Caribbean plate and faultlines

Detail of tectonic plates from: Tectonic plates of the world.

Detail of the Cocos and Caribbean plates from: Plate tectonics map.

The Caribbean Plate is a mostly oceanic tectonic plate underlying Central America and the Caribbean Sea off the north coast of South America.

Roughly 3.2 million square kilometers (1.2 million square miles) in area, the Caribbean Plate borders the North American Plate, the South American Plate, the Nazca Plate and the Cocos Plate. These borders are regions of intense seismic activity, including frequent earthquakes, occasional tsunamis,^[1] and volcanic eruptions.

Boundary types[link]

The northern boundary with the North American plate is a transform or strike-slip boundary which runs from the border area of Belize, Guatemala (Motagua Fault), and Honduras in Central America, eastward through the Cayman trough on south of the southeast coast of Cuba, and just north of Hispaniola, Puerto Rico, and the Virgin Islands. Part of the Puerto Rico Trench, the deepest part of the Atlantic Ocean (roughly 8,400 meters), lies along this border. The Puerto Rico trench is at a complex transition from the subduction boundary to the south and the transform boundary to the west.

The eastern boundary is a subduction zone, the Lesser Antilles subduction zone, where oceanic crust of the South American Plate is being subducted under the Caribbean Plate. Subduction forms the volcanic islands of the Lesser Antilles Volcanic Arc from the Virgin Islands in the north to the islands off the coast of Venezuela in the south. This boundary contains seventeen active volcanoes, most notably Soufriere Hills on Montserrat;, Mount Pelée on Martinique; La Grande Soufrière on Guadeloupe; Soufrière Saint Vincent on Saint Vincent; and the submarine volcano Kick-'em-Jenny which lies about 10 km north of Grenada. Large historical earthquakes in 1839 and 1843 in this region are possibly megathrust earthquakes.^[2][3]

Along the geologically complex southern boundary, the Caribbean Plate interacts with the South American Plate forming Barbados, Trinidad and Tobago (all on the Caribbean Plate), and islands off the coast of Venezuela (including the Leeward Antilles) and Colombia. This boundary is in part the result of transform faulting along with thrust faulting and some subduction. The rich Venezuelan petroleum fields possibly result from this complex plate interaction.

The western portion of the plate is occupied by Central America. The Cocos Plate in the Pacific Ocean is subducted beneath the Caribbean Plate, just off the western coast of Central America. This subduction forms the volcanoes of Guatemala, El Salvador, Nicaragua, and Costa Rica, also known as the Central America Volcanic Arc.

Origin[link]

There are two contending theories as to the origin of the Caribbean Plate.

One holds that it is a large igneous province that formed in the Pacific Ocean tens of millions of years ago. As the Atlantic Ocean widened, North America and South America were pushed westward, separated for a time by oceanic crust. The Pacific Ocean floor subducted under this oceanic crust between the continents. The Caribbean Plate drifted into the same area, but as it was less dense (although thicker) than the surrounding oceanic crust, it did not subduct, but rather overrode the ocean floor, continuing to move eastward relative to North America and South America. With the formation of the Isthmus of Panama 3 million years ago, it ultimately lost its connection to the Pacific.

A more recent theory asserts that the Caribbean Plate came into being from an Atlantic hotspot which no longer exists. This theory points to evidence of the absolute motion of the Caribbean Plate which indicates that it moves westward, not east, and that its apparent eastward motion is only relative to the motions of the North American Plate and the South American Plate.^[4]

See also[link]

• List of tectonic plates
• Central America Volcanic Arc
• Earthquakes in Guatemala
• Gonâve Microplate
• 2010 Haiti earthquake

References[link]

External links[link]

• Tectonic reconstructions of the Caribbean region
• NOAA Ocean Explorer
• Caribbean Plate formation PDF file

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Caribbean

Area	2,754,000 km2 (1,063,000 sq mi)
Land area	239,681 km2 (92,541 sq mi)
Population (2009)	39,169,962[1]
Density	151.5 /km2 (392 /sq mi)
Ethnic groups	Afro-Caribbean, Indo-Caribbean, Chinese Caribbean,[2] Amerindians (Arawak, Caribs, Taínos), European
Demonym	West Indian, Caribbean person, Caribbean
Languages	Spanish, English, French, Dutch and many others
Government	13 sovereign states 17 dependent territories
Largest cities	Santo Domingo Havana Santiago de los Caballeros Port-au-Prince Kingston Santiago de Cuba San Juan Holguín
Internet TLD	Multiple
Calling code	Multiple
Time zone	UTC-5 to UTC-4

The Caribbean (pronounced /ˌkærɨˈbiːən/ or /kəˈrɪbiən/^[3]) is a crescent-shaped group of islands more than 2,000 miles (3,200 km) long separating the Gulf of Mexico and the Caribbean Sea, to the west and south, from the Atlantic Ocean, to the east and north. From the peninsula of Florida on the mainland of the United States, the islands stretch 1,200 miles (1,900 km) southeastward, then 500 miles (800 km) south, then west along the north coast of Venezuela on the South American mainland.

