South Småland peneplain

300px|thumb|upright=1.35|View of the South Småland peneplain at [[Store Mosse National Park. Note the residual hill or inselberg in the background.]] The South Småland peneplain (Swedish: Sydsmåländska peneplanet) is a large flattish erosion surface, a peneplain, formed during the Tertiary, covering large swathes of southern Småland and nearby areas in Southern Sweden.[1][2] To the east the South Småland peneplain bounds with the Sub-Cambrian peneplain uphill across an escarpment.[3] While is almost as flat as the Sub-Cambrian peneplain the South Småland peneplain differs in that it contains far more residual hills and that it has never been covered by sedimentary rocks.[3][2] To the south and west (chiefly Halland and Blekinge) the peneplain transitions into Mesozoic-aged hilly surfaces.[2]

In a 2013 study the surface is described as extending over an altitude range of 100 to 150 meters above sea level,[2] while in a subsequent 2017 study the main surface is said to range from 175 to 125 m a.s.l. with a lower level at 100 m a.s.l. existing in near the Blekinge-Småland border.[4] The South Småland peneplain is the lowest surface in a piedmonttreppen or staircase of erosion surfaces that make up the South Swedish Dome. The level immediately above it is the 200 m peneplain, that is then followed by the 300 m peneplain and the crestal portion of the Sub-Cambrian peneplain.[4]

The western part of the peneplain is drained by the river Nissan while Bolmån drains the southwest. Mörrumsån drains eastern parts of peneplain.[3] It is possible that the Kvärkabäcken and Skäralid streams that traverses the Söderåsen horst in Scania are old antecedent rivers that once flowed through the South Småland peneplain.[5]

The existence of this plain was first noted by Sten De Geer in 1913 who termed it Smålands urbergslätt.[2]

## See also

* Norrland terrain

## References

1. ↑ Lidmar-Bergström, Karna. "Sydsmåländska peneplanet" (in sv). Cydonia Development. http://www.ne.se/uppslagsverk/encyklopedi/lång/sydsmåländska-peneplanet.
2. ↑ 2.0 2.1 2.2 2.3 2.4 Lidmar-Bergström, Karna; Bonow, Johan M.; Japsen, Peter (2013). "Stratigraphic Landscape Analysis and geomorphological paradigms: Scandinavia as an example of Phanerozoic uplift and subsidence". Global and Planetary Change 100: 153–171.
3. ↑ 3.0 3.1 3.2 Lidmar-Bergström (1988). "Denudation surfaces of a shield area in southern Sweden". Geografiska Annaler 70 A (4): 337–350.
4. ↑ 4.0 4.1 Lidmar-Bergström, Karna; Olvmo, Mats; Bonow, Johan M. (2017). "The South Swedish Dome: a key structure for identification of peneplains and conclusions on Phanerozoic tectonics of an ancient shield". GFF.
5. ↑ Lidmar-Bergström, Karna; Elvhage, Christian; Ringberg, Bertil (1991). "Landforms in Skåne, South Sweden". Geografiska Annaler: Series A, Physical Geography 73 (2): 61–91.

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Geology of Fennoscandia

Paleosurfaces|

* Borsu surface
* Hardangervidda
* Muddus plains
* Paleic surface
* Ostrobothnian Plain
* South Småland peneplain
* 300 m peneplain
* 200 m peneplain
* Strandflat
* Sub-Cambrian peneplain
* Sub-Mesozoic hilly relief

Sedimentary cover|

| Moraines|

* Billingen terminal moraine
* Pulju moraine
* Rogen moraine
* Salpausselkä
* Sevetti moraine
* Skövde terminal moraine
* Trollgarden
* Veiki moraine

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Sedimentary rock|

* Alum Shale Formation
* Hedmark Group
* Jotnian sedimentary rock
* Reusch's Moraine
* Visingsö Group

Structures|

| Faults and shear zones|

* Burträsk Fault
* Iapetus Suture
* Lainio Fault
* Nordfjord-Sogn Detachment
* Pärvie Fault
* Protogine Zone
* Sorgenfrei-Tornquist Zone
* South Finland Shear Zone

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Large impact craters|

* Dellen
* Gardnos crater
* Granby crater
* Hummeln structure
* Lappajärvi
* Lockne crater
* Lumparn
* Mien
* Ritland crater
* Siljan Ring
* Sääksjärvi
* Söderfjärden
* Suvasvesi
* Tvären

Morphostrucures|

* Central Swedish lowland
* Gulf of Bothnia rift
* Lake Inari graben
* Lake Ladoga graben
* Lofoten horst
* Muhos Graben
* Norrland terrain
* Omberg horst
* Oslo Graben
* Scandinavian Mountains
* Scanian horsts
* South Swedish Dome
* Vättern graben
* White Sea Rift System

Lesser igneous provinces|

* Alnö Complex
* Central Skåne Volcanic Province
* Fen Complex
* Kattsund-Koster dyke swarm
* Kola Alkaline Province
* Norra Kärr
* Rapakivi granites
* Särna Alkaline Complex
* Satakunta dyke swarms

Provinces and orogens|

* Belomorian Province
* Blekinge-Bornholm Province
* Kola Province
* Scandinavian Caledonides
* Svecofennian Province
* Sveconorwegian Province
* Transscandinavian Igneous Belt
* Timanide Orogen
* Western Gneiss Region

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