Gulf of Mexico

Marginal sea of the Atlantic Ocean

Gulf of Mexico

Golfo de México[a]

Bathymetry of the Gulf of Mexico

Location| American Mediterranean Sea
Coordinates| 25°N 90°W﻿ / ﻿25°N 90°W﻿ / 25; -90﻿ (Gulf of Mexico)
River sources| Rio Grande, Mississippi River, Mobile River, Panuco River, Jamapa River, Pascagoula River, Tecolutla River, Usumacinta River, Apalachicola River
Ocean/sea sources| Atlantic Ocean, Caribbean Sea
Basin countries|

* Cuba
* Mexico
* United States of America

Max. width| 1,500 km (930 mi)
Surface area| 1,550,000 km2 (600,000 sq mi)
Average depth| 1,615 m (5,299 ft)[2]
Max. depth| 3,750 to 4,384 m (12,303 to 14,383 ft)[2]
Settlements| Veracruz, Houston, New Orleans, Corpus Christi, Tampa, Havana, Southwest Florida, Mobile, Gulfport, Matamoros, Brownsville, Tampico, Key West, Cabo Catoche / Cancún, Ciudad del Carmen, Coatzacoalcos, Panama City

The Gulf of Mexico (Spanish: Golfo de México) is an oceanic basin and a marginal sea of the Atlantic Ocean,[3][4] mostly surrounded by the North American continent.[5] It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southwest and south by the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and Quintana Roo; and on the southeast by Cuba. The coastal areas along the Southern U.S. states of Texas, Louisiana, Mississippi, Alabama, and Florida, which border the Gulf on the north, are occasionally referred to as the "Third Coast" of the United States (in addition to its Atlantic and Pacific coasts), but more often as "the Gulf Coast".

The Gulf of Mexico took shape about 300 million years ago (mya) as a result of plate tectonics.[6] The Gulf of Mexico basin is roughly oval and is about 810 nautical miles (1,500 kilometers; 930 miles) wide. Its floor consists of sedimentary rocks and recent sediments. It is connected to part of the Atlantic Ocean through the Straits of Florida between the U.S. and Cuba, and with the Caribbean Sea via the Yucatán Channel between Mexico and Cuba. Because of its narrow connection to the Atlantic Ocean, the gulf has very small tidal ranges.

The size of the gulf basin is about 1.6 million square kilometers (620,000 square miles). Almost half of the basin consists of shallow continental shelf waters. The volume of water in the basin is roughly 2.4 million cubic kilometers (580 thousand cubic miles).[7] The gulf is one of the most important offshore petroleum production regions in the world, making up 14% of the United States' total production.[8] Moisture from the Gulf of Mexico also contributes to weather across the United States, including severe weather in Tornado Alley.

## Name

[edit]

"Gulf of America" redirects here. For the Russian waters formerly known as the Gulf of America, see Nakhodka Bay. For the coastline along the southern U.S., see Gulf Coast of the United States.

See also: Gulf of Mexico naming controversy

As with the name of Mexico, the gulf's name is associated with the ethnonym Mexica, which refers to the Nahuatl-speaking people of the Valley of Mexico better known as the Aztecs.[9] In Aztec religion, the gulf was called Chalchiuhtlicueyecatl, or 'House of Chalchiuhtlicue', after the deity of the seas.[10] Believing that the sea and sky merged beyond the horizon, they called the seas ilhuicaatl, meaning 'sky water', contrasting them with finite, landlocked bodies of water, such as lakes.[11] The Maya civilization, which used the gulf as a major trade route, likely called the gulf nahá, meaning 'great water'.[12]

Up to 1530, European maps depicted the gulf, though left it unlabeled.[13] Hernán Cortés called it "Sea of the North" (Spanish: Mar del Norte) in his dispatches, while other Spanish explorers called it the "Gulf of Florida" (Golfo de Florida) or "Gulf of Cortés" (Golfo de Cortés).[13] A 1584 map by Abraham Ortelius also labeled it as the "Sea of the North" (Mare de Nort).[14] Other early European maps called it the "Gulf of St. Michael" (Latin: Sinus S. Michaelis),[15] "Gulf of Yucatán" (Golfo de Iucatan),[16] "Yucatán Sea" (Mare Iuchatanicum),[17] "Great Antillean Gulf" (Sinus Magnus Antillarum), "Cathayan Sea" (Mare Cathaynum), or "Gulf of New Spain" (Spanish: Golfo de Nueva España).[13] At one point, New Spain encircled the gulf, with the Spanish Main extending into what later became Mexico and the southeastern United States.[14]

An English nautical chart dated 1700 labels the body of water "the Great Bay of Mexico".

An English nautical chart dated 1775 labels it "the Bay of Mexico", now glossing "Mexico" as an alternative name for New Spain.

The name "Gulf of Mexico" (Spanish: golfo de México; French: golphe du Mexique, later golfe du Mexique) first appeared on a world map in 1550 and a historical account in 1552.[13] As with other large bodies of water, Europeans named the gulf after Mexico, land of the Mexica, because mariners needed to cross the gulf to reach that destination.[18] This name has been the most common name since the mid-17th century,[13][19][20] when it was still considered a Spanish sea.[21] French Jesuits used this name as early as 1672.[22] In the 18th century, Spanish admiralty charts similarly labeled the gulf as "Mexican Cove" or "Mexican Sound" (Ensenada Mexicana or Seno Mexicano).[13] Until the Republic of Texas broke away from Mexico in 1836, Mexico's coastal boundary extended eastward along the gulf to present-day Louisiana.[12]

Among the other languages of Mexico, the gulf is known as Ayollohco Mexihco in Nahuatl, u golfoil México in Yucatec Maya, and golfo yu'un México in Tzotzil.

U.S. Geological Survey map, February 2025

On January 20, 2025, United States president Donald Trump signed an executive order directing federal agencies to adopt the name Gulf of America for the gulf waters bounded by the U.S.[23][24][25][b] Although there is no formal protocol on the general naming of international waters, Gulf of Mexico is officially recognized by the International Hydrographic Organization,[29][30] which seeks to standardize the names of international maritime features for certain purposes[31] and counts all three countries adjacent to the gulf as member states.[32] Major online map platforms and several U.S.-based media outlets voluntarily adopted the change.[33][34][35] Mexican president Claudia Sheinbaum objected to the declaration of a name change.[36][37] Certain U.S. Gulf Coast state governments, including those of Louisiana and Florida, have accepted the change.[38] Implementation of the executive order has sparked an ongoing naming dispute.

## Extent

[edit]

The Harbor at Galveston, by Verner Moore White (1863–1923)

The International Hydrographic Organization publication Limits of Oceans and Seas[c] defines the southeast limit of the Gulf of Mexico as:[30]

> A line joining Cape Catoche Light (21°37′N 87°04′W﻿ / ﻿21.617°N 87.067°W﻿ / 21.617; -87.067) with the Light on Cape San Antonio in Cuba, through this island to the meridian of 83°W and to the Northward along this meridian to the latitude of the South point of the Dry Tortugas (24°35′N), along this parallel Eastward to Rebecca Shoal (82°35′W) thence through the shoals and Florida Keys to the mainland at the eastern end of Florida Bay and all the narrow waters between the Dry Tortugas and the mainland being considered to be within the Gulf.

## Population

[edit]

The total population of the five U.S. states facing the gulf is 67 million people. Of these, a total of 15.8 million people live in the Gulf Coastal Region, in counties directly bordering the gulf.[39] The six Mexican states that face the gulf have a total population of 19.1 million people.[40] Three provinces of northwest Cuba, including Havana, border on the gulf, with a combined population of 3,211,000.[41] [42]

By 1975, 400 offshore drilling rigs in the gulf hosted a temporary population of more than 10,000 workers on any given day, who were rotated on a weekly staggered schedule.[43] Increasing automation later led to a decline in the offshore worker population.[44]

## Geology

[edit]

The consensus among geologists[6][45][46] is that before the late Triassic, the Gulf of Mexico did not exist. Before the late Triassic, the area consisted of dry land, which included continental crust that now underlies Yucatán, within the middle of the supercontinent Pangaea. This land lay south of a continuous mountain range that extended from north-central Mexico, through the Marathon Uplift in west Texas and the Ouachita Mountains of Oklahoma, and to Alabama where it linked directly to the Appalachian Mountains. It was created by the collision of continental plates that formed Pangaea. As interpreted by Roy Van Arsdale and Randel T. Cox, this mountain range was breached in the late Cretaceous by the formation of the Mississippi Embayment.[47][48]

Ship and oil rigs in the gulf

The rifting that created the basin was associated with zones of weakness within Pangaea, including sutures where the Laurentia, South American, and African plates collided to create it. First, there was a late Triassic–early Jurassic phase of rifting during which rift valleys formed and filled with continental red beds. Second, the continental crust was stretched and thinned as rifting progressed through early and middle Jurassic times. This thinning created a broad zone of transitional crust, which displays modest and uneven thinning with block faulting and a broad zone of uniformly thinned transitional crust, which is half the typical 40 km (25-mile) thickness of continental crust. At this time, rifting first created a connection to the Pacific Ocean across central Mexico and later eastwards to the Atlantic Ocean. This flooded the opening basin to create an enclosed marginal sea. The subsiding transitional crust was blanketed by the widespread deposition of Louann Salt and associated anhydrite evaporites. During the late Jurassic, continued rifting widened the basin and progressed to the point that seafloor spreading and formation of oceanic crust occurred. At this point, sufficient circulation with the Atlantic Ocean was established that the deposition of Louann Salt ceased.[45][46][49][50] Seafloor spreading stopped at the end of the Jurassic, about 145–150 mya.

Cantarell Field

During the late Jurassic through early Cretaceous, the basin experienced a period of cooling and subsidence of the crust underlying it. The subsidence resulted from crustal stretching, cooling, and loading. Initially, the crustal stretching and cooling combination caused about 5–7 km (3.1–4.3 miles) of tectonic subsidence of the central thin transitional and oceanic crust. The basin expanded and deepened because subsidence occurred faster than sediment could fill it.[45][50][51] Later, loading of the crust within the basin and adjacent coastal plain by the accumulation of kilometers of sediments during the rest of the Mesozoic and all of the Cenozoic further depressed the underlying crust to its current position about 10–20 km (6.2–12.4 miles) below sea level. Particularly during the Cenozoic, a time of relative stability for the coastal zones,[52] thick clastic wedges built out the continental shelf along the northwestern and northern margins of the basin.[45][50][51]

Sediment in the gulf

To the east, the stable Florida Platform was not covered by the sea until the latest Jurassic or the beginning of Cretaceous time. The Yucatán Platform was emergent until the mid-Cretaceous. After both platforms were submerged, the formation of carbonates and evaporites has delineated the geologic history of these two stable areas. Most of the basin was rimmed during the early Cretaceous by carbonate platforms, and its western flank was involved during the latest Cretaceous and early Paleogene periods in a compressive deformation episode, the Laramide Orogeny, which created the Sierra Madre Oriental of eastern Mexico.[2]

The Gulf of Mexico is 41% continental slope, 32% continental shelf, and 24% abyssal plain with the greatest depth of 12,467 feet in the Sigsbee Deep.[53] Seven main areas are given as:[citation needed]

* Gulf of Mexico basin contains the Sigsbee Deep and can be further divided into the continental rise, the Sigsbee Abyssal Plain, and the Mississippi Cone.
* Northeast Gulf of Mexico extends from a point east of the Mississippi River Delta near Biloxi to the eastern side of Apalachee Bay.
* South Florida Continental Shelf and Slope extends along the coast from Apalachee Bay to the Straits of Florida and includes the Florida Keys and Dry Tortugas.
* Campeche Bank extends from the Yucatán Straits in the east to the Tabasco–Campeche Basin in the west and includes Arrecife Alacran.
* Bay of Campeche is a bight extending from the western edge of Campeche Bank to the offshore regions east of Veracruz.
* Western Gulf of Mexico is located between Veracruz to the south and the Rio Grande to the north.
* Northwest Gulf of Mexico extends from Alabama to the Rio Grande.