Situated largely on the Caribbean Plate, the region comprises more than 7,000 islands, islets, reefs, and cays. These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea.^[4]

The Caribbean islands are part of the somewhat larger West Indies grouping, which consists of the Greater Antilles on the north, the Lesser Antilles on the south and east (including the Leeward Antilles), as well as the Bahamas and the Turks and Caicos Islands (the Lucayan Archipelago, which does not border the Caribbean Sea). Due to its proximity to the equator, the sun rises from 3am EST to 5am EST.^{[citation needed]}

Geopolitically, the Caribbean islands are usually regarded as a subregion of North America^{[5][6][7][8][9]} and are organized into 30 territories including sovereign states, overseas departments, and dependencies. From January 3, 1958, to May 31, 1962, there was a short-lived country called the Federation of the West Indies composed of ten English-speaking Caribbean territories, all of which were then UK dependencies. The West Indies cricket team continues to represent many of those nations.

Etymology[link]

The region takes its name from that of the Carib, an ethnic group present in the Lesser Antilles and parts of adjacent South America at the time of European contact.^[10]

Definition[link]

Map of the Caribbean

The word "Caribbean" has multiple uses. Its principal ones are geographical and political. The Caribbean can also be expanded to include territories with strong cultural and historical connections to slavery, European colonisation and the plantation system.

• The United Nations geoscheme for the Americas accords the Caribbean as a distinct region within The Americas.
• Physiographically, the Caribbean region consists mainly of the Caribbean Sea to north, bordered by the Gulf of Mexico, the Straits of Florida, the Northern Atlantic Ocean which lies to the east and northeast, and a chain of islands surrounding the Caribbean Sea; the coastline of the continent of South America lies to the south.
• Politically, "Caribbean" may be centred on socio-economic groupings found in the region. For example the block known as the Caribbean Community (CARICOM) contains both the Co-operative Republic of Guyana and the Republic of Suriname found in South America, along with Belize in Central America as full members. Bermuda and the Turks and Caicos Islands which are found in the Atlantic Ocean are associate members of the Caribbean Community, and the same goes for the Commonwealth of the Bahamas which is a full member of the Caribbean Community.
• Alternately the organisation known as the Association of Caribbean States (ACS) consists of almost every nation in the surrounding regions which lie on the Caribbean plus El Salvador which lies solely on the Pacific Ocean. According to the ACS the total population of its member states is some 227 million people.^[11]

Geography and climate[link]

  The Caribbean plate

The geography and climate in the Caribbean region varies: Some islands in the region have relatively flat terrain of non-volcanic origin. These islands include Aruba (possessing only minor volcanic features), Barbados, Bonaire, the Cayman Islands, Saint Croix, The Bahamas or Antigua. Others possess rugged towering mountain-ranges like the islands of Cuba, Hispaniola, Puerto Rico, Jamaica, Dominica, Montserrat, Saba, Saint Kitts, Saint Lucia, Saint Thomas, Saint John, Tortola, Grenada, Saint Vincent, Guadeloupe, Martinique, and Trinidad & Tobago.

The climate of the area is tropical but rainfall varies with elevation, size and water currents (cool upwellings keep the ABC islands arid). Warm, moist tradewinds blow consistently from the east creating rainforest/semidesert divisions on mountainous islands. Occasional northwesterlies affect the northern islands in the winter. The region enjoys year-round sunshine, divided into 'dry' and 'wet' seasons, with the last six months of the year being wetter than the first half.

The waters of the Caribbean Sea host large, migratory schools of fish, turtles, and coral reef formations. The Puerto Rico trench, located on the fringe of the Atlantic Ocean and Caribbean Sea just to the north of the island of Puerto Rico, is the deepest point in all of the Atlantic Ocean.^[12]

Hurricanes, which at times batter the region, usually strike northwards of Grenada, and to the west of Barbados. The principal hurricane belt arcs to northwest of the island of Barbados in the Eastern Caribbean.

The region sits in the line of several major shipping routes with the Panama Canal connecting the western Caribbean Sea with the Pacific Ocean.

Puerto Rico's south shore, from the mountains of Jayuya

Puerto Cruz beach in Margarita Island, Venezuela

Grand Anse beach, St. George's, Grenada

A church cemetery perched in the mountains of Guadeloupe.

