage rocks are layers of basaltic to trachytic pillow lavas with hyaloclastites and pillow breccias.[146] The seamount's volcanic rocks have been intruded by younger mafic plutons and a mafic dyke swarm. Between 3 Ma and 1.77 Ma, the seamount rocks were uplifted, tilted and eroded. The structurally deepest rocks of the seamount have been metamorphosed to greenschist facies.[147] Small remnants of the seamount stage rocks are now exposed on La Palma as its "Basal Complex", for example in Barranco de las Angustias.[148][149][150]

La Palma's shield-building stage began at 1.77 Ma - the Garafía shield volcano grew, on top of the seamount, between 1.77 Ma and 1.20 Ma (forming the present-day northern part of La Palma), with the oldest subaerial lavas dated to 1.7 Ma. This shield volcano grew quickly to a height of about 3,000 m (9,800 ft) and a diameter of about 23 km (14 mi) but this volcano became unstable and its southern flank collapsed in a large landslide at 1.2 Ma.[151] Only a small part of Garafía shield volcano is visible now because much has been eroded away or is buried by younger lavas. After the Garafía landslide, the focus of volcanic activity moved slightly to the south, producing another shield volcano, named Taburiente volcano, on top of Garafía shield volcano's collapsed southern flank.[152]

Internal structure of Taburiente volcano (consisting of lava flows, tephra and dykes) exposed in the northern cliff of Caldera de Taburiente at Roque de los Muchachos, La Palma (scale: approximately 1,000 metres (3,300 ft) across)

For most of its active period, Taburiente shield volcano erupted basaltic lavas but final phases of its formation included phonolitic and trachytic lavas.[153] Together, the three successive, superimposed shield volcanoes (the seamount, Garafía and Taburiente) form the Northern Shield.[154]

A three-armed Y-shaped volcanic rift system developed at Taburiente volcano; this northern La Palma rift system had three radial arms - northwest, northeast and south - meeting at the shield volcano's summit. Gradually, most of Taburiente's volcanic activity became focused on the south rift.[155] From 810,000 to 560,000 years ago, the southern part of Taburiente shield volcano's edifice grew by volcanic eruptions at the south rift; these eruptions formed Cumbre Nueva, a 10 km-long (6 mi) north-south volcanic ridge in what is now central La Palma.[156][157][158] Cumbre Nueva had a period of particularly rapid growth from 621,000 to 566,000 years ago.[159]

The Northern Shield (back) and Cumbre Vieja (middle and front), looking north from Deseada, La Palma

Taburiente volcano grew to an estimated maximum height of about 3,000 m (9,800 ft)[160] but, about 525,000 years ago,[161] its edifice became unstable and part of its southern flank (including much of the west flank of Cumbre Nueva) collapsed laterally in a landslide with a volume of more than 200 km3 (48 cu mi),[162] resulting in the formation of a large crater named "Caldera de Taburiente"; it is an erosion caldera formed by mass wasting, not a collapse caldera formed by volcanic eruption. The Caldera de Taburiente is a topographic depression; from the time of the landslide until the present day, it has been enlarged by erosion and is now 15 km (9.3 mi) long, 6 km (3.7 mi) wide and 1.5 km (0.93 mi) deep.[163][164][165][166] Also after the landslide, Cumbre Nueva grew rapidly again until about 490,000 years ago.[167] A small stratovolcano, named Bejenado volcano, started forming on the floor of the Caldera de Taburiente about 523,000 years ago; it erupted lavas until about 491,000 years ago.[168] Eruptions of lava occurred at Taburiente volcano until about 400,000 years ago.[169][170][171] Volcanic activity then appears to have paused for the next 275,000 years.[172]

About 125,000 years ago,[173] the focus of volcanic activity moved south again, with eruptions of mostly mafic alkaline lavas gradually forming Cumbre Vieja, a 20 km-long (12 mi) ridge-shaped elevated rift zone volcano that has grown until the present day at southern La Palma's north-south volcanic rift zone. Cumbre Vieja reaches 1,949 m (6,394 ft) in height and it dominates the geology of the southern half of the island.[Note 5][175][176][177] From 125,000 to 20,000 years ago, volcanic eruptions occurred on all arms of southern La Palma's triple-armed volcanic rift system. Between 20,000 and 7,000 years ago, volcanic activity declined on the northwest arm and stopped completely on the northeast arm.[178]

Eruption (4 December 2021) at Tajogaite cinder cone on the west flank of Cumbre Vieja, La Palma

Eight confirmed historical eruptions have occurred at Cumbre Vieja, making La Palma the most volcanically active of the Canary Islands and accounting for half of all the volcanic eruptions in the Canary Islands during this c. 540 year timespan.[179][180] These historical eruptions have mostly been of the strombolian type, forming cinder cones; magmas have been predominantly mafic in composition but some more felsic phonolites have also been produced.[181] Cumbre Vieja is still volcanically active; its three most recent eruptions are Nambroque (1949), Teneguía (1971) and Tajogaite (2021).[182] Geologically recent volcanic eruptions have also occurred along the submarine section of the north-south rift zone that extends about 20 km (12 mi) beyond the southern tip of the island.[183]

Day et al. (1999)[184] suggested that the west flank of Cumbre Vieja is in the initial stages of instability. Modelling by Ward and Day (2001, 2005)[185][186] led them to suggest that if a large landslide of Cumbre Vieja's volcanic rocks were to occur in the next few thousand years, it could displace a large volume of ocean water that would cause widespread tsunami damage along Atlantic Ocean coastlines. This suggestion has been opposed by some geologists who assess southern La Palma's volcanic rift zone to be stable and any generated tsunami would be much smaller than the modelled size, suggesting that Cumbre Vieja's collapse and damage scenarios would be less severe than Ward, Day and some popular science television documentaries have claimed.[187][188] (See also: Cumbre Vieja tsunami hazard and Megatsunami).

## El Hierro

[edit]

Satellite image of El Hierro showing Y-shaped triple-arm rift zones and curved lateral collapse cliffs and bays

El Hierro is the youngest and smallest of the seven main Canary Islands.[189] El Hierro is in its shield-building stage.[190]

During the Early Pleistocene, a submarine seamount grew upwards from the ocean floor, almost to sea level, on top of Cretaceous-Pliocene oceanic sediments.[191][192]

Lava flows and volcanic cones of the rift volcanism phase at the south-south-east rift zone near La Restinga, El Hierro

Then, at 1.2 Ma, Tiñor shield volcano began to form on top of the seamount.[193] Tiñor volcano's first subaerial lava was erupted at 1.12 Ma.[194] Tiñor grew by erupting lavas across what is now the eastern half of El Hierro until about 882,000 years ago; the eruptions were mostly of effusive basaltic lava, but there was also an explosive, xenolith-rich last eruptive phase (the Ventejís volcanics).[195] Instability in the edifice of Tiñor volcano resulted in the Tiñor lateral collapse landslide at about 882,000 years ago when much of the volcano's northwest flank slid downwards and onto the ocean floor.[196][197] This left a curved bay where the volcano's flank had been.

About 545,000 years ago,[198][199] El Hierro's second subaerial shield volcano, named El Golfo volcano (also known as the El Golfo-Las Playas Edifice),[200][c] started erupting. Its summit was slightly to the west of Tiñor volcano. Lavas from El Golfo volcano filled the bay that had been formed by the Tiñor landslide. El Golfo volcano's later lava flows covered the remains of Tiñor volcano. At its maximum development, El Golfo volcano was about 2,000 m (6,600 ft) high and about 20 km (12 mi) in diameter, with a surface area slightly larger than present-day El Hierro and about twice the area that Tiñor volcano had covered.[201][202] El Golfo volcano grew by erupting lava from a Y-shaped rift system with west-north-west, north-north-east and south-south-east arms; most of the eruptions occurred on the west-north-west and north-north-east arms.[203] Late-stage eruptions were of more differentiated lavas. El Golfo volcano gave El Hierro a roughly circular shape at this time.[204] There were eruptions at El Golfo volcano until about 176,000 years ago.[205]

The volcanic edifices of El Hierro were affected by at least two other large lateral collapse landslides of uncertain age:[206]

1. the El Julán lateral collapse, in which much of the southwest flank of El Golfo volcano slid downwards and onto the ocean floor, occurred at least 158,000 years ago;[207]
2. at least 145,000 years ago, the Las Playas lateral collapse occurred on the southeast flank of El Golfo volcano.
3. At about 100,000 years ago, slumping near Las Playas did not result in complete downward slumping of El Golfo volcano's southeast flank into the ocean; instead, a large block of rock moved about 300 m (980 ft) down a steeply-inclined fault (the now inactive San Andrés fault) in what has been described as an "aborted" lateral collapse.[208][209]

El Hierro's third, and current, major phase of volcanic activity is rift volcanism; it started about 158,000 years ago.[210][211] This rift volcanism occurs at a Y-shaped volcanic rift zone system with west-north-west, north-north-east and south-south-east arms that meet at the centre of the island; all of the three rift arms have been very volcanically active.[212][213] There are about 200 monogenetic cinder cones along the ridge crests of the three rift zones: the highest density of such cones in the Canary Islands.[214] Rift phase lavas cover most of the island, not only forming the ridges along each rift zone but also partially infilling the landslide bays. The rift zones extend outwards as submarine volcanic ridges on the ocean floor; for example, the south-south-east rift zone extends underwater to at least 40 km (25 mi) south of the island.[215]

El Golfo landslide scarp, depression (now a coastal plain) and bay, El Hierro

Instability in the edifice of El Golfo volcano resulted in El Hierro's youngest and largest landslide, the El Golfo lateral collapse landslide, when a large part (with a volume of 180 km3 (43 cu mi)) of the volcano's northern flank slid downwards off the island and onto the ocean floor; individual blocks of moved material, up to 1,200 m (3,900 ft) across, have slid as much as 65 km (40 mi) from their original positions.[216][217] This landslide formed the curved 14 km-wide (8.7 mi) El Golfo bay and a curved landslide scar depression, where the volcano's flank had been; the bay still forms the curved northwest coast of El Hierro.[218] The El Golfo landslide scarp is preserved today as a 26 km-long (16 mi) cliff with a maximum height of 1,400 m (4,600 ft); the cliff is roughly parallel to the coast but about 2–4 km (1.2–2.5 mi) inland, except at each end, where the cliff meets the coast. The age of the El Golfo lateral collapse landslide is poorly constrained; it occurred sometime between 133,000 and 13,000 years ago.[219] Evidence found on land favours the older end of this age range; evidence on the ocean floor favours a young age.[220] Carracedo et al. (1999)[221] have suggested that the conflicting evidence from land and ocean floor can be reconciled if there were two landslides instead of a single event: first, a collapse of the subaerial part of the El Golfo volcanic edifice at 133,000 years ago, then a submarine landslide at 13,000 years ago.[222][223]

Aerial view of the green eruption plume of the Tagoro submarine eruption at El Hierro, 2011–2012 (with the village of La Restinga in the background). The plume is drifting from centre-right to bottom-left.

It has been estimated that the large landslides on El Hierro removed more than two-thirds of the total volume of lava erupted subaerially by the two shield volcanoes and the rift cinder cones of the island.[224] This removal of lava has hampered efforts to estimate El Hierro's magma production and eruption rates.[225]

In the last 33,000 years, 31 land-based volcanic eruptions are known to have occurred on El Hierro.[226] Of the volcanic eruptions on land at El Hierro that have been dated, the two most recent were at 2,500 years ago (at Montaña Chamuscada), and 2,280 years ago (at Montaña Los Cascajos), both located on the north-north-east rift.[227]

In 2011, a period of seismic unrest (associated with underground movements of molten magma) was followed by El Hierro's most recent volcanic eruption, which occurred underwater on the volcanic rift about 2 km (1.2 mi) south of the southern tip of the island.[228] From October 2011 to March 2012, lava erupted from a submarine volcanic vent, which was later named Tagoro.[229][230] Initially, this volcanic edifice was at a depth of 350 m (1,150 ft), but by the end on the eruption, the edifice had grown to 88 m (289 ft) below sea level.[231]

## Possible future islands

[edit]

One or more of the seamounts in the western part of the Canary Volcanic Province may erupt enough lava to form new islands in the future. For example, El Hijo de Tenerife is a 600 m-tall (2,000 ft) seamount on the ocean floor between Gran Canaria and Tenerife. It is about 200,000 years old and it is thought that it may form a new island within the next 500,000 years.[232][233] This seamount is in one of the most seismically active parts of the Canary Islands region.[234]

A group of three seamounts called Las Hijas (Spanish for 'The Daughters') are located on the ocean floor 70 km (43 mi) southwest of El Hierro. These seamounts were surveyed by side-scan sonar in 1997 and were assumed to be less than about 500,000 years old and, therefore, were suggested as candidates for eventually becoming new islands.[235][236] However, later dating of rock samples from Las Hijas has yielded ages of about 141 Ma, which would make Las Hijas probably the oldest seamounts in the Atlantic Ocean.[237] This old age prompted an alternative name to be suggested: 'Bisabuelas' (Spanish for 'Great-grandmothers').[238]

## Earthquakes

[edit]

The seismicity of the Canary Islands is very low to low.[239] Earthquakes that occur on or near the Canary Islands are linked to volcanism and tectonism: scenarios include underground magma movement in dykes or magma chambers, normal faulting and reverse faulting.[240]

On the Modified Mercalli Scale (an earthquake intensity scale ranging from I for "not felt" to XII for "extreme"), most documented earthquakes in the region have had an intensity of VI or less. The Timanfaya eruptions on Lanzarote in 1730, however, were accompanied by earthquakes with intensities of up to X on the same scale.[239] Earthquakes of intensity VII have occurred on La Palma (1677, 1920), on Gran Canaria (1913), and on Fuerteventua (1915, 1917).[241]

From 1 January 1975 to 31 December 2023, 168 earthquakes of magnitude 2.5 or larger, with epicentres on or close to the Canary Islands, were recorded; the largest of these earthquakes had a mb magnitude of 5.4 and an intensity of VII with its epicentre on the ocean floor about 28 km (17 mi) west of El Hierro in 2013.[242][243]

In 2004, an earthquake swarm occurred on Tenerife, which raised concern that a volcanic eruption may have been about to occur but no such eruption followed the swarm.[244][245]

Earthquake swarms, due to the underground movement of molten magma, were detected before and during the volcanic eruptions of 2011–2012 and 2021. In the week before the 2021 eruption on La Palma, a swarm of more than 22,000 earthquakes occurred, with mbLg magnitudes up to about 3.5. The hypocentres of successive earthquakes migrated upwards as magma rose slowly to the surface.[246][247][248] During the eruption, larger earthquakes were detected, for example an earthquake of mbLg magnitude 4.3 occurred 35 km (22 mi) below the surface.[249]

In the last 500 years, at least four tsunamis that were triggered by distant earthquakes, have hit the coasts of the Canary Islands. They occurred in 1755 (1755 Lisbon earthquake), 1761 (1761 Lisbon earthquake), 1941 (1941 Gloria Fault earthquake) and 1969.[250]

## Geological resources

[edit]

### On the islands

[edit]

Montaña de El Palmar, Tenerife showing quarried sectors of the volcanic cone

Volcanic rock has been extracted at quarries scattered across the Canary Islands. This includes at some volcanic cones, for example Montaña de El Palmar in northwest Tenerife where basaltic lapilli tephra (known locally as "pincòn") has been removed for use as horticultural substrate.[251][252][253]

Phonolitic and trachytic pyroclastic rocks (including pumice) of intermediate composition have been used as a building material. For example, Bandas del Sur ignimbrite of the Poris Formation has been extracted from quarries at Tajao and at Poris de Abona in southern Tenerife.[254][255][256] Similar pyroclastic rock has been extracted from quarries on Gran Canaria and Fuerteventura.[257]

On Gran Canaria, lapilli have been extracted at quarries for use in heat exchangers, and for filters that remove dust from gases.[258]

The sedimentary rock calcrete (also known as caliche) was extracted at some quarries in southwestern Gran Canaria, then heated in kilns to produce lime for use in construction.[259]

Ore deposits of some rare-earth elements have been found in two settings in the Canary Islands: (1) pegmatitic syenites of southwest Tenerife and northeast La Gomera; (2) carbonatites in the Basal Complex of northwest and central Fuerteventura.[260]

Laguna de Barlovento reservoir, La Palma

The potential exploitation of shallow high-enthalpy geothermal energy resources (originating from volcanic heat in bedrock) has been investigated on Lanzarote, Tenerife and La Palma. High-enthalpy geothermal energy has been used to heat the water supply of a winery on Lanzarote using a borehole heat exchanger field of twelve boreholes, as part of the Shallow Geothermal Energy for the Canary Islands (SAGE4CAN) project.[261][262][263][264] As of 2023[update], an experimental project on Lanzarote has been investigating the  generation of electricity using the hot dry rock heat source provided by the island's geologically recent volcanic activity at Timanfaya, where installed thermoelectric generators are capable of producing 4.4 MWh of electricity per year.[265]

Reservoirs for fresh water have been built in the craters of some volcanic cones, e.g. Laguna de Barlovento (in northeast La Palma)[266] and Montaña de Taco (in northwest Tenerife).[267]

#### Geotourism

[edit]

Tourists at Jameos del Agua lava tube on Lanzarote in 2022

The geological features and landscapes of the Canary Islands are sites of geotourism. Many features and sites are protected in a network of national parks, natural parks, rural parks, natural reserves, natural monuments, and sites of scientific interest, including the following:[268][269][270][271][272]

Fuerteventura

* Corralejo Natural Park
* Jandía Natural Park

Lanzarote

* Timanfaya National Park
* Los Volcanes Natural Park
* Lanzarote and Chinijo Islands UNESCO Global Geopark
* Jameos del Agua
* Cueva de los Verdes

Gran Canaria

* Tamadaba Natural Park
* Pilancones Natural Park
* Maspalomas Dunes Natural Reserve
* Inagua Natural Reserve
* Roque Nublo Rural Park

|  |

Tenerife

* Teide National Park (also a UNESCO World Heritage Site)
* Barranco del Infierno Natural Reserve
* Montaña Roja Special Natural Reserve

La Gomera

* Garajonay National Park (also a UNESCO World Heritage Site)
* Los Roques Natural Monument
* Los Órganos de La Gomera Natural Monument

La Palma

* Caldera de Taburiente National Park

El Hierro

* El Hierro UNESCO Global Geopark
* Frontera Rural Park
* Roques de Salmor Natural Park

|
|

TFGeoturismo is a local government project promoting geotourism in Tenerife. It began in 2017 and is supported by the Cabildo (Island Council) of Tenerife and operated by INVOLCAN, the organisation that oversees various aspects of volcano–human interaction in the Canary Islands. Teide National Park is particularly significant in Tenerife's geotourism strategy because it provides a high profile opportunity to improve public awareness of Tenerife's volcanic heritage; it is Spain's most visited national park and one of the world's most visited volcanic areas. (In 2016, 2017 and 2018, Teide National Park had more than 4 million visitors per year). TFGeoturismo has promoted Teide National Park by making and screening a documentary film about the park, as well as publishing a guidebook describing and explaining the park's geology, geomorphology and volcano-related natural and cultural heritage. The project has also published a set of urban geotourism guide leaflets for more than 20 municipalities of Tenerife, e.g. Garachico. TFGeoturismo has published a guide promoting the role of Tenerife in the history of science, describing 18 locations along the route of Alexander von Humboldt's notable 1799 journey from Puerto de la Cruz to the summit of Teide. The project also maintains a website.[273][274]

Even before tourism became a major part of La Palma's economy, some tourists were attracted to the island due to the 1949 and 1971 volcanic eruptions. Although the 2021 eruption had numerous negative effects for La Palma's resident population, tourists who wanted to see a volcanic eruption visited the island. A survey of 1,026 people who visited La Palma during the 2021 eruption indicated that most of the tourists came from the other Canarian islands and that the erupting volcano had become the island's main tourist attraction, with 64.3% of survey respondents stating that their reason for visiting La Palma was to witness the volcanic eruption. The survey respondents also stated that the most memorable aspects of their volcanic eruption experience were volcanic noise, volcanic ash fall, glowing molten lava (particularly at night), and damage to buildings and infrastructure.[275]

### Offshore

[edit]

The sedimentary rocks under the ocean between the eastern islands of the Canarian archipelago and Africa, e.g. the Fúster Casas Trough, are believed to contain hydrocarbons.[276] Exploration of these resources is underway.[277] As of 2019[update], one offshore well (Sandia-1) had found petroleum in Tertiary-age sandstone.[278] As of 2020[update], two offshore exploration wells had found heavy oil but they are not commercially viable.[279]

## See also

[edit]

* Canary Islands Seamount Province – a group of seamounts off the coast of northwest Africa
* Geology of Cape Verde \- a group of volcanic islands, 1,400 km (870 mi) southwest of the Canary Islands
* Geology of Madeira – a group of volcanic islands, 450 km (280 mi) north of the Canary Islands
* Geology of Morocco – nearby country on the African mainland
* Longshore drift – Sediment moved by the longshore current
* Pico do Fogo – Mountain peak in Cape Verde – a stratovolcano in the caldera of an island shield volcano, formed on top of a seamount

## Further reading

[edit]

* Carracedo, Juan Carlos; Day, Simon (2002). The Canary Islands (Classic Geology in Europe). Terra Books. ISBN 978-1-903544-07-5.
* Carracedo, Juan Carlos; Troll, Valentin R. (2016). The Geology of the Canary Islands. Amsterdam: Elsevier. ISBN 978-0-12-809663-5.

## Notes

[edit]

1. ^ Since 2018, La Graciosa has been officially designated "la octava isla canaria habitada"[1] (the eighth inhabited island of the Canary Islands), in effect the eighth "main island". This is only a political and social designation. La Graciosa continues to be a geologically minor island of the Canary Islands, associated with its much larger neighbour Lanzarote.
2. ^ Since 2018, La Graciosa has been officially designated "la octava isla canaria habitada"[1] (the eighth inhabited island of the Canary Islands), in effect the eighth "main island". This is only a political and social designation. La Graciosa continues to be a geologically minor island of the Canary Islands, associated with its much larger neighbour Lanzarote.
3. ^ The summit of Teide is 3,715 m above sea level. The volcanic cone of Teide rises 1,525 m above the floor of Las Cañadas caldera. At Teide, the volcanic edifice of Tenerife comprises Teide stratovolcano cone on top of the remains of Las Cañadas stratovolcano on top of the remains of the central shield volcano on top of the remains of the seamount.[20] Tenerife's volcanic edifice has a total height of 7,500 m (half of which is below sea level).
4. ^ 20.2 Ma for Fuerteventura; 15.6 Ma for Lanzarote.[24]
5. ^ Cumbre Vieja means Old Summit; Cumbre Nueva means New Summit. The Old and New adjectives refer to dates of forestation. Geologically, however, Cumbre Vieja is younger than Cumbre Nueva.[174]

1. ^ Teide and Pico Viejo are referred to in various ways: for example, Teide stratocone and Pico Viejo stratocone, Teide edifice and Pico Viejo edifice, Teide stratovolcano and Pico Viejo stratovolcano, Teide-Pico Viejo stratovolcano, Teide volcano and Pico Viejo volcano, Teide-Pico Viejo Volcanic Complex, Central Volcanic Complex of Tenerife, and Teide Volcanic Complex.
2. ^ Montaña Blanca, on the south-east flank of Teide, is sometimes included as a third volcano in the Teide-Pico Viejo Volcanic Complex.
3. ^ El Golfo shield volcano on El Hierro should not to be confused with El Golfo tuff cone volcano on Lanzarote.

## References

[edit]

1. ^ a b "El Senado reconoce a La Graciosa como la octava isla canaria habitada" [The Senate recognizes La Graciosa as the eighth inhabited Canary Island]. El País (in Spanish). 26 June 2018. Retrieved 4 December 2019.
2. ^ a b Carracedo, Juan Carlos; Troll, Valentin R. (2021), "North-East Atlantic Islands: The Macaronesian Archipelagos", in Alderton, David; Elias, Scott A. (eds.), Encyclopedia of Geology (Second Edition), Oxford: Academic Press, pp. 674–699, doi:10.1016/b978-0-08-102908-4.00027-8, ISBN 978-0-08-102909-1, S2CID 226588940, retrieved 2021-03-16
3. ^ a b Carracedo, J.C.; Troll, V.R.; Zaczek, K.; Rodríguez-González, A.; Soler, V.; Deegan, F.M. (2015) The 2011–2012 submarine eruption off El Hierro, Canary Islands: New lessons in oceanic island growth and volcanic crisis management, Earth-Science Reviews, volume 150, pages 168–200, doi:10.1016/j.earscirev.2015.06.007
4. ^ a b Tanguy, J-C. and Scarth, A. (2001) “Volcanoes of Europe”, Harpenden, Terra Publishing, ISBN 1-903544-03-3, page 101
5. ^ "Lava shoots up from volcano on La Palma in Spanish Canary Islands". Reuters. 2021-09-19. Retrieved 2021-09-19.
6. ^ Schmincke, H.U. and Sumita, M. (1998) Volcanic Evolution of Gran Canaria reconstructed from Apron Sediments: Synthesis of VICAP Project Drilling in Weaver, P.P.E., Schmincke, H.U., Firth, J.V., and Duffield, W. (editors) (1998) Proceedings of the Ocean Drilling Program, Scientific Results, volume 157
7. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 532
8. ^ a b Paris, R. (2002) "Rythmes de noconstruction et de destruction des édifices volcaniques de point chaud : I'exemple des lIes Canaries (Espagne)", [Rhythms of neoconstruction and destruction of volcanic hot spot edifices: the example of the Canary Islands (Spain)], Université Paris 1 Panthéon Sorbonne - Universidad de Las Palmas - Laboratoire de Géographie Physique CNRS, PhD Doctoral Thesis, page 15, table 1 (in French)
9. ^ Lang, N.P., Lang, K.T., Camodeca, B.M. (2012) "A geology-focused virtual field trip to Tenerife, Spain", Geological Society of America Special Paper 492, pages 323-334, doi:10.1130/2012.2492(23)
10. ^ Vera, J.A. (editor) (2004) "Geologia de Espana", Madrid, SGE-IGME (in Spanish) page 637
11. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 5 and 6
12. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 9
13. ^ Schmincke, H.U. and Sumita, M. (1998) "Volcanic Evolution of Gran Canaria reconstructed from Apron Sediments: Synthesis of VICAP Project Drilling" in Weaver, P.P.E., Schmincke, H.-U., Firth, J.V., and Duffield, W. (editors) (1998) "Proceedings of the Ocean Drilling Program, Scientific Results", volume 157.
14. ^ Stearns, H.T. (1946) "Geology of the Hawaiian Islands", Hawaii Division of Hydrography, Bulletin 8
15. ^ Coelo et al. (1992) "Evolution of the eastern volcanic ridge of the Canary Islands based on new K-Ar data", Journal of Volcanology and Geothermal Research, volume 53, issues 1–4, doi:10.1016/0377-0273(92)90085-R, pages 251–274
16. ^ a b c d e f Viñuela, J.M. (2007). "The Canary Islands Hot Spot" (PDF). www.mantleplumes.org. Archived (PDF) from the original on 18 August 2019. Retrieved 30 November 2019.
17. ^ Dill, H.G.; Buzatu, A.; Balaban, S-I.; Rüsenberg, K.A. (2023) "A mineralogical-geomorphological terrain analysis of hotspot volcanic islands - The missing link between carbonatite- and pegmatite Nb-F-Zr-Li-Be-bearing REE deposits and new tools for their exploration (Canary Islands Archipelago, Spain)", Ore Geology Reviews, volume 163, article 105702
18. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 183
19. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 532
20. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 229
21. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 134
22. ^ Martínez-García, E. Spain in Moores, E.M. and Fairbridge, R. (editors) (1997) Encyclopedia of European and Asian Regional Geology, London, Chapman and Hall, ISBN 0-412-74040-0, page 680
23. ^ How big are the Hawaiian volcanoes? ; United States Geological Survey; Frequently Asked Questions - Natural Hazards; https://web.archive.org/web/20220205034730/https://www.usgs.gov/faqs/how-big-are-hawaiian-volcanoes ; Retrieved 1 August 2024
24. ^ Coello et al. (1992) "Evolution of the eastern volcanic ridge of the Canary Islands based on new K-Ar data", Journal of Volcanology and Geothermal Research, volume 53, pages 251-274
25. ^ Carracedo, J.C and Troll, V.R. (editors) (2013) "Teide Volcano:Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", Berlin, Springer-Verlag, ISBN 978-3-642-25892-3, Page 24
26. ^ Zaczek, K. et al. (2015) "Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands", Scientific Reports, volume 5, article 7945, doi:10.1038/srep07945
27. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 140
28. ^ Bell, K.; Tilton, G.R. (2002). "Probing The Mantle: The Story From Carbonatites". Eos. 83 (25): 273–280. Bibcode:2002EOSTr..83..273B. doi:10.1029/2002EO000190.
29. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands"’, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 224–225
30. ^ IGME "Mapa Geológico Continuo de España a escala 1/50.000", ["Continuous Geological Map of Spain scale 1/50000"], https://hub.arcgis.com/maps/IGME::mapa-geológico-continuo-de-españa-a-escala-1-50-000-continuous-geological-map-of-spain-scale-1-50-000/explore?location=28.210836,-17.275109,14.87 Retrieved 15 August 2024
31. ^ Tanguy, J-C. and Scarth, A. (2001) Volcanoes of Europe. Harpenden, Terra Publishing, ISBN 1-903544-03-3, page 100
32. ^ Vonlanthen, P.; Kunze, K.; Burlini, L.; Grobety, B. (2006). "Seismic properties of the upper mantle beneath Lanzarote (Canary Islands): Model predictions based on texture measurements by EBSD" (PDF). Tectonophysics. 428 (1–4): 65–85. Bibcode:2006Tectp.428...65V. doi:10.1016/j.tecto.2006.09.005.
33. ^ Carracedo, J.C. and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", page 25
34. ^ Yepes, J.A. (2007). "The Canary Islands Topobathymetric Relief Map - Aspect Of The Sea Bed And Geology" (PDF). Spanish Institute of Oceanography (IEO). Retrieved 25 July 2018.
35. ^ Weis, F.A.; Skogby, H.; Troll, V.R.; Deegan, F.M.; Dahren, B. (2015). "Magmatic water contents determined through clinopyroxene: Examples from the Western Canary Islands, Spain". Geochemistry, Geophysics, Geosystems. 16 (7): 2127–2146. Bibcode:2015GGG....16.2127W. doi:10.1002/2015GC005800. hdl:10553/72171. S2CID 128390629.
36. ^ Guillou, H.; Carracedo, J.C.; Paris, R.; Perez Torrado, F.J. (2004) "Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy", Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
37. ^ Hoernle, K. and Carracedo, J-C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 142
38. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 15-16
39. ^ Zaczek, K. et al. (2015) "Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands", Scientific Reports, volume 5, article 7945, doi:10.1038/srep07945
40. ^ a b c Spain Volcanoes – Smithsonian Institution Global Volcanism Program, retrieved 26 November 2023; https://volcano.si.edu/volcanolist_countries.cfm?country=Spain
41. ^ Carracedo, J.C and Troll, V.R. (editors) (2013) "Teide Volcano:Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", Berlin, Springer-Verlag, ISBN 978-3-642-25892-3, Page 105
42. ^ a b Tanguy, J-C. and Scarth, A. (2001) "Volcanoes of Europe", Harpenden, Terra Publishing, ISBN 1-903544-03-3, page 101
43. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 135
44. ^ Lanzarote - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383060
45. ^ Fuerteventura - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383050
46. ^ Gran Canaria - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383040
47. ^ Tenerife - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383030
48. ^ La Palma - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383010
49. ^ Hierro - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383020
50. ^ Spain Volcanoes – Holocene Eruptions, Smithsonian Institution Global Volcanism Program, retrieved 13 July 2024; https://volcano.si.edu/volcanolist_countries.cfm?country=Spain
51. ^ Hansen Machin, A. and Perez Torrado, F. (2005) "The Island and it's Territory: Volcanism in Lanzarote", Sixth International Conference on Geomorphology, Field Trip Guide C-1, page 6
52. ^ Becerril, L. et al. (2017) "Assessing qualitative long-term volcanic hazards at Lanzarote Island (Canary Islands)", Nat. Hazards Earth Syst. Sci., volume 17, pages 1145–1157, doi:10.5194/nhess-17-1145-2017
53. ^ Coello et al. (1992) "Evolution of the eastern volcanic ridge of the Canary Islands based on new K-Ar data", Journal of Volcanology and Geothermal Research, volume 53, pages 251-274
54. ^ Hansen Machin, A. and Perez Torrado, F. (2005) "The Island and it's Territory: Volcanism in Lanzarote", Sixth International Conference on Geomorphology, Field Trip Guide C-1, page 7
55. ^ Instituto Geológico y Minero de España (IGME) Cartográfica de Canarias (GRAFCAN) (2015) "Descripción de las Unidades Geológicas de Lanzarote" for "Mapa Geológico de Canarias", Instituto Geológico y Minero de España; Madrid, Spain: 2015. Gobierno de Canarias [Government of the Canary Islands], CARTOGRAF, FEDER, Programa MAC 2007–2013, 1992–1994, page 2
56. ^ Hansen Machin, A. and Perez Torrado, F. (2005) "The Island and it's Territory: Volcanism in Lanzarote", Sixth International Conference on Geomorphology, Field Trip Guide C-1, page 8
57. ^ a b Instituto Geológico y Minero de España (IGME) Cartográfica de Canarias (GRAFCAN) (2015) "Descripción de las Unidades Geológicas de Lanzarote" for "Mapa Geológico de Canarias", Instituto Geológico y Minero de España; Madrid, Spain: 2015. Gobierno de Canarias [Government of the Canary Islands], CARTOGRAF, FEDER, Programa MAC 2007–2013, 1992–1994, page 3
58. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 58
59. ^ Instituto Geológico y Minero de España (IGME) Cartográfica de Canarias (GRAFCAN) (2015) "Descripción de las Unidades Geológicas de Lanzarote" for "Mapa Geológico de Canarias", Instituto Geológico y Minero de España; Madrid, Spain: 2015. Gobierno de Canarias [Government of the Canary Islands], CARTOGRAF, FEDER, Programa MAC 2007–2013, 1992–1994, pages 3 and 4
60. ^ Carracedo, J.C. and Day, S. (2002) “Canary Islands”, Harpenden, Terra Publishing, ISBN 1-903544-07-6, pages 1–11, 57
61. ^ Hoernle, K. and Carracedo, J-C. “Canary Islands, Geology” in Gillespie, R. and Clague, D. (editors) (2009) “Encyclopedia of Islands”, page 140
62. ^ Lanzarote and Chinijo Archipelago Geopark http://www.geoparquelanzarote.org/geologia/
63. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 486
64. ^ Hoernle, K. and Carracedo, J-C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 140
65. ^ Carracedo J.C. and Perez Torrado, F.J. "Cenozoic Volcanism in the Canary Islands: Canarian geochronology, stratigraphy and evolution: an overview" in Gibbons, W. and Moreno, T. (editors) (2002) "Geology of Spain", London, The Geological Society, ISBN 1-86239-110-6, page 463
66. ^ Schmincke, H.U. and Sumita, M. (1998) "Volcanic Evolution of Gran Canaria reconstructed from Apron Sediments: Synthesis of VICAP Project Drilling" in Weaver, P.P.E., Schmincke, H.-U., Firth, J.V., and Duffield, W. (editors) (1998) "Proceedings of the Ocean Drilling Program, Scientific Results", volume 157
67. ^ Padilla, G. et al. (2010) "Diffuse CO2 Emission from Timanfaya Volcano, Lanzarote, Canary Islands, Spain", Cities on Volcanoes - Conference 6 - Abstracts
68. ^ Purcell, V. et al. (2022) "Nearly Three Centuries of Lava Flow Subsidence at Timanfaya, Lanzarote", Geochemisty Geophysics Geosystems, volume 23, article e2022GC010576, DOI=10.1029/2022GC010576
69. ^ Mitchell-Thomé, Raoul C. (1976) "Geology of the Middle Atlantic Islands", Berlin, Gebrueder Borntraeger, ISBN 3-443-11012-6, pages 170 and 174
70. ^ Tornare, E; Pilet, S.; Bussy, F. (2016) "Magma Differentiation in Vertical Conduits Revealed by the Complementary Study of Plutonic and Volcanic Rocks from Fuerteventura (Canary Islands)", Journal of Petrology, volume 57, pages 2221–2250, doi:10.1093/petrology/egx004
71. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 19
72. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 532
73. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, pages 24–25
74. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 533–534
75. ^ Carracedo, J.C. and Troll, V.R. (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 533
76. ^ Hoernle, K. A. and Tilton, G. R. (1991) "Sr-Nd-Pb isotope data for Fuerteventura (Canary Islands) basal complex and subaerial volcanics: applications to magma genesis and evolution", Schweizerische Mineralogische und Petrographische Mitteilungen, volume 71, pages 3–18, doi:10.5169/seals-54342
77. ^ Ancochea, E. "Canary Islands: Evolution of volcanic activity" in Vera, J.A. (editor) (2004) "Geología de España", Madrid, SGE-IGME (in Spanish), pages 637–642
78. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 140
79. ^ Balogh, K.; Ahijado, A.; Casillas, R.; Fernandez, C. (1999) "Contributions to the chronology of the Basal Complex of Fuerteventura, Canary Islands", Journal of Volcanology and Geothermal Research, volume 90, pages 81–101
80. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 140
81. ^ Casillas, R. and Ahijado, A. "Cenozoic Volcanism in the Canary Islands: Fuerteventura" in Gibbons, W. and Moreno, T. (editors) (2002) "Geology of Spain", London, The Geological Society, ISBN 1-86239-110-6, page 442
82. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 140
83. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, page 140
84. ^ Fuerteventura - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383050
85. ^ Casillas, R. and Ahijado, A. "Cenozoic Volcanism in the Canary Islands: Fuerteventura" in Gibbons, W. and Moreno, T. (editors) (2002) "Geology of Spain", London, The Geological Society, ISBN 1-86239-110-6, page 444
86. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
87. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
88. ^ Schmincke, H-U (2004) "Volcanism", Berlin, Springer-Verlag, ISBN 3-540-43650-2, page 90.
89. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
90. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
91. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
92. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
93. ^ Schneider, J-L. et al. (2004) "Sedimentary signatures of the entrance of coarse-grained volcaniclastic flows into the sea: the example of the breccia units of the Las Palmas Detritic Formation (Mio–Pliocene, Gran Canaria, Eastern Atlantic, Spain)", Journal of Volcanology and Geothermal Research, volume 138, pages 295–323
94. ^ Hoernle, K. and Carracedo, J.C. Canary Islands, Geology in Gillespie, R. and Clague, D. (editors) (2009) Encyclopedia of Islands, pages 139–140
95. ^ Gran Canaria - Eruption history ; Smithsonian Institution Global Volcanism Program, retrieved 08 Nov 2023; https://volcano.si.edu/volcano.cfm?vn=383040
96. ^ Fontán-Bouzas, Á. et al. (2019) "Multiannual Shore Morphodynamics of a Cuspate Foreland: Maspalomas (Gran Canaria, Canary Islands)", Journal of Marine Science and Engineering, volume 7, issue 11, page 416, doi:10.3390/jmse7110416
97. ^ IGME Carta geologica, (1989 map and 1990 memoir) Magna 50k (2nd Series), 1:25000, Sheet 1114-III (Maspalomas) http://info.igme.es/cartografiadigital/datos/magna50/pdfs/d11_G50/Magna50_11143.pdf and http://info.igme.es/cartografiadigital/datos/magna50/memorias/MMagna1114III.pdf pages 51 and 52
98. ^ Dunas cuaternarias de Maspalomas (in Spanish), Inventario Español de Lugares de Interés Geológico, IGME, https://info.igme.es/ielig/LIGInfo.aspx?codigo=IC3012 , retrieved 15 February 2024
99. ^ Smith, A.B.; Jackson, D.W.T.; Cooper, J.A.G.; Hernández-Calvento, L. (2017) "Quantifying the Role of Urbanization on Airflow Perturbations and Dunefield Evolution", Earth's Future, volume 5, issue 5, doi:10.1002/2016EF000524
100. ^ IGME Carta geologica, (1989 map and 1990 memoir) Magna 50k (2nd Series), 1:25000, Sheet 1114-III (Maspalomas) http://info.igme.es/cartografiadigital/datos/magna50/pdfs/d11_G50/Magna50_11143.pdf and http://info.igme.es/cartografiadigital/datos/magna50/memorias/MMagna1114III.pdf
101. ^ "Environmental restoration of the Maspalomas dune system (MASDUNAS Project)" Plataforma sobre Adaptación al Cambio Climático en España https://adaptecca.es/en/casos-practicos/environmental-restoration-maspalomas-dune-system-masdunas-project#:~:text=There is no mention of,and the ecosystem of La ; retrieved 7 March 2024)
102. ^ La Provincia - Diario de Las Palmas (12 October 2021) "Un tsunami, en el origen de las dunas de Maspalomas", https://www.laprovincia.es/gran-canaria/2021/10/12/tsunami-origen-dunas-maspalomas-58318280.html ; (in Spanish), retrieved 7 March 2024
103. ^ Guillou, H., Carracedo, J.C., Paris, R., and Perez Torrado, F.J. (2004) “Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy”, Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
104. ^ Guillou, H., Carracedo, J.C., Paris, R., and Perez Torrado, F.J. (2004) "Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy", Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
105. ^ Guillou, H., Carracedo, J.C., Paris, R., and Perez Torrado, F.J. (2004) "Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy", Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
106. ^ Guillou, H., Carracedo, J.C., Paris, R., and Perez Torrado, F.J.(2004) "Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy", Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
107. ^ Carracedo, J.C. and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", page 32
108. ^ Andujar, J.; Scaillet, B. (2012) "Experimental Constraints on Parameters Controlling the Difference in the Eruptive Dynamics of Phonolitic Magmas: the Case of Tenerife (Canary Islands)", Journal of Petrology, volume 53, number 9, pages 1777-1806, doi:10.1093/petrology/egs033
109. ^ Carracedo, J.C. and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", page 84
110. ^ Carracedo, J.C. and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", page 33
111. ^ Carracedo, J.C.; Guillou, H.; Perez-Torrado, F.J.; and Rodríguez-Badiola, E. "Volcanic History and Stratigraphy of the Teide Volcanic Complex", chapter 7 in Carracedo, J.C and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", Berlin, Springer-Verlag, ISBN 978-3-642-25892-3, page 106
112. ^ Martí, J. (2019) "Las Cañadas caldera, Tenerife, Canary Islands: A review, or the end of a long volcanological controversy", Earth-Science Reviews, volume 196, article 102889, doi:10.1016/j.earscirev.2019.102889
113. ^ Martí, J. (2019) "Las Cañadas caldera, Tenerife, Canary Islands: A review, or the end of a long volcanological controversy", Earth-Science Reviews, volume 196, article 102889, doi:10.1016/j.earscirev.2019.102889
114. ^ Carracedo, J.C. (2008) "Outstanding geological values: the basis of Mt Teide’s World Heritage nomination", Geology Today, Volume 23, Number 3, pages 104–111
115. ^ Martí, J. (2019) "Las Cañadas caldera, Tenerife, Canary Islands: A review, or the end of a long volcanological controversy", Earth-Science Reviews, volume 196, article 102889, doi:10.1016/j.earscirev.2019.102889
116. ^ Andujar, J.; Scaillet, B. (2012) "Experimental Constraints on Parameters Controlling the Difference in the Eruptive Dynamics of Phonolitic Magmas: the Case of Tenerife (Canary Islands)", Journal of Petrology, volume 53, number 9, pages 1777-1806, doi:10.1093/petrology/egs033
117. ^ Ablay et al. (1998) "Basanite–Phonolite Lineages of the Teide–Pico Viejo Volcanic Complex, Tenerife, Canary Islands", Journal of Petrology, volume 39, number 5, pages 905–936
118. ^ Spain Volcanoes – Holocene Eruptions, Smithsonian Institution Global Volcanism Program, retrieved 13 July 2024; https://volcano.si.edu/volcanolist_countries.cfm?country=Spain
119. ^ Carracedo, J.C. and Troll, V.R. (editors) (2013) "Teide Volcano: Geology and Eruptions of a Highly Differentiated Oceanic Stratovolcano", page 31
120. ^ IGME "Mapa Geológico Continuo de España" [Continuous Geological Map of Spain]. https://hub.arcgis.com/maps/IGME::mapa-geológico-continuo-de-españa-a-escala-1-50-000-continuous-geological-map-of-spain-scale-1-50-000/explore?location=28.041205,-17.189254,13.43 Retrieved 2024-08-21.
121. ^ Ancochea, E.; Hernán, F.; Huertas, M.J.; Brändle, J.L.; Herrera, R. (2006) "A new chronostratigraphical and evolutionary model for La Gomera: Implications for the overall evolution of the Canarian Archipelago", Journal of Volcanology and Geothermal Research, volume 157, pages 271–293, doi:10.1016/j.jvolgeores.2006.04.001
122. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 185-187
123. ^ Paris, R. et al. (2005) "Volcanic and morphological evolution of La Gomera (Canary Islands), based on new K–Ar ages and magnetic stratigraphy: implications for oceanic island evolution", Journal of the Geological Society, volume 162, pages 501-512, doi:10.1144/0016-764904-055
124. ^ Ancochea, E.; Hernán, F.; Huertas, M.J.; Brändle, J.L.; Herrera, R. (2006) "A new chronostratigraphical and evolutionary model for La Gomera: Implications for the overall evolution of the Canarian Archipelago", Journal of Volcanology and Geothermal Research, volume 157, pages 271–293, doi:10.1016/j.jvolgeores.2006.04.001
125. ^ Vera, J.A. (editor) (2004) "Geología de España", Madrid, SGE-IGME (in Spanish), pages 637-642
126. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 189
127. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands"’, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 211
128. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 9-13, 190
129. ^ Guillou, H.; Carracedo, J.C.; Paris, R.; Pérez Torrado, F.J. (2004) "Implications for the early shield-stage evolution of Tenerife from K/Ar ages and magnetic stratigraphy", Earth and Planetary Science Letters, volume 222, pages 599–614, doi:10.1016/j.epsl.2004.03.012
130. ^ Guillou, H.; Carracedo, J.C.; Pérez Torrado, F.J. (2005) "Volcanic and morphological evolution of La Gomera (Canary Islands), based on new K-Ar ages and magnetic stratigraphy: Implications for oceanic island evolution", Journal of the Geological Society, volume 162, issue 3, pages 501-512
131. ^ Ancochea, E.; Hernán, F.; Huertas, M.J.; Brändle, J.L.; Herrera, R. (2006) "A new chronostratigraphical and evolutionary model for La Gomera: Implications for the overall evolution of the Canarian Archipelago", Journal of Volcanology and Geothermal Research, volume 157, pages 271–293, doi:10.1016/j.jvolgeores.2006.04.001
132. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 190-193
133. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136
134. ^ Ancochea, E.; Hernán, F.; Huertas, M.J.; Brändle, J.L.; Herrera, R. (2006) "A new chronostratigraphical and evolutionary model for La Gomera: Implications for the overall evolution of the Canarian Archipelago", Journal of Volcanology and Geothermal Research, volume 157, pages 271–293, doi:10.1016/j.jvolgeores.2006.04.001
135. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 192
136. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands"’, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 193
137. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136
138. ^ Anguita, F. and Hernán, F. (2000) "The Canary Islands origin: a unifying model", Journal of Volcanology and Geothermal Research, volume 103, pages 1-26
139. ^ Acosta, J. et al. (2003) "Geologic evolution of the Canarian Islands of Lanzarote, Fuerteventura, Gran Canaria and La Gomera and comparison of landslides at these islands with those at Tenerife, La Palma and El Hierro", Marine Geophysical Researches, volume 24, issue 1–2, pages 1–40, doi:10.1007/s11001-004-1513-3
140. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 194
141. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 194
142. ^ Ancochea, E.; Hernán, F.; Huertas, M.J.; Brändle, J.L.; Herrera, R. (2006) "A new chronostratigraphical and evolutionary model for La Gomera: Implications for the overall evolution of the Canarian Archipelago", Journal of Volcanology and Geothermal Research, volume 157, pages 271–293, doi:10.1016/j.jvolgeores.2006.04.001
143. ^ Carracedo, J.C; Pérez Torrado, F.J.; Meco, J. "La Gea: Análisis de una isla en estado post-erosivo de desarrollo", chapter in Octavio Rodríguez Delgado (editor) (2005) "Patrimonio natural de la isla de Fuerteventura", Centro Cultura Popular Canaria, ISBN 84-7926-391-1, pages 27-44 (in Spanish)
144. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands"’, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 183
145. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
146. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
147. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 198
148. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
149. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
150. ^ Day J.M.D., et al. (2010) "Evidence for distinct proportions of subducted oceanic crust and lithosphere in HIMU-type mantle beneath El Hierro and La Palma, Canary Islands". Geochimica Cosmochimica Acta, doi:10.1016/j.gca.2010.08.021
151. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 200
152. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
153. ^ Carracedo, J.C., Badiola, E.R, Guillou, H., de la Nuez, J. and Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
154. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, pages 193–206
155. ^ Carracedo, J.C., Badiola, E.R, Guillou, H., de la Nuez, J. and Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
156. ^ García-Romero, E., Vegas, J., Baldonedo, J.L. and Marfil, R. (2005) "Clay minerals as alteration products in basaltic volcaniclastic deposits of La Palma (Canary Islands, Spain)", Sedimentary Geology, volume 174, pages 237–253, doi:10.1016/j.sedgeo.2004.12.007
157. ^ Day, S.J; Carracedo, J.C; Guillou, H.; Gravestock, P. (1999) "Recent structural evolution of the Cumbre Vieja volcano, La Palma, Canary Islands: volcanic rift zone reconfiguration as a precursor to volcano flank instability?", Journal of Volcanology and Geothermal Research, volume 94, pages 135-167
158. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 106, 107, 116
159. ^ Groom, S.; Barfod, D.N.; Millar, I.; Downes, H. (2023) "The Cumbre Nueva collapse (La Palma, Canary Islands): New age determinations and evidence of an isotopic excursion", Journal of Volcanology and Geothermal Research, volume 433, (January 2023), article 107708, doi:10.1016/j.jvolgeores.2022.107708
160. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
161. ^ Groom, S.; Barfod, D.N.; Millar, I.; Downes, H. (2023) "The Cumbre Nueva collapse (La Palma, Canary Islands): New age determinations and evidence of an isotopic excursion", Journal of Volcanology and Geothermal Research, volume 433, (January 2023), article 107708 doi:10.1016/j.jvolgeores.2022.107708
162. ^ Carracedo, J.C; Day, S J.; Guillou, H.; Pérez Torrado, F.J. (1999) "Giant Quaternary landslides in the evolution of La Palma and El Hierro", Journal of Volcanology and Geothermal Research, volume 94, pages 169-190
163. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
164. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
165. ^ Isaac Newton Group of Telescopes "The Geology of La Palma", https://www.ing.iac.es/PR/lapalma/geology.html Retrieved on 26 May 2002.
166. ^ Carracedo, J.C. "Structural Collapses in the Canary Islands", Chapter 24 in Guttiérez, F. and Guttiérez, M. (editors) (2014) "Landscapes and Landforms of Spain", Dordrecht, Springer Science+Business Media, page 295
167. ^ Groom, S.; Barfod, D.N.; Millar, I.; Downes, H. (2023) "The Cumbre Nueva collapse (La Palma, Canary Islands): New age determinations and evidence of an isotopic excursion", Journal of Volcanology and Geothermal Research, volume 433, (January 2023), article 107708, doi:10.1016/j.jvolgeores.2022.107708
168. ^ Groom, S.; Barfod, D.N.; Millar, I.; Downes, H. (2023) "The Cumbre Nueva collapse (La Palma, Canary Islands): New age determinations and evidence of an isotopic excursion", Journal of Volcanology and Geothermal Research, volume 433, (January 2023), article 107708, doi:10.1016/j.jvolgeores.2022.107708
169. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
170. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
171. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 115
172. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 104
173. ^ Carracedo, J.C. "Structural Collapses in the Canary Islands", Chapter 24 in Guttiérez, F. and Guttiérez, M. (editors) (2014) "Landscapes and Landforms of Spain", Dordrecht, Springer Science+Business Media, page 302
174. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 120
175. ^ Demeny, A. et al. "Plume-related stable isotope compositions and fluid–rock interaction processes in the Basal Complex of La Palma, Canary Islands, Spain" In: Coltorti, M. and Grégoire, M. (editors) (2008) "Metasomatism in Oceanic and Continental Lithospheric Mantle". Geological Society of London Special Publication 293, pages 155–175, ISSN 0305-8719, doi:10.1144/SP293.8
176. ^ Schmincke, H-U. (2004) "Volcanism", Berlin, Springer-Verlag, ISBN 3-540- 43650-2, page 147.
177. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
178. ^ Day, S.J; Carracedo, J.C; Guillou, H.; Gravestock, P. (1999) "Recent structural evolution of the Cumbre Vieja volcano, La Palma, Canary Islands: volcanic rift zone reconfiguration as a precursor to volcano flank instability?", Journal of Volcanology and Geothermal Research, volume 94, pages 135-167
179. ^ Spain Volcanoes – Smithsonian Institution Global Volcanism Program, https://volcano.si.edu/volcanolist_countries.cfm?country=Spain ; retrieved 15 July 2024
180. ^ Praegel, N.-O. and Holm, P.M. (2006) "Lithospheric contributions to high-MgO basanites from the Cumbre Vieja Volcano, La Palma, Canary Islands and evidence for temporal variation in plume influence", Journal of Volcanology and Geothermal Research, volume 149, pages 213– 239, doi:10.1016/j.jvolgeores.2005.07.019
181. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
182. ^ La Palma - Eruption history ; Smithsonian Institution Global Volcanism Program ; https://volcano.si.edu/volcano.cfm?vn=383010 ; retrieved 8 November 2023.
183. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 107
184. ^ Day, S.J; Carracedo, J.C; Guillou, H.; Gravestock, P. (1999) "Recent structural evolution of the Cumbre Vieja volcano, La Palma, Canary Islands: volcanic rift zone reconfiguration as a precursor to volcano flank instability?", Journal of Volcanology and Geothermal Research, volume 94, pages 135-167
185. ^ Ward, S.N; Day, S.J. (2001) "Cumbre Vieja Volcano: potential collapse and tsunami at La Palma, Canary Islands", Geophysical Research Letters, 28-17, pages 3397-3400
186. ^ Ward, S.N; Day, S. (December 2005) "Tsunami Thoughts", Recorder, volume 30, issue 10, pages 38-44, Canadian Society of Exploration Geophysicists https://csegrecorder.com/articles/view/tsunami-thoughts
187. ^ BBC2 TV (12 October 2000) "Mega-tsunami:Wave of Destruction", Horizon, transcript, https://www.bbc.co.uk/science/horizon/2000/mega_tsunami_transcript.shtml ; retrieved 28 July 2024
188. ^ Carracedo, J.C. "Structural Collapses in the Canary Islands", Chapter 24 in Guttiérez, F. and Guttiérez, M. (editors) (2014) "Landscapes and Landforms of Spain", Dordrecht, Springer Science+Business Media, pages 302-303
189. ^ Carracedo, J.C.; Troll, V.R.; Zaczek, K.; Rodríguez-González, A.; Soler, V.; Deegan, F.M. (2015) "The 2011–2012 submarine eruption off El Hierro, Canary Islands: New lessons in oceanic island growth and volcanic crisis management", Earth-Science Reviews, volume 150, pages 168–200, doi:10.1016/j.earscirev.2015.06.007
190. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 44
191. ^ Hernández Ramos, W.; Ortega, V.; Przeor, M.; Pérez, N.M.; Hernández, P.A. "Volcanology of Recent Oceanic Active Island" in Dóniz-Páez, J.; Pérez, N.M. (editors) (2023) "El Hierro Island Global Geopark", doi:10.1007/978-3-031-07289-5_2 , ISBN 978-3-031-07288-8, Springer, page 25
192. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 65
193. ^ Lopez, C. et al. (2012) "Monitoring the volcanic unrest of El Hierro (Canary Islands) before the onset of the 2011–2012 submarine eruption", Geophysical Research Letters, volume 39, L13303, doi:10.1029/2012GL051846
194. ^ Hernández Ramos, W.; Ortega, V.; Przeor, M.; Pérez, N.M.; Hernández, P.A. "Volcanology of Recent Oceanic Active Island" in Dóniz-Páez, J.; Pérez, N.M. (editors) (2023) "El Hierro Island Global Geopark", doi:10.1007/978-3-031-07289-5_2, ISBN 978-3-031-07288-8 , Springer, pages 25 and 26
195. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
196. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
197. ^ Montesinos, F.G.; Arnoso, J.; Benavent, M.; Vieira, R. (2006) "The crustal structure of El Hierro (Canary Islands) from 3-D gravity inversion", Journal of Volcanology and Geothermal Research, volume 150, pages 283–299
198. ^ Aulinas, M.; Domínguez, D.; Rodríguez-González, A.; Carmona, H.; Fernández-Turiel, J.L.; Pérez-Torrado, F.J.; Carracedo, J.C.; Arienzo, I; D’Antonio, M. (2019) "The Holocene volcanism at El Hierro: insights from petrology and geochemistry", Geogaceta, volume 65, pages 35-38
199. ^ Becerril, L.; Galve, J.P.; Morales, J.M.; Romero, C.; Sánchez, N; Martí, J.; Galindo, I. (2016) "Volcano-structure of El Hierro (Canary Islands)", Journal of Maps, volume 12, number S1, pages 43–52, doi:10.1080/17445647.2016.1157767
200. ^ Becerril, L.; Galindo, I.; Martí, J.; Gudmundsson, A. (2015) "Three-armed rifts or masked radial pattern of eruptive fissures? The intriguing case of El Hierro volcano (Canary Islands)", Tectonophysics, volumes 647–648, pages 33–47, doi:10.1016/j.tecto.2015.02.006
201. ^ Carracedo, J.C.; Pérez Torrado, F.J.; Rodríguez Badiola, E. "Cenozoic Volcanism in the Canary Islands: El Hierro" in Gibbons, W. and Moreno, T. (editors) (2002) "Geology of Spain", London, The Geological Society, ISBN 1-86239-110-6, pages 455–458
202. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
203. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
204. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
205. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 244
206. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 57–58
207. ^ Hoernle, K. and Carracedo, J.C. "Canary Islands, Geology" in Gillespie, R. and Clague, D. (editors) (2009) "Encyclopedia of Islands", page 136.
208. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 70–75.
209. ^ Becerril, L.; Galve, J.P.; Morales, J.M.; Romero, C.; Sánchez, N; Martí, J.; Galindo, I. (2016) "Volcano-structure of El Hierro (Canary Islands)", Journal of Maps, volume 12, number S1, pages 43–52, doi:10.1080/17445647.2016.1157767
210. ^ Aulinas, M.; Domínguez, D.; Rodríguez-González, A.; Carmona, H.; Fernández-Turiel, J.L.; Pérez-Torrado, F.J.; Carracedo, J.C.; Arienzo, I; D’Antonio, M. (2019) "The Holocene volcanism at El Hierro: insights from petrology and geochemistry", Geogaceta, volume 65, pages 35-38
211. ^ Becerril, L.; Galve, J.P.; Morales, J.M.; Romero, C.; Sánchez, N; Martí, J.; Galindo, I. (2016) "Volcano-structure of El Hierro (Canary Islands)", Journal of Maps, volume 12, number S1, pages 43–52, doi:10.1080/17445647.2016.1157767
212. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 48.
213. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
214. ^ Becerril, L.; Galve, J.P.; Morales, J.M.; Romero, C.; Sánchez, N; Martí, J.; Galindo, I. (2016) "Volcano-structure of El Hierro (Canary Islands)", Journal of Maps, volume 12, number S1, pages 43–52, doi:10.1080/17445647.2016.1157767
215. ^ Carracedo, J. C.; Troll, V.R.; Zaczek, K.; Rodríguez-González, A.; Soler, V.; Deegan, F. M. (2015) "The 2011–2012 submarine eruption off El Hierro, Canary Islands: New lessons in oceanic island growth and volcanic crisis management", Earth-Science Reviews, volume 150, pages 168–200, doi:10.1016/j.earscirev.2015.06.007
216. ^ Carracedo, J.C.; Badiola, E.R.; Guillou, H.; de la Nuez, J.; Pérez Torrado, F.J. (2001) "Geology and Volcanology of La Palma and El Hierro, Western Canaries", Estudios Geologicos, volume 57, pages 175–273
217. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 54, 57, 58.
218. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 57.
219. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 57-58
220. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 57–58
221. ^ Carracedo, J.C; Day, S.J.; Guillou, H.; Pérez Torrado, F.J. (1999) "Giant Quaternary landslides in the evolution of La Palma and El Hierro, Canary Islands", Journal of Volcanology and Geothermal Research, volume 94, pages 169-190, doi:10.1016/S0377-0273(99)00102-X
222. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 57–58.
223. ^ Montesinos, F.G.; Arnoso, J.; Benavent, M.; Vieira, R. (2006) "The crustal structure of El Hierro (Canary Islands) from 3-D gravity inversion", Journal of Volcanology and Geothermal Research, volume 150, pages 283–299
224. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 247
225. ^ Carracedo, J.C. and Day, S. (2002) "Canary Islands", Harpenden, Terra Publishing, ISBN 1-903544-07-6, page 247
226. ^ Becerril, L. et al. (2016) "Geochronological constraints on the evolution of El Hierro (Canary Islands)", Journal of African Earth Sciences, volume 113, pages 88–94, doi:10.1016/j.jafrearsci.2015.10.012
227. ^ Risica, G. et al. (2022) "Reconstruction of the subaerial Holocene volcanic activity through paleomagnetic and 14C dating methods: El Hierro (Canary Islands)", Journal of Volcanology and Geothermal Research, volume 425, article 107526, doi:10.1016/j.jvolgeores.2022.107526
228. ^ Lopez, C. et al. (2012) "Monitoring the volcanic unrest of El Hierro (Canary Islands) before the onset of the 2011–2012 submarine eruption", Geophysical Research Letters, volume 39, L13303, doi:10.1029/2012GL051846
229. ^ Carracedo, J.C.; Troll, V.R.; Zaczek, K.; Rodríguez-González, A.; Soler, V.; Deegan, F.M. (2015) "The 2011–2012 submarine eruption off El Hierro, Canary Islands: New lessons in oceanic island growth and volcanic crisis management", Earth-Science Reviews, volume 150, pages 168–200, doi:10.1016/j.earscirev.2015.06.007
230. ^ "El volcán submarino de El Hierro, bautizado oficialmente como "Tagoro"". ["The underwater volcano of El Hierro, officially named 'Tagoro'"]. La Vanguardia. 30 May 2016. (in Spanish) https://www.lavanguardia.com/local/canarias/20160530/402148484233/el-volcan-submarino-de-el-hierro-bautizado-oficialmente-como-tagoro.html
231. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 66.
232. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, pages 9–11
233. ^ van den Bogaard, P. (2013) "The origin of the Canary Island Seamount Province - New ages of old seamounts", Scientific Reports, volume 3, article 2107, doi:10.1038/srep02107
234. ^ Earthquakes of the Canary Islands 1975–2023 – USGS Earthquake Catalog retrieved on 3 February 2024.
235. ^ Rihm, R.; Jacobs, C.L.; Krastel, S.; Schmincke, H-U.; Alibes, B. (1998) "Las Hijas Seamounts—the next Canary Island?", Terra Nova, volume 10, issue 3, doi:10.1046/j.1365-3121.1998.00176.x, pages 121–125
236. ^ Rihm, R.; Krastel, S; Shipboard Scientific Party (1997) "Cruise Report R.R.S. Charles Darwin Cruise 109, 25. Oct. 1997 - 19. Nov. 1997", British Oceanographic Data Centre, https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/cd109_1997.pdf
237. ^ van den Bogaard, P. (2013) "The origin of the Canary Island Seamount Province - New ages of old seamounts", Scientific Reports, volume 3, article 2107, doi:10.1038/srep02107
238. ^ van den Bogaard, P. (2013) "The origin of the Canary Island Seamount Province - New ages of old seamounts", Scientific Reports, volume 3, article 2107, doi:10.1038/srep02107
239. ^ a b González de Vallejoa, L.I.; Tsigé, M.; Cabrera, L. (2005). "Paleoliquefaction features on Tenerife (Canary Islands) in Holocene sand deposits" (PDF). Engineering Geology. 76 (3–4): 179–190. Bibcode:2005EngGe..76..179G. doi:10.1016/j.enggeo.2004.07.006.
240. ^ Carracedo, J.C. and Troll, V.R. (editors) (2016) The Geology of the Canary Islands, Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 252
241. ^ Gonzalez de Vallejo, L.I; et al.(2003) "Paleoearthquake evidence in Tenerife (Canary Islands) and possible seismotectonic sources", Marine Geophysical Researches, volume 24; pages 149–160, doi:10.1007/s11001-004-5883-3
242. ^ Earthquakes of the Canary Islands 1975–2023 – USGS Earthquake Catalog retrieved on 3 February 2024.
243. ^ M 5.4 - 28 km W of Frontera, Spain; USGS Earthquake Catalog https://earthquake.usgs.gov/earthquakes/eventpage/usc000lst3/technical Retrieved on 1 September 2024.
244. ^ Domínguez Cerdeña, I.; del Fresno, C.; Rivera, L. (2011) "New insight on the increasing seismicity during Tenerife's 2004 volcanic reactivation", Journal of Volcanology and Geothermal Research, volume 206, issues 1-2, pages 15–29, doi:10.1016/j.jvolgeores.2011.06.005
245. ^ Carracedo, J.C.; Troll, V.R.; Zaczek, K.; Rodríguez-González, A.; Soler, V.; Deegan, F.M. (2015) "The 2011–2012 submarine eruption off El Hierro, Canary Islands: New lessons in oceanic island growth and volcanic crisis management", Earth-Science Reviews, volume 150, pages 168–200, doi:10.1016/j.earscirev.2015.06.007
246. ^ Suarez, Borja (2021-09-19). "Lava shoots up from volcano on La Palma in Spain's Canary Islands". Reuters. Archived from the original on 22 September 2021. Retrieved 19 September 2021.
247. ^ "La Palma Update: The intensity of earthquakes has increased". Canarian Weekly. 19 September 2021. Archived from the original on 23 September 2021. Retrieved 20 September 2021.
248. ^ Instituto Geográfico Nacional (2 October 2021) "Noticias e informe mensual de vigilancia volcánica" ["News and monthly volcanic monitoring report"] (Archived copy) (in Spanish). Retrieved 17 September 2024.
249. ^ "La Palma registra un terremoto de 4,3: el más intenso desde el inicio de la actividad volcánica" [La Palma registers a 4.3 earthquake: the most intense since the beginning of volcanic activity]. rtve.es (in Spanish). 7 October 2021. Retrieved 11 October 2021.
250. ^ Galindo, I.; Romero, C.; Martín-González, E.; Vegas, J.; Sánchez, N. (2021). "A Review on Historical Tsunamis in the Canary Islands: Implications for Tsunami Risk Reduction". Geosciences. 11 (5) 222: 222. Bibcode:2021Geosc..11..222G. doi:10.3390/geosciences11050222.
251. ^ Santos Coello, B.; Ríos Mesa, D. (2023) "Physical Properties of the Canary Islands' Volcanic Pyroclastic Materials as Horticultural Substrates", Horticulturae, volume 9, article 414, doi:10.3390/horticulturae9040414
252. ^ The Village of El Palmar in Tenerife. Retrieved 12 September 2024.
253. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 288
254. ^ Bryan, S.E.; Martí, J.; Leosson, M. (2002) "Petrology and Geochemistry of the Bandas del Sur Formation, Las Cañadas Edifice, Tenerife (Canary Islands)", Journal of Petrology, volume 43, issue 10, pages 1815–1856
255. ^ Valido, J.A.; Cáceres, J.M.; Sousa, L. (2023) "A characterisation study of ignimbrites of Tenerife Island employed as building stone", Environmental Earth Sciences, volume 82, article 280, doi:10.1007/s12665-023-10957-5
256. ^ Mateu, J.C. (3 September 2017) "Un museo para quedarse de piedra" (in Spanish) [A museum to be stunned by], Diario de Avisos, Retrieved on 2 September 2024
257. ^ Valido, J.A.; Cáceres, J.M.; Sousa, L. (2023) "A characterisation study of ignimbrites of Tenerife Island employed as building stone", Environmental Earth Sciences, volume 82, article 280, doi:10.1007/s12665-023-10957-5
258. ^ European Meeting on Chemical Industry and Environment (2003) "Chemical industry and environment IV", edited by Agustín Macías Machín and Jesús Joaquín Umbría Ramos, Las Palmas de Gran Canaria : Universidad, Grupo de Energía y Medio Ambiente, volume 1, pages 21-32 https://accedacris.ulpgc.es/handle/10553/76559 ; retrieved 8 September 2024
259. ^ Usos y tradiciones (in Spanish), Gran Canaria Reserva de la Biosfera, Cabildo de Gran Canaria. Retrieved on 12 September 2024.
260. ^ Dill, H.G.; Buzatu, A.; Balaban, S-I.; Rüsenberg, K.A. (2023) "A mineralogical-geomorphological terrain analysis of hotspot volcanic islands - The missing link between carbonatite- and pegmatite Nb-F-Zr-Li-Be-bearing REE deposits and new tools for their exploration (Canary Islands Archipelago, Spain)", Ore Geology Reviews, volume 163, article 105702, doi:10.1016/j.oregeorev.2023.105702
261. ^ Santamarta, J.C.; Pacheco, G.L.; Rodríguez-Martín, J.; del Cristo Expósito, M.; García-Gil, A.; Cruz-Pérez, N. (2023) "Geothermal Supply System for a Winery on a Volcanic Island (Lanzarote, Canary Islands)" In: Çiner, A., et al. "Recent Research on Sedimentology, Stratigraphy, Paleontology, Tectonics, Geochemistry, Volcanology and Petroleum Geology" (Mediterranean Geosciences Union conference 2021), Advances in Science, Technology & Innovation, Springer, doi:10.1007/978-3-031-43222-4_29
262. ^ García-Gil, A., et al. (2024) "El proyecto SAGE4CAN y su impulso a la transición hacia energías limpias en las Islas Canarias mediante la Geotermia y el conocimiento hidrogeológico", https://www.interempresas.net/ObrasPublicas/Articulos/539844-proyecto-SAGE4CAN-impulso-transicion-hacia-energias-limpias-Islas-Canarias-mediante.html , retrieved 08 September 2024
263. ^ García de la Noceda, C.; de Santiago, C. (2022) "High enthalpy resources in Canary Islands: Geo-Energy Research Group", 1st Scientific-Technical Conference of the Geological and Mining Institute of Spain-National Center (IGME, CSIC), page 113
264. ^ Cariaga, C. (27 May 2024) "IGME, ULL collaborate on shallow geothermal research in Canary Islands", ThinkGeoEnergy, retrieved 17 September 2024
265. ^ Gobierno de Canarias [Government of the Canary Islands] (26 July 2023) "Energía renovable geotérmica", CanariWiki (in Spanish) Gobierno de Canarias [Government of the Canary Islands], https://www3.gobiernodecanarias.org/medusa/wiki/index.php?title=Energía_renovable_geotérmica&oldid=16073 ; Retrieved 8 September 2024
266. ^ Martin, C. (27 July 1986) "Inversión de 1.000 millones de pesetas para impermeabilizar una laguna en La Palma" [Investment of 1,000 million pesetas to waterproof a lagoon in La Palma], El País, https://elpais.com/diario/1986/07/28/espana/522885615_850215.html# (in Spanish) ; retrieved 16 September 2024
267. ^ BALTEN (Balsas de Tenerife - Entidad Pública Empresarial, Cabildo de Tenerife [Reservoirs of Tenerife - Public Business Entity, Council of Tenerife]) "BALTEN - 20 Años", [BALTEN - 20 Years], page 36, balten.es, https://www.balten.es/uploads/articulos/18/documentos/61eca14c-b2bf-488d-9f84-dd7e941208a1.pdf ; (in Spanish) retrieved 17 September 2024
268. ^ "Red Canaria de Espacios Naturales Protegidos", [Canary Islands Network of Protected Natural Areas] (in Spanish) CanariWiki, Gobierno de Canarias [Government of the Canary Islands], retrieved 22 September 2024
269. ^ El Hierro Natural Parks, retrieved 22 September 2024
270. ^ Tenerife Natural Parks, retrieved 22 September 2024
271. ^ Natural Parks in La Gomera, retrieved 22 September 2024
272. ^ Dóniz-Páez, J.; Beltrán-Yanes, E.; Becerra-Ramírez, R.; Pérez, N.M.; Hernández, P.A.; Hernández, W. (2020) "Diversity of Volcanic Geoheritage in the Canary Islands, Spain", Geosciences, volume 10, article 390, doi:10.3390/geosciences10100390
273. ^ Dóniz-Páez, J.; Hernández, P.A.; Pérez, N.M.; Hernández, W.; Márquez, A. (2020) "TFgeotourism: A Project to Quantify, Highlight, and Promote the Volcanic Geoheritage and Geotourism in Tenerife (Canary Islands, Spain)"
274. ^ TFGeoturismo (in Spanish); retrieved on 1 October 2024
275. ^ Dóniz-Páez. J.; Pérez, N.M.; Becerra-Ramírez, R.; Hernández-Ramos, W. (2024) "Geotourism on an active volcanic island (La Palma, Canary Islands, Spain)", Miscellanea Geographica, volume 28, number 2, pages 47-53, DOI=10.2478/mgrsd-2023-0032
276. ^ Martínez del Olmo, W. (2020) "The Fúster Casas Sedimentary Trough (East of the Lanzarote and Fuerteventura Canary Islands, Spain)", Revista de la Sociedad Geológica de España, volume 3, issue 1, pages 27-42
277. ^ Carracedo, J.C. and Troll, V.R. (2016) "The Geology of the Canary Islands", Amsterdam, Elsevier, ISBN 978-0-12-809663-5, page 7
278. ^ Martínez del Olmo, W. (2019) "The Spanish Petroleum Systems and the Overlooked Areas and Targets", Boletín Geológico y Minero, volume 130, issue 2, pages 289–315, doi:10.21701/bolgeomin.130.2.005
279. ^ Martínez del Olmo, W. (2020) "The Fúster Casas Sedimentary Trough (East of the Lanzarote and Fuerteventura Canary Islands, Spain)", Revista de la Sociedad Geológica de España, volume 3, issue 1, pages 27–42

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