### Brine pools

[edit]

A number of brine pools, sometimes called brine lakes, are known on the seafloor of the northern half of the Gulf of Mexico. Brine pools in the Gulf of Mexico range from just 1 metre (3 ft 3 in) across to 20 kilometres (12 mi) long. Brine is produced wherever the water of the Gulf comes in contact with the Louann Salt, a evaporite formation from the Jurassic period, along faults or in unconsolidated sediments. The Louann Salt extends under most of the continental shelf around the northern part of the Gulf from west of Florida to Texas. Under the pressure of overlaying sediments, the salt deforms and migrates, a process known as salt tectonics. Masses of salt may rise through overlaying sediments to form salt domes, or may be extruded along the Sigsbee Escarpment where the slope of the continental shelf exposes lower laying stata.[54][55]

The brines usually exceed 200 parts-per-thousand (ppt) of salt and are 25% or more denser than most seawater (average 35 ppt). The density difference inhibits mixing of the brine with other sea water, and the brine flows downslope and gathers in depressions in the gulf floor. Hydrocarbons and gas hydrates rising from salt diapirs may cause doming of the gulf floor, with the gas sometimes erupting strongly enough to leave a depression in the gulf floor surrounded by a rim, where brine may pool. The East Flower Garden Bank brine pool is in a crater formed by the collapsed cap of a salt dome. The circular pool covers 500 square metres (5,400 sq ft) with a maximum depth of 25 centimetres (9.8 in), and is 70 metres (230 ft) beneath the surface of the Gulf. It is anoxic and contain quantities of hydrogen sulfide and methane.[56]: 383

The brine pool known as GB425, which is 600 metres (2,000 ft) deep, is fed by a mud volcano. The temperature at the surface of the pool can vary from 6 to 48 °C (43 to 118 °F), and is on average 20 °C (68 °F) warmer than normal bottom temperatures. The brine pool known as GC233 is at a depth similar to that of GB425, 650 metres (2,130 ft) deep. The pool sits in a depression at the top of a mound and covers about 190 square metres (2,000 sq ft). While GC233 has a lower inflow of brine than GB425 and a temperature about 15 °C (59 °F) below that of GB425, the two pools share some similarities, such as a salinity of about 130 ppt, low sulfides, almost no sulfates, and high concentrations of hydrocarbons.[57]

The Orca Basin is 2,100 metres (6,900 ft) deep, and covers about 400 square kilometres (150 sq mi) with a maximum depth of 350 metres (1,150 ft). The large size is the result of the merger of several salt domes. Salinity in the pool increases gradually over a depth of 75 metres (246 ft), and reaches 300 ppt at depth, with zero dissolved oxygen.[57]: 383–384

A brine pool was discovered in 2014 on the sea floor at a depth of 3,300 feet (1,000 m) with a circumference of 100 feet (30 m) and depth of 12 feet (4 m), which is four to five times saltier than the surrounding water. The site cannot sustain any kind of life other than bacteria, mussels with a symbiotic relationship, tube worms, and certain kinds of shrimp. It has been called the "Jacuzzi of Despair" because it is warmer at 18 °C (65 °F) compared to the surrounding water at 4 °C (39 °F).[58]

## History

[edit]

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### Pre-Columbian

[edit]

As early as the Maya civilization, the Gulf of Mexico was used as a trade route off the coast of the Yucatán Peninsula and present-day Veracruz.[citation needed]

### Spanish exploration

[edit]

Although Europeans credited the Spanish voyage of Christopher Columbus with the discovery of the Americas, the ships in his four voyages did not reach the Gulf of Mexico. Instead, the Spanish sailed into the Caribbean around Cuba and Hispaniola.[59] The first alleged European exploration of the Gulf of Mexico was by Amerigo Vespucci in 1497. Vespucci is purported to have followed the coastal land mass of Central America before returning to the Atlantic Ocean via the Straits of Florida between Florida and Cuba. However, this first voyage of 1497 is widely disputed. Many historians doubt that it took place as described.[60] In his letters, Vespucci described this trip, and once Juan de la Cosa returned to Spain, a famous world map was produced.

In 1506, Hernán Cortés participated in the conquest of Hispaniola and Cuba, receiving a large estate of land and enslaving Indigenous people for his efforts. In 1510, he accompanied Diego Velázquez de Cuéllar, an aide to the governor of Hispaniola, on his expedition to conquer Cuba. In 1518, Velázquez put him in command of an expedition to explore and secure the interior of Mexico for colonization.

In 1517, Francisco Hernández de Córdoba discovered the Yucatán Peninsula. This was the first European encounter with an advanced civilization in the Americas, with solidly built buildings and complex social structures which they found comparable to those of the Old World. They also had reason to expect that this new land would have gold. All of this encouraged two further expeditions, the first in 1518 under the command of Juan de Grijalva, and the second in 1519 under the command of Hernán Cortés, which led to the Spanish exploration, military invasion, and ultimately settlement and colonization known as the Conquest of Mexico. Hernández did not live to see the continuation of his work: he died in 1517, the year of his expedition, as the result of the injuries and the extreme thirst suffered during the voyage, and disappointed in the knowledge that Velázquez had given precedence to Grijalva as the captain of the next expedition to Yucatán.

In 1523, a treasure ship was wrecked en route at Padre Island, Texas. When word of the disaster reached Mexico City, the viceroy requested a rescue fleet and sent Ángel de Villafañe from Mexico City, marching overland to find the treasure-laden vessels. Villafañe traveled to Pánuco and hired a ship to transport him to the site, which that community had already visited. He arrived in time to greet García de Escalante Alvarado (a nephew of Pedro de Alvarado), commander of the salvage operation, when Alvarado arrived by sea on July 22, 1554. The team laboured until September 12 to salvage the Padre Island treasure. This loss, combined with other ship disasters around the Gulf of Mexico, led to a plan for establishing a settlement on the northern Gulf Coast to protect shipping and rescue castaways more quickly. As a result, the expedition of Tristán de Luna y Arellano was sent and landed at Pensacola Bay on August 15, 1559.

On December 11, 1526, Charles V of the Holy Roman Empire granted Pánfilo de Narváez a licence to establish colonial settlements along the present-day Gulf Coast of the United States, known as the Narváez expedition. The contract gave him one year to gather an army, leave Spain, be large enough to found at least two towns of 100 people each, and garrison two more fortresses anywhere along the coast. On April 7, 1528, they spotted land north of what is now Tampa Bay. They turned south and traveled for two days, looking for a great harbour the master pilot Miruelo knew of. Sometime during these two days, one of the five remaining ships was lost on the rugged coast, but nothing else is known.

In 1697, French sailor Pierre Le Moyne d'Iberville was chosen by the Minister of Marine to lead an expedition to rediscover the mouth of the Mississippi River and to settle Louisiana, which French explorer Robert Cavelier de La Salle had named. The English coveted this region, however in 1682 it was named to honour King Louis XIV of France. D'Iberville's fleet sailed from Brest on October 24, 1698, reaching Santa Rosa Island near Pensacola; he sailed from there to Mobile Bay and explored Massacre Island. He anchored between Cat Island and Ship Island. On February 13, 1689, he went to ashore at what is now Biloxi, with his teenage brother Jean-Baptiste Le Moyne de Bienville,[61] and completed Fort Maurepas on the northeast side of the Bay of Biloxi on May 1. Three days later, d'Iberville sailed for France leaving his brother Jean-Baptiste as second in command.

The first permanent settlement, Fort Maurepas (now Ocean Springs, Mississippi), was founded in 1699 by d'Iberville. By then the French had also built a small fort at the mouth of the Mississippi at a settlement they named La Balise (or La Balize), "seamark" in French.[62]

## Geography

[edit]

Gulf beach near Sabine Pass

The Gulf of Mexico's eastern, northern, and northwestern shores lie along the US states of Florida, Alabama, Mississippi, Louisiana, and Texas. The US portion of the coastline spans 2,700 km (1,700 miles),[63] receiving water from 33 major rivers that drain 31 states and 2 Canadian provinces, and consisting of the coastline from the southern tip of Florida and the Florida Keys to the U.S.–Mexican border between Brownsville, Texas, and Matamoros, Tamaulipas.[64][30] The Mexican coastline spans 2,200 km (1,400 miles), consisting of the coastline from the US border to the Cabo Catoche Light (near Cancún) at the northern tip of the Yucatán Peninsula.[30][63] Cuba has only 100–400 km (60–250 miles) of official gulf coastline, along its northern land boundary.[65][66][dubious - discuss] The southwestern and southern shores of the gulf lie along the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and the northernmost tip of Quintana Roo. On its southeast quadrant, the gulf is bordered by Cuba. It supports major American, Mexican, and Cuban fishing industries. The outer margins of the wide continental shelves of Yucatán and Florida receive cooler, nutrient-enriched waters from the deep by a process known as upwelling, which stimulates plankton growth in the euphotic zone. This attracts fish, shrimp, and squid.[67] River drainage and atmospheric fallout from industrial coastal cities also provide nutrients to the coastal zone.

The Mississippi River watershed is the largest drainage basin of the Gulf of Mexico Watershed.[68]

The Gulf Stream, a warm Atlantic Ocean current and one of the strongest ocean currents known, originates in the gulf as a continuation of the Caribbean Current–Yucatán Current–Loop Current system. Other circulation features include a permanent cyclonic gyre in the Bay of Campeche and anticyclonic gyres, which are shed by the Loop Current and travel westwards, where they eventually dissipate. The Bay of Campeche constitutes a major arm of the Gulf of Mexico. Numerous bays and smaller inlets fringe the gulf's shoreline. Streams that empty into the gulf include the Mississippi River and the Rio Grande in the northern gulf and the Grijalva and Usumacinta rivers in the southern gulf. The land that forms the gulf's coast, including many long, narrow barrier islands, is almost uniformly low-lying and is defined by marshes, swamps, and stretches of sandy beach.

Map of northern part of Gulf of Mexico

The Gulf of Mexico is an excellent example of a passive margin. The continental shelf is quite wide at most points along the coast, notably at the Florida and Yucatán Peninsulas. The shelf is exploited for its oil through offshore drilling rigs, most of which are situated in the western gulf and the Bay of Campeche. Another important commercial activity is fishing; major catches include red snapper, amberjack, tilefish, swordfish, and various grouper, as well as shrimp and crabs. Oysters are also harvested on a large scale from many bays and sounds. Other important industries along the coast include shipping, petrochemical processing and storage, military use, paper manufacture, and tourism.

The shaded relief map of the Gulf of Mexico and the Caribbean area[69][70]

The gulf is considered aseismic; however, mild tremors have been recorded throughout history (usually 5.0 or less on the Richter magnitude scale). Interactions between sediment loading on the sea floor and adjustment by the crust may cause earthquakes.[71] On September 10, 2006, the U.S. Geological Survey National Earthquake Information Center reported that a magnitude 6.0 earthquake occurred about 400 km (250 miles) west-southwest of Anna Maria, Florida. The quake was reportedly felt from Louisiana to Florida. There were no reports of damage or injuries.[72][73] Items were knocked from shelves and seiches were observed in swimming pools in parts of Florida.[74] The earthquake was described by the USGS as an intraplate earthquake, the largest and most widely felt recorded in the past three decades in the region.[74] According to The Tampa Tribune on the following day, earthquake tremors were last felt in Florida in 1952, recorded in Quincy, 32 km (20 miles) northwest of Tallahassee.

### Maritime boundary delimitation agreements

[edit]

Cuba and Mexico: Exchange of notes constituting an agreement on the delimitation of the exclusive economic zone of Mexico in the sector adjacent to Cuban maritime areas (with map), of July 1976.

Cuba and United States: Maritime boundary agreement between the United States of America and the Republic of Cuba, of December 1977.

Mexico and United States: Treaty to resolve pending boundary differences and maintain the Rio Grande and Colorado River as the international boundary, of November 1970; Treaty on maritime boundaries between the United States of America and the United Mexican States (Caribbean Sea and Pacific Ocean), of May 1978, and treaty on the delimitation of the continental shelf in the western Gulf of Mexico beyond 200 nautical miles (370 km; 230 mi), of June 2000.

In December 2007, Mexico submitted information to the Commission on the Limits of the Continental Shelf (CLCS) regarding the extension of Mexico's continental shelf beyond 200 nautical miles.[75] Mexico sought an extension of its continental shelf in the Western Polygon based on international law, UNCLOS, and bilateral treaties with the United States, in accordance with Mexico's domestic legislation. In March 2009, the CLCS accepted Mexico's arguments for extending its continental shelf up to 350 nautical miles (650 km; 400 mi) into the Western Polygon. Since this would extend Mexico's continental shelf well into territory claimed by the United States, Mexico and the United States would need to enter a bilateral agreement based on international law that delimits their respective claims.

## Shipwrecks

[edit]

A ship now called the Mardi Gras sank around the early 19th century about 56 km (35 mi) off the coast of Louisiana in 1,200 m (3,900 feet) of water. The ship, whose real identity remains a mystery, is believed to have been a privateer or trader. The shipwreck lay forgotten at the bottom of the sea until it was discovered in 2002 by an oilfield inspection crew working for the Okeanos Gas Gathering Company (OGGC). In 2007, an expedition led by Texas A&M University and funded by OGGC under an agreement with the Minerals Management Service (now BOEM) was launched to undertake the deepest scientific archaeological excavation to that date to study the site on the seafloor and recover artifacts for public display in the Louisiana State Museum. Videos and a documentary about the project, Mystery Mardi Gras Shipwreck, was made by Nautilus Productions with help from BOEM, Texas A&M University, the Florida Public Archaeology Network[76] and Veolia Environmental.[77] about the project, short videos and video updates during the expedition. Video footage from the ROV was used in the documentary.[78]

On July 30, 1942, the SS Robert E. Lee, captained by William C. Heath, was torpedoed by the German submarine U-166. The steamship was en route to New Orleans, sailing southeast of the entrance to the Mississippi River; she was being escorted by USS PC-566, captained by Lieutenant Commander Herbert G. Claudius. The explosion destroyed the #3 hold; vented through the B and C decks; and damaged the engines, the radio compartment, and the steering gear. PC-566 dropped depth charges on a sonar contact, sinking U-166. The badly damaged Robert E. Lee first listed to port, then to starboard, and finally sank within about 15 minutes of the attack. One officer, nine crew members, and 15 passengers were lost. The passengers aboard Robert E. Lee were primarily survivors of previous torpedo attacks by German U-boats.[79] The wreck was discovered that also located the U-166. In 2001, the wrecks of U-166 and Robert E. Lee were found during the C & C Marine survey. The submarine was found in 5,000 feet (1,500 m) of water, about three km (1.9 miles) from where it had attacked the liner.[80]

## Biota

[edit]

Various biota include chemosynthetic communities near cold seeps and nonchemosynthetic communities such as bacteria and other micro-benthos, meiofauna, macrofauna, and megafauna (larger organisms such as crabs, sea pens, crinoids, demersal fish, cetaceans, and the extinct Caribbean monk seal) are living in the Gulf of Mexico.[81] Recently, resident Bryde's whales within the gulf were classified as an endemic, unique subspecies and making them as one of the most endangered whales in the world.[82] The Gulf of Mexico yields more fish, shrimp, and shellfish annually than the south and mid-Atlantic, Chesapeake, and New England areas combined.[7]

The Smithsonian Institution Gulf of Mexico holdings are expected to provide an important baseline of understanding for future scientific studies on the impact of the Deepwater Horizon oil spill.[83] In Congressional testimony, Jonathan Coddington, associate director of Research and Collections at the Smithsonian's National Museum of Natural History, provides a detailed overview of the Gulf collections and their sources which Museum staff have made available on an online map. The samples were collected for years by the former Minerals Management Service (renamed the Bureau of Ocean Energy Management, Regulation and Enforcement) to help predict the potential impacts of future oil/gas explorations. Since 1979, the specimens have been deposited in the national collections of the National Museum of Natural History.[84]

## Pollution

[edit]

Dead zone in the gulf, along the northern coastline from Louisiana through Texas

The major environmental threats to the gulf are agricultural runoff and oil drilling. There are 27,000 abandoned oil and gas wells beneath the gulf. These have generally not been checked for potential environmental problems.[85] In 1973 the United States Environmental Protection Agency prohibited the dumping of undiluted chemical waste by manufacturingsediment interests into the gulf, and the military confessed to similar behavior in waters off Horn Island.[86] Microplastics within semi-enclosed seas like the gulf have been reported in high concentrations and the gulf's first such study estimated concentrations that rival the highest globally reported.[87]

There are frequent "red tide" algae blooms[88] that kill fish and marine mammals and cause respiratory problems in humans and some domestic animals when the blooms reach close to shore. This has especially been plaguing the southwest and southern Florida coast, from the Florida Keys to north of Pasco County, Florida.

The gulf contains a hypoxic dead zone that runs east–west along the Texas–Louisiana coastline. In July 2008, researchers reported that between 1985 and 2008, the area roughly doubled in size.[89] It was 22,730 km (14,120 miles) in 2017, the largest ever recorded.[90] Poor agricultural practices in the northern portion of the Gulf of Mexico have led to a tremendous increase of nitrogen and phosphorus in neighboring marine ecosystems, which has resulted in algae blooms and a lack of available oxygen. Occurrences of virilization and estrogen suppression were observed as a result. A 2007 study of the Atlantic croaker found a disproportioned sex ratio of 61% males to 39% females in hypoxic sites. This was compared with a 52% to 48% male-female ratio found in reference sites, showing impaired reproductive output for fish populations inhabiting hypoxic coastal zones.[91]

### Oil spills

[edit]

Further information: Deepwater Horizon oil spill

According to the National Response Center, the oil industry has thousands of minor accidents annually in the Gulf of Mexico.[92] The gulf's largest oil spill to date began in June 1979, when the Ixtoc I oil platform in the Bay of Campeche suffered a blowout and a catastrophic explosion, and lasted until the well was finally capped in April 1980.

Deepwater Horizon in flames after the explosion, April 20, 2010

On April 20, 2010, the Deepwater Horizon oil platform, located in the Mississippi Canyon about 64 km (40 miles) off the Louisiana coast, suffered a catastrophic explosion and later sank.[93][85][d] Oil flowed from the wellhead, about 1.5 km (0.93 mi) below the surface on the ocean floor,[96] creating a slick that covered hundreds of square kilometers of ocean surface, threatening marine life, adjacent coastal wetlands, and the livelihoods of Gulf Coast shrimpers and fishermen.[97] Estimates of the daily flow jumped several times—on April 24, it was 160 cubic meters (1,000 bbl) by BP's estimate; on April 28, a NOAA scientist increased the estimate to 5,000 barrels (790 m3);[98][99] and on May 27 the USGS put the rate at 12,000–19,000 barrels per day (1,900–3,000 m3/d).[100] Final estimates suggested a leak of 62,000 barrels per day (9,900 m3/d), a scale that had been suggested by both independent observers and federal scientists early on, but official attempts to release modeling data had been suppressed by the White House Office of Management and Budget according to a report by the government commission investigating the response.[99][95]: 10 On July 15, BP announced that the leak had stopped. In July, BP agreed to pay $18.7 billion to the U.S. government, the states of Alabama, Florida, Louisiana, Mississippi, and Texas, as well as 400 local authorities. As of 2015[update], BP had spent $54 billion on cleanup, penalties, and to repair environmental and economic damage.[101]

On May 12, 2016, oil from subsea infrastructure on Shell's Brutus oil rig released 2,100 barrels of oil. This leak created a 5 to 34 km (3.1 to 21.1 mi) oil slick in the sea about 156 km (97 miles) south of Port Fourchon, Louisiana, according to the U.S. Bureau of Safety and Environmental Enforcement.[92][102]

## Meteorological significance

[edit]

Graph showing the overall water temperature of the Gulf between Hurricanes Katrina and Rita. Although Katrina cooled waters in its path by up to 4 °C (7.2 °F), they had rebounded by the time of Rita's appearance.

The gulf's warm sea surface temperatures can feed powerful, deadly, and destructive Atlantic hurricanes such as Hurricane Katrina in 2005. In the open Atlantic, a hurricane will draw up cool water from the depths, making it less likely that further hurricanes will follow (warm water being one of the preconditions necessary for their formation). However, the gulf is shallower; when a hurricane passes over, the water temperature may drop, but it soon rebounds enough to support another tropical cyclone.[103] From 1970 to 2020, surface temperatures warmed at about twice the rate observed for the global ocean surface.[104]

Moisture from the Gulf of Mexico is a primary factor for the development of tornadoes and other severe weather in Tornado Alley, a term used to describe an area of the United States that is one of the most tornado-prone areas in the world. Dry air from the Rocky Mountains converges with Gulf moisture in the area, which produces storms and supercells that produce some of the most violent tornadoes in the world.[105] A study published in the Journal of Climate by Dongmin Kim, Sang-Ki Lee, and Hosmay Lopez, found that the Madden–Julian oscillation strengthens the North American low-level jet, which increases the flow of Gulf moisture and atmospheric instability into the Central United States, furthering tornadogenesis in the region.[106]

## See also

[edit]

* North America portal
* Oceans portal

* Charlotte Harbor (estuary), an estuary in Florida
* Green Canyon, a US Gulf of Mexico petroleum exploration area
* Gulf of Mexico Foundation
* Jack 2 (a test well in the deep waters of the Gulf of Mexico)
* Keathley Canyon, a US Gulf of Mexico petroleum exploration area
* Nepheloid layer
* Orca Basin
* Outer Continental Shelf
* Sigsbee Escarpment, a US Gulf of Mexico petroleum exploration area
* Territorial evolution of the Caribbean
* Tunica Mound

## Notes

[edit]

1. ^ Usually, in Spanish, the name of the country is spelled México; however, in Peninsular (European) Spanish, the variant Méjico is used alongside the usual version. According to the Diccionario panhispánico de dudas by the Royal Spanish Academy and Association of Academies of the Spanish Language, the version with J is also correct; however, the spelling with X is recommended, as it is the one used in Mexico.[1]
2. ^ While the executive order specified an area of the U.S. continental shelf "extending to the seaward boundary with Mexico and Cuba",[26] the Geographic Names Information System (GNIS) and the GEOnet Names Server (GNS) were modified to explicitly refer to the gulf as a whole, without distinguishing territorial waters or the continental shelf.[27][28]
3. ^ 3rd edition, published in 1953. S-23 (Special Publication No. 23)
4. ^ The rig was storing 700,000 U.S. gallons (2,600,000 L) of diesel fuel.[94][95]

## References

[edit]

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## Further reading

[edit]

* Weddle, Robert Samuel (2000). Spanish Sea: The Gulf of Mexico in North American Discovery 1500–1685. Texas A&M University Press. ISBN 978-1-58544-066-5.

## External links

[edit]

Wikimedia Commons has media related to Gulf of Mexico.

* Resource Database for Gulf of Mexico Research
* Gulf of Mexico Integrated Science at the Wayback Machine (archived June 3, 2008)

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* Arafura Sea
* Bali Sea
* Banda Sea
* Bering Sea
* Bismarck Sea
* Bohai Sea
* Bohol Sea
* Camotes Sea
* Celebes Sea
* Chilean Sea
* Coral Sea
* East China Sea
* Gulf of Alaska
* Gulf of Anadyr
* Gulf of California
* Gulf of Carpentaria
* Gulf of Fonseca
* Gulf of Panama
* Gulf of Thailand
* Gulf of Tonkin
* Halmahera Sea
* Java Sea
* Koro Sea
* Mar de Grau
* Molucca Sea
* Moro Gulf
* Philippine Sea
* Salish Sea
* Savu Sea
* Sea of Japan
* Sea of Okhotsk
* Seram Sea
* Seto Inland Sea
* Shantar Sea
* Sibuyan Sea
* Solomon Sea
* South China Sea
* Sulu Sea
* Tasman Sea
* Visayan Sea
* West Philippine Sea
* Yellow Sea

Endorheic basins|

* Aral Sea
* Caspian Sea
* Dead Sea
* Salton Sea

Others|

* Ancient oceans
* Ocean
* Sea
* Superocean

* Oceans portal
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Marginal seas of the Atlantic Ocean

Basins|

* Foxe Basin

Bays|

* Baffin Bay
* Bay of Biscay
* Bay of Campeche
* Bay of Fundy
* Bothnian Bay
* Hudson Bay
* James Bay
* Pottles Bay

Channels|

* English Channel

Gulfs|

* Gulf of Bothnia
* Gulf of Finland
* Gulf of Guinea
* Gulf of Lion
* Gulf of Maine
* Gulf of Mexico
* Gulf of Sidra
* Gulf of St. Lawrence
* Gulf of Venezuela

Seas|

* Adriatic Sea
* Aegean Sea
* Alboran Sea
* American Mediterranean Sea
* Archipelago Sea
* Argentine Sea
* Balearic Sea
* Baltic Sea
* Black Sea
* Bothnian Sea
* Caribbean Sea
* Celtic Sea
* Greenland Sea
* Icarian Sea
* Ionian Sea
* Irish Sea
* Irminger Sea
* Kattegat
* Labrador Sea
* Levantine Sea
* Libyan Sea
* Ligurian Sea
* Mediterranean Sea
* Myrtoan Sea
* North Sea
* Norwegian Sea
* Sargasso Sea
* Sea of Åland
* Sea of Azov
* Sea of Crete
* Sea of the Hebrides
* Sea of Marmara
* Skagerrak
* Thracian Sea
* Tyrrhenian Sea
* Wadden Sea

Oceans portal

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Petroleum industry

* Petroleum
* Primary energy

Benchmarks|

* Argus Sour
* Bonny Light
* Brent
* Dubai
* Indian Basket
* Indonesian
* Isthmus-34 Light
* Japan Cocktail
* OPEC Reference Basket
* Tapis
* Urals
* West Texas Intermediate
* Western Canadian Select

Data|

| Natural gas|

* Consumption
* Production
* Reserves
* Imports
* Exports
* Price

|

Petroleum|

* Consumption
* Production
* Reserves
* Imports
* Exports
* Posted oil price
* Price
* of gasoline and diesel

Exploration|

* Core sampling
* Geophysics
* Integrated asset modelling
* Petroleum engineering
* Reservoir simulation
* Reservoir modeling
* Petroleum geology
* Petrophysics
* Reflection seismology
* Seismic inversion
* Seismic source

Drilling|

* Blowout
* Completion
* Squeeze job
* Differential sticking
* Directional drilling
* Geosteering
* Drill stem test
* Drilling engineering
* Drilling fluid
* invasion
* Lost circulation
* Measurement
* Shale oil extraction
* Ljungström method
* Tracers
* Underbalanced drilling
* Well logging

Production|

* Petroleum fiscal regime
* Concessions
* Production sharing agreements
* Artificial lift
* Gas lift
* Pumpjack
* Submersible pump (ESP)
* Downstream
* Enhanced oil recovery (EOR)
* Gas reinjection
* Steam injection
* Midstream
* Petroleum product
* Pipeline
* Refining
* Upstream
* Water injection
* Well intervention
* XT

History|

* 1967 Oil Embargo
* 1973 oil crisis
* 1979 oil crisis
* 1980s oil glut
* 1990 oil price shock
* 2000s energy crisis
* 2010s oil glut
* 2020 Russia–Saudi Arabia oil price war
* Nationalization
* GECF
* OPEC
* Seven Sisters
* Standard Oil
* Canada
* France
* India
* Iraq
* Norway
* Saudi Arabia
* United States
* Venezuela

Provinces
and fields|

* List of natural gas fields
* List of oil fields
* Caspian Sea
* East Midlands Oil Province
* East Texas
* Gulf of Mexico
* Niger Delta
* North Sea
* Permian Basin
* Persian Gulf
* Prudhoe Bay
* Russia
* Venezuela
* Western Canadian Sedimentary Basin