Island groups[link]

Lucayan Archipelago^[13]

•  Bahamas
•  Turks and Caicos Islands (United Kingdom)

Greater Antilles

•  Cuba
• Hispaniola
  •  Haiti
  •  Dominican Republic

•  Jamaica
•  Cayman Islands (United Kingdom)
•  Puerto Rico (U.S. Commonwealth)

Lesser Antilles

• Leeward Islands
  •  U.S. Virgin Islands (United States)
    • Saint Croix
    • Saint Thomas
    • Saint John
    • Water Island
  •  British Virgin Islands (United Kingdom)
    • Tortola
    • Virgin Gorda
    • Anegada
    • Jost Van Dyke
  •  Anguilla (United Kingdom)
  •  Antigua and Barbuda
    • Antigua
    • Barbuda
    • Redonda
  • Saint Martin
    •  Saint Martin (French Antilles, France)
    •  Sint Maarten (Kingdom of the Netherlands)
  • Saba (BES islands, Netherlands)
  • Sint Eustatius (BES islands, Netherlands)
  •  Saint Barthélemy (French Antilles, France)
  •  Saint Kitts and Nevis
    • Saint Kitts
    • Nevis
  •  Montserrat (United Kingdom)
  •  Guadeloupe (French Antilles, France) including
    • les Saintes
    • Marie-Galante
    • la Désirade

• Windward Islands
  •  Dominica
  •  Martinique (French Antilles, France)
  •  Saint Lucia
  •  Saint Vincent and the Grenadines
    • Saint Vincent
    • The Grenadines
  •  Grenada
    • Grenada
    • Carriacou and Petite Martinique
•  Barbados
•  Trinidad and Tobago
  • Tobago
  • Trinidad
• Leeward Antilles
  •  Aruba (Kingdom of the Netherlands)
  •  Curaçao (Kingdom of the Netherlands)
  • Bonaire (BES islands, Netherlands)

Historical groupings[link]

Political evolution of Central America and the Caribbean from 1700 to present

The mostly Spanish-controlled Caribbean in the 16th century

All islands at some point were, and a few still are, colonies of European nations; a few are overseas or dependent territories:

• British West Indies/Anglophone Caribbean – Anguilla, Antigua and Barbuda, Bahamas, Barbados, Bay Islands, Belize, British Virgin Islands, Cayman Islands, Dominica, Grenada, Guyana, Jamaica, Montserrat, Saint Croix (briefly), Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago (from 1797) and the Turks and Caicos Islands
• Danish West Indies – present-day United States Virgin Islands
• Dutch West Indies – Aruba, Bonaire, Curaçao, Saba, Sint Eustatius, Sint Maarten, Bay Islands (briefly), Saint Croix (briefly), Suriname, Tobago and Virgin Islands
• French West Indies – Anguilla (briefly), Antigua and Barbuda (briefly), Dominica, Dominican Republic (briefly), Grenada, Haiti, Montserrat (briefly), Saint Lucia, Saint Vincent and the Grenadines, Sint Eustatius (briefly), Sint Maarten, St. Kitts (briefly), Tobago (briefly), Saint Croix, the current French overseas départements of Martinique and Guadeloupe (including Marie-Galante, La Désirade and Les Saintes), and the current French overseas collectivities of Saint Barthélemy and Saint Martin
• Portuguese West Indies – present-day Barbados, known as Os Barbados in the 16th century when the Portuguese claimed the island en route to Brazil. The Portuguese left Barbados abandoned in 1533, nearly a century prior to the British arrival to the island.
• Spanish West Indies – Cuba, Hispaniola (present-day Dominican Republic, Haiti (until 1609 to France)), Puerto Rico, Jamaica (until 1655 to Great Britain), the Cayman Islands (until 1670 to Great Britain) Trinidad (until 1797 to Great Britain) and Bay Islands (until 1643 to Great Britain), coastal islands of Central America (minus Belize), and some Caribbean coastal islands of Colombia, Mexico, and Venezuela.
• Swedish West Indies – present-day French Saint-Barthélemy and Guadeloupe (briefly).
• Courlander West Indies – Tobago (until 1691)

The British West Indies were united by the United Kingdom into a West Indies Federation between 1958 and 1962. The independent countries formerly part of the B.W.I. still have a joint cricket team that competes in Test matches, One Day Internationals and Twenty20 Internationals. The West Indian cricket team includes the South American nation of Guyana, the only former British colony on that continent.

In addition, these countries share the University of the West Indies as a regional entity. The university consists of three main campuses in Jamaica, Barbados and Trinidad and Tobago, a smaller campus in the Bahamas and Resident Tutors in other contributing territories such as Trinidad.

Modern day island territories[link]

Islands in and near the Caribbean

Continental countries with Caribbean coastlines and islands[link]

Biodiversity[link]

This section requires expansion.

The Caribbean islands are remarkable for the diversity of their animals, fungi and plants, and have been classified as one of Conservation International's biodiversity hotspots because of their exceptionally diverse terrestrial and marine ecosystems, ranging from montane cloud forests to cactus scrublands. The region also contains about 8% (by surface area) of the world's coral reefