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Gulf of Mexico

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Dictionary: Mexico, Gulf of


An arm of the Atlantic Ocean in southeast North America bordering on eastern Mexico, the southeast United States, and Cuba. It connects with the Atlantic Ocean through the Straits of Florida and with the Caribbean Sea through the Yucatán Channel.

 

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Gulf, southeastern coast of North America, connected to the Atlantic Ocean by the Straits of Florida and to the Caribbean Sea by the Yucatán Channel. Covering an area of 600,000 sq mi (1,550,000 sq km), it is bounded by the U.S., Mexico, and Cuba. It has a maximum depth, in the Mexico Basin, of 17,070 ft (5,203 m). The Gulf Stream enters it from the Caribbean Sea and flows out to the Atlantic. The Mississippi and the Rio Grande are the major rivers draining into the gulf. Its major ports are Veracruz in Mexico, and Galveston, New Orleans, Pensacola, and Tampa in the U.S.

For more information on Gulf of Mexico, visit Britannica.com.

Sci-Tech Encyclopedia: Gulf of Mexico
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A subtropical semienclosed sea bordering the western North Atlantic Ocean. It connects to the Caribbean Sea on the south through the Yucatan Channel and with the Atlantic on the east through the Straits of Florida. To the north, it is bounded by North America, to the west and south by Mexico and Central America, and on the east and southeast by Florida and Cuba respectively. See also Intra-Americas Sea.

The continental shelves surrounding the gulf are very broad along the eastern (Florida), northern (Texas, Louisiana, Mississippi, Alabama), and southern (Campeche) area, averaging 125–186 mi (200–300 km) wide. The continental shelves along the western and southwestern (Mexico) and southeastern (Cuba) boundaries of the gulf are narrow, often being less than 12mi (20 km) wide. Between the continental shelves and the Sigsbee Abyssal Plain are three steep continental slopes: the Florida Escarpment off west Florida, the Campeche Escarpment off Yucatan, and the Sigsbee Escarpment south of Texas and Louisiana. Two major submarine canyons crease the gulf's shelf areas: the De Soto Canyon near the Florida-Alabama border, and the Campeche Canyon west of the Yucatan Peninsula. See also Continental margin; Escarpment; Glacial epoch; Holocene; Marine geology.

Compared with the North American rivers, the Mexican rivers are short, but they still provide approximately 20% of the fresh-water input to the gulf because of extensive orographicrainfall from the trade winds that dominate the southern flank of the basin. Meteorologically, the Gulf of Mexico is a transition zone between the tropical wind system (easterlies) and the westerly frontal-passage-dominated weather (in winter particularly) to the north, punctuated with intense tropical storms in summer/autumn called the West Indian Hurricane. Much of the atmospheric moisture supplied to the North American heartland during spring and summer has its originover the gulf, and thus it is a vital element in the so-called North American Monsoon. See also Hurricane; Monsoon meteorology; Storm surge; Tropical meteorology.

The Gulf Stream System dominates the oceanic circulation in the Gulf of Mexico. The Yucatan Current, flowing northward into the eastern Gulf of Mexico, is the first recognizable western boundary current in the Gulf Stream System. North of the Yucatan Peninsula, the flow penetrates into the eastern gulf (where it is called the Gulf Loop Current) at varying distances with a distinctive chronology, loops around clockwise, and finally exits through the Straits of Florida,where it is called the Florida Current. This intense current reaches to more than 3300ft (1000m) depth, and transports 1.1 × 109 ft3/s (3 × 107 m3/s) of water, an amount 1800 times that of the Mississippi River. See also Gulf Stream; Mediterranean Sea; Ocean circulation.

Surrounding the Gulf of Mexico are many population centers that exploit the numerous estuaries, lagoons, and oil and gas fields. Coral reefs off Yucatan, Cuba, and Florida provide important fishery and recreational activities. There are extensive wetlands along most coastal boundaries with ecological connections to many seagrass beds nearshore and coastal mangrove forests ofMexico, Cuba, and Florida. This biogeographic confluence creates one of the most productive marine areas on Earth, providing the food web for commercially important species such as lobster, demersal (bottom-dwelling) fish, and shrimp; this same ecology supports large populations of sea turtles and marine mammals. The coastal and nearshore waters also support large phytoplankton populations. The juxtaposition of these enormous marine resources and human activities has led to a distinctive anthropogenic impact on the health of the marine ecosystem. See also Biogeography; Estuarine oceanography; Food web; Mangrove; Marine ecology; Reef; Wetlands.


US History Encyclopedia: Gulf of Mexico
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Bounded by the southern United States, eastern Mexico, and Cuba, this oval-shaped body of water has played a central role in North America's economic and political development. The Gulf of Mexico and its coastal beaches, estuaries, and islands have supplied varied peoples with abundant food and minerals. A warm current, the Gulf Stream, enters the gulf from the Caribbean Sea at the Strait of Yucatán and flows into the Atlantic at the Straits of Florida. The gulf's large mass of warm water shapes weather across the region, creating long growing seasons and violent tropical storms. The 600,000-square-mile gulf has been the site of important trade routes and settlements and a pivotal arena for imperial contests since Europeans first arrived in the Americas.

Diverse native societies once ringed the gulf, including complex Maya and Aztec civilizations in Mesoamerica, and Calusa, Chickasaw, Choctaw, Natchez, and Karankawa peoples in what became the United States. Spain first explored the gulf in voyages by Juan Ponce de León in 1513 and Alonso Alvarez de Pineda in 1519, and colonial outposts such as Havana and Veracruz rapidly followed. The gulf was a Spanish sea for nearly two centuries, and Spanish galleons took great quantities of silver and gold from the region. The French entered the gulf in about 1700, and the heart of their colonial effort was the Mississippi River and New Orleans, founded in 1718.

Imperial rivalries between Spain, France, and England dominated the region in the eighteenth century. The eventual winner, the United States, entered the scene in 1803 with the Louisiana Purchase. The Americans continued earlier patterns of growing rice, sugar, and cotton using slave labor, and New Orleans became their major gulf port. A powerful desire for new lands led to American acquisition of Florida, completed between 1810 and 1819. Florida and Texas were granted statehood in 1845, and the admission of Texas led to war with Mexico. The American victory in the Mexican-American War in 1848 confirmed the Rio Grande as the western edge of America's Gulf Coast. Expansion along the gulf ended there, as antebellum efforts to purchase Cuba for its sugar plantations and strategic position failed.

The security and stability of the Gulf of Mexico remained a significant foreign policy concern during the twentieth century. In 1898 the American victory in the Spanish-American War gave Puerto Rico to the United States, and Cuba became an American protectorate. The Panama Canal, begun in 1904, made shipping lanes in the gulf even more important. The United States intervened in the region many times in the twentieth century with its greatest focus on its complex Cold War relations with Cuba.

Military tensions in the gulf eased by the beginning of the twenty-first century, but environmental concerns increased as large numbers of Americans built homes along the Gulf or visited its beaches as tourists. In the twenty-first century the Gulf Coast remained a major agricultural region and the site of important fisheries, and after the 1940s it became a leader in oil, natural gas, and petrochemical production. The Gulf of Mexico has rich natural resources, but its many users put its productive waters and fragile coastlines and reefs at risk.

Bibliography

Gore, Robert H. The Gulf of Mexico: A Treasury of Resources in the American Mediterranean. Sarasota, Fla.: Pineapple Press, 1992.

Weber, David J. The Spanish Frontier in North America. New Haven, Conn.: Yale University Press, 1992.

 
Columbia Encyclopedia: Gulf of Mexico
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Mexico, Gulf of, arm of the Atlantic Ocean, c.700,000 sq mi (1,813,000 sq km), SE North America. The Gulf stretches more than 1,100 mi (1,770 km) from west to east and c.800 mi (1,290 km) from north to south. It is bordered by the southeast coast of the United States from Florida to Texas, and the east coast of Mexico from Tamaulipas to Yucatán. Cuba is near the Gulf's entrance. On Cuba's northern side the Gulf is connected with the Atlantic Ocean by the Straits of Florida; on Cuba's southern side it is connected with the Caribbean Sea by the Yucatán Channel. Warm water from the Caribbean enters the Gulf through the Channel, forms a loop current off the U.S. and Mexican coasts, and then exits through the Straits as the Florida Current, becoming the Gulf Stream.

The Bay of Campeche (Bahía de Campeche), Mexico, and Apalachee Bay, Florida, are the Gulf's largest arms. Sigsbee Deep (12,714 ft/3,875 m), the Gulf's deepest part, lies off the Mexican coast. The shoreline is generally low, sandy, and marshy, with many lagoons and deltas. Chief of the many rivers entering the Gulf are the Mississippi, Alabama, Brazos, and Rio Grande. The U.S. Intracoastal Waterway follows the Gulf's northern coast.

Oil deposits from the continental shelf are tapped by offshore wells, especially near Texas and Louisiana. Most of the U.S. shrimp catch comes from the Gulf Coast; menhaden is also important. The discovery in the 1990s of a large oxygen-depleted "dead zone" off the Louisiana coast raised concerns about the effects of agricultural runoff on the Gulf; the zone has at times encompassed more than 8,000 sq mi (20,700 sq km). The chief Gulf ports are at Tampa and Pensacola, Fla.; Mobile, Ala.; New Orleans; Galveston and Corpus Christi, Tex.; Tampico and Veracruz, Mexico; and Havana, Cuba.


Geography: Gulf of Mexico
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Part of the Atlantic Ocean bordered by the southeast coast of the United States and the east coast of Mexico.

Word Tutor: Gulf of Mexico
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pronunciation

IN BRIEF: A large area of ocean bordering on Mexico and the states of Florida, Alabama, Louisiana, Mississippi and Texas.

pronunciation There were several hurricanes that hit the Gulf of Mexico this year.

Wikipedia: Gulf of Mexico
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Gulf of Mexico in 3D perspective.

The Gulf of Mexico (Spanish: Golfo de México) is the eleventh largest body of water in the world. Considered a smaller part of the Atlantic Ocean, it is an ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. The shape of its basin is roughly oval and approximately 810 nautical miles (1,500 km) wide and filled with sedimentary rocks and debris. It is part of the Atlantic Ocean through the Florida Straits between the U.S. and Cuba, and with the Caribbean Sea (with which it forms the American Mediterranean Sea) via the Yucatan Channel between Mexico and Cuba. Tidal ranges are extremely small due to the narrow connection with the ocean. The gulf basin is approximately 615,000 mi² (1.6 million km²). Almost half of the basin is shallow intertidal waters. At its deepest it is 14,383 ft (4,384 m) at the Sigsbee Deep, an irregular trough more than 300 nautical miles (550 km) long. It was probably formed approximately 300 million years ago as a result of the seafloor sinking.[1]

Contents

Geology

Gulf of Mexico with ship.jpg
Sediment in the Gulf of Mexico

Little is known about the geologic history of the Gulf of Mexico Basin before Late Triassic time. Some authors have postulated the presence of a basin in the area during most of Paleozoic time, but most evidence seems to indicate that Paleozoic rocks do not underlie most of the Gulf of Mexico basin and that the area was, at the end of Paleozoic time, part of the large supercontinent of Pangea, the result of the collision of several continental plates.[2]

The present Gulf of Mexico basin is believed to have had its origin in Late Triassic time as the result of rifting within the North American Plate as it began to crack and drift away from the African and South American plates. Rifting probably continued through Early and Middle Jurassic time with the formation of "stretched" or "transitional" continental crust throughout the central part of the basin. Intermittent advance of the sea into the continental area from the west during late Middle Jurassic time resulted in the formation of the extensive salt deposits such as the Louann Salt. It appears that the main drifting episode, during which the Yucatan block moved southward and separated from the North American Plate and true oceanic crust formed in the central part of the basin, took place during the early Late Jurassic, after the formation of the salt deposits.[2]

In 2002 geologist Michael Stanton published a speculative essay suggesting a large cometary impact origin for the Gulf of Mexico at the close of the Permian.[3]

Since Late Jurassic time, the basin has been a stable geologic province characterized by the persistent subsidence of its central part, probably due at first to thermal cooling and later to sediment loading as the basin filled with thick prograding clastic wedges along its northwestern and northern margins, particularly during the Cenozoic.[2]

To the east, the stable Florida platform was not covered by the sea until the latest Jurassic or the beginning of Cretaceous time. The Yucatan platform was emergent until the mid-Cretaceous. After both platforms were submerged, the formation of carbonates and evaporites has characterized 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 Tertiary in a compressive deformation episode, the Laramide Orogeny, which created the Sierra Madre Oriental of eastern Mexico.[2]

Today, there are 7 main areas of the gulf:[2]

  • Gulf of Mexico Basin, which contains the Sigsbee Deep and can be further divided into the continental rise, the Sigsbee Abyssal Plain, and the Mississippi Cone.
  • Campeche Bank, which extends from the Yucatan Straits in the east to the Tabasco–Campeche Basin in the west and includes Arrecife Alacran.
  • Western Gulf of Mexico, which is located between Veracruz to the south and the Rio Grande to the north.
  • Northwest Gulf of Mexico, which extends from Alabama to the U.S.-Mexico border.

History

European exploration

Fishing boats in Biloxi
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, they had rebounded by the time of Rita's appearance.

Although Christopher Columbus was credited with the discovery of the Americas by Europeans, the ships in his four voyages never reached the Gulf of Mexico. Instead, Columbus sailed into the Caribbean around Cuba and Hispaniola.

The first European exploration of the Gulf of Mexico was Amerigo Vespucci in 1497. He followed the coastal land mass of central America before returning to the Atlantic Ocean via the Straits of Florida between Florida and Cuba. In his letters, Vespucci described this trip, and once Juan de la Cosa returned to Spain, a famous world map, depicting Cuba as an island, was produced.

In 1506, Hernán Cortés took part in the conquest of Hispaniola and Cuba, receiving a large estate of land and Indian slaves for his effort. In 1510, he accompanied Diego Velázquez de Cuéllar, an aide of the governor of Hispaniola, in 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 a complex social organization which they recognized as being 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 Diego Velázquez had given precedence to Grijalva as the captain of the next expedition to Yucatán.

In 1523, Ángel de Villafañe sailed toward Mexico City, but was shipwrecked en route along the coast of Padre Island, Texas in 1554. When word of the disaster reached Mexico City, the viceroy requested a rescue fleet and immediately sent Villafañe marching overland to find the treasure-laden vessels. Villafañe traveled to Pánuco and hired a ship to transport him to the site, which had already been visited from that community. 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 labored until September 12 to salvage the Padre Island treasure. This loss, in combination with other ship disasters around the Gulf of Mexico, gave rise to a plan for establishing a settlement on the northern Gulf Coast to protect shipping and more quickly rescue castaways. 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 granted Pánfilo de Narváez a license to claim what is now the 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 harbor 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 of it.

In 1697, Pierre Le Moyne d'Iberville sailed for France and was chosen by the Minister of Marine to lead an expedition to rediscover the mouth of the Mississippi River and to colonize Louisiana which the English coveted. Iberville's fleet sailed from Brest on 24 October 1698. On January 25, 1699, Iberville reached Santa Rosa Island in front of Pensacola founded by the Spanish; he sailed from there to Mobile Bay and explored Massacre Island, later renamed Dauphin Island. He cast anchor between Cat Island and Ship Island; and on February 13, 1699, he went to the mainland, Biloxi, with his brother Jean-Baptiste Le Moyne de Bienville.[4] On May 1, 1699, he completed a fort on the north-east side of the Bay of Biloxi, a little to the rear of what is now Ocean Springs, Mississippi. This fort was known as Fort Maurepas or Old Biloxi. A few days later, on May 4, Pierre Le Moyne sailed for France leaving his teenage brother, Jean-Baptiste Le Moyne, as second in command to the French commandant.

Principal features

Gulf beach near Sabine Pass.

The Gulf of Mexico's eastern, north, and northwestern shores lie along the US states of Florida, Alabama, Mississippi, Louisiana, and Texas. The US portion of the Gulf coastline spans 1,680 miles (2,700 km), receiving water from thirty-three major rivers that drain 31 states.[5] The Gulf's southwestern and southern shores lie along the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and the northernmost tip of Quintana Roo. The Mexican portion of the Gulf coastline spans 1,394 miles (2,243 km). 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.[6] River drainage and atmospheric fallout from industrial coastal cities also provide nutrients to the coastal zone.

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 the anticyclonic gyres which are shed by the Loop Current and travel westward where they eventually dissipate, and a permanent cyclonic gyre in the Bay of Campeche. The Bay of Campeche in Mexico constitutes a major arm of the Gulf of Mexico. Additionally, the gulf's shoreline is fringed by numerous bays and smaller inlets. A number of rivers empty into the gulf, most notably the Mississippi River 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 characterized by marshes and swamps as well as stretches of sandy beach.

The Gulf of Mexico is an excellent example of a passive margin. The continental shelf is quite wide at most points along the coast, most notably at the Florida and Yucatán Peninsulas. The shelf is exploited for its oil by means of offshore drilling rigs, most of which are situated in the western gulf and in 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 of the bays and sounds. Other important industries along the coast include shipping, petrochemical processing and storage, military use, paper manufacture, and tourism.

The gulf's warm water temperature can feed powerful Atlantic hurricanes causing extensive human death and other destruction as happened with Hurricane Katrina in 2005. In the Atlantic, a hurricane will draw up cool water from the depths and making it less likely that further hurricanes will follow in its wake (warm water being one of the preconditions necessary for their formation). However, the Gulf is shallower and its entire water column is warm. When a hurricane passes over, although the water temperature may drop it soon rebounds and becomes capable of supporting another tropical storm.[7]

The Gulf is considered aseismic: however, mild tremors have been recorded throughout history (usually 5.0 or less on the Richter scale). A 6.0 tremor was recorded on September 10, 2006, 250 miles (400 km) off the coast of Florida which caused no damage, but could be felt throughout the Southeastern United States. No damage or injuries were reported.[8] Earthquakes such as this may be caused by interactions between sediment loading on the sea floor and adjustment by the crust.[9]

Pollution

There are frequent "red tide" algae blooms[10] 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.

In July 2008, researchers reported that the dead zone that runs east-west, from near Galveston, Texas to near Venice, Louisiana, was about 8,000 square miles (21,000 km2), nearly the record. Between 1985 and 2008, the area roughly doubled in size.[11]

2006 earthquake

On September 10, 2006, the U.S. Geological Survey National Earthquake Information Center reported that a strong earthquake, ranking 6.0 on the Richter scale, occurred about 250 miles (400 km) west-southwest of Anna Maria, Florida around 10:56 AM EDT.

The quake was reportedly felt from Louisiana to Florida. There were no reports of major damages or casualties.[12] Items were knocked from shelves and seiches were observed in swimming pools in parts of Florida.[13] The earthquake was described by the USGS as a midplate earthquake, the largest and most widely felt recorded in the past three decades in the region.[13]

According to the September 11, 2006 issue of The Tampa Tribune, earthquake tremors were last felt in Florida in 1952, recorded in Quincy, 20 miles (32 km) northwest of Tallahassee.

See also

References

External links

Gallery


Coordinates: 25°N 90°W / 25°N 90°W / 25; -90


Translations: Gulf of Mexico
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中文(简体)(Chinese (Simplified))
墨西哥湾

中文(繁體)(Chinese (Traditional))
n. - 墨西哥灣


 
 

Did you mean: Gulf of Mexico (body of water, the Atlantic Ocean), Gulf of Mexico (Lyrics - Alabama), The Gulf of Mexico (Lyrics - Shawn Mullins) More...


 

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