Other topics|

* Abbreviations
* Classification
* sweet oil
* sour oil
* Oil shale gas
* Orphan wells
* Peak oil
* fossil fuel phase-out
* timing
* Petrocurrency
* Petrodollar recycling
* Petrofiction
* Shale band
* Shale gas
* Swing producer
* Unconventional (oil and gas) reservoir
* heavy crude
* oil sands
* oil shale
* tight oil

Companies and
organisations|

Major
petroleum
companies

| Supermajors|

* BP
* Chevron
* Eni
* ExxonMobil
* Shell
* TotalEnergies

|

National oil
companies

* Abu Dhabi National Oil Company
* ANCAP
* Bharat Petroleum
* China National Offshore Oil Corporation
* China National Petroleum Corporation
* Ecopetrol
* Equinor
* Gazprom
* Hindustan Petroleum
* Indian Oil Corporation
* Iraq National Oil Company
* KazMunayGas
* Kuwait Petroleum Corporation
* Lotos
* Naftogaz
* National Iranian Oil Company
* National Iranian South Oil Company
* NNPC Limited
* Oil & Gas Development Company
* Oil and Natural Gas Corporation
* Orlen
* PDVSA
* Pemex
* Pertamina
* Petrobangla
* Petrobras
* PetroChina
* Petronas
* Petrovietnam
* PTT Public Company Limited
* QatarEnergy
* Rosneft
* Saudi Aramco
* Sinopec
* SOCAR
* Sonangol
* Sonatrach
* TPAO
* YPF

Energy trading|

* Enron
* Glencore
* Gunvor
* Mercuria
* Naftiran Intertrade
* Trafigura
* Vitol

Others|

* APA Corporation
* Cenovus Energy
* Cepsa
* ConocoPhillips
* Devon Energy
* Eneos Holdings
* Galp Energia
* Hess Corporation
* Husky Energy
* Imperial Oil
* Lukoil
* Marathon Oil
* Marathon Petroleum
* Occidental Petroleum
* OMV
* Phillips 66
* Port Harcourt Refining Company
* Reliance Industries
* Repsol
* Suncor Energy
* Sunoco
* Surgutneftegas
* TechnipFMC
* TNK-BP
* Tullow Oil
* Tüpraş
* Valero Energy

Major
services
companies

* Amec Foster Wheeler
* Baker Hughes
* Cameron International
* CGG
* CH2M
* Chicago Bridge & Iron Company
* China Oilfield Services
* Enbridge
* GE Power
* Halliburton
* Nabors Industries
* Naftiran Intertrade
* NOV Inc.
* Petrofac
* Saipem
* Schlumberger
* Snam
* Subsea 7
* TC Energy
* Transocean
* Valaris Limited
* Weatherford International
* John Wood Group

Others|

* American Petroleum Institute
* Canadian petroleum companies
* Intercontinental Exchange Futures
* International Association of Oil & Gas Producers
* International Energy Agency
* Society of Petroleum Engineers
* World Petroleum Council

* Category

* v
* t
* e

Waters of Texas

Bays and estuaries
of the Gulf of Mexico|

* Alazan Bay
* Aransas Bay
* Baffin Bay
* Carancahua Bay
* Christmas Bay
* Copano Bay
* Corpus Christi Bay
* Dickinson Bay
* East Bay
* East Matagorda Bay
* Espiritu Santo Bay
* Galveston Bay
* Guadalupe Bay
* Laguna Madre
* Lavaca Bay
* Matagorda Bay
* Nueces Bay
* Oso Bay
* Redfish Bay
* Sabine Lake
* San Antonio Bay
* South Bay
* St. Charles Bay
* Tres Palacios Bay
* Trinity Bay
* West Bay

Channels and canals|

* Acequia Madre de Valero
* American Canal
* Aransas Pass
* Bolivar Roads
* Brazos Santiago Pass
* Cedar Bayou
* Franklin Canal
* Gulf Intracoastal Waterway
* Houston Ship Channel
* Matagorda Ship Channel
* Pass Cavallo
* Port Mansfield Channel
* Riverside Canal
* Sabine Pass
* Sabine–Neches Waterway
* San Luis Pass

Lakes and reservoirs|

* Amistad Reservoir
* Caddo Lake
* Canyon Lake
* Cedar Creek Reservoir
* Choke Canyon Reservoir
* Falcon International Reservoir
* Inks Lake
* Lady Bird Lake
* Lavon Lake
* Lake Austin
* Lake Bardwell
* Lake Buchanan
* Lake Conroe
* Lake Corpus Christi
* Lake Ray Hubbard
* Lake Ray Roberts
* Lake LBJ
* Lake Livingston
* Lake Marble Falls
* Lake Meredith
* Lake Tawakoni
* Lake Texoma
* Lake Travis
* Lewisville Lake
* Richland-Chambers Reservoir
* Sam Rayburn Reservoir
* Toledo Bend Reservoir

Rivers|

* Angelina River
* Blanco River
* Bosque River
* Brazos River
* Buffalo Bayou
* Colorado River
* Concho River
* Canadian River
* Guadalupe River
* James River
* Lampasas River
* Lavaca River
* Leon River
* Little River
* Llano River
* Navidad River
* Neches River
* Nolan River
* Nueces River
* Frio River
* Paluxy River
* Pease River
* Pedernales River
* Prairie Dog Town Fork Red River
* Red River
* Rio Grande
* Devils River
* Pecos River
* Sabine River
* San Antonio River
* Medina River
* San Bernard River
* San Gabriel River
* San Jacinto River
* San Marcos River
* San Saba River
* Sulphur River
* Trinity River
* Wichita River
* White River

Wetlands|

* Big Cypress Bayou
* Cow Bayou
* Ottine wetlands
* Rincon Bayou
* Rio Grande Valley

Authority control databases

International|

* VIAF

National|

* Germany
* United States
* Czech Republic
* Sweden
* Israel

Other|

* IdRef
* NARA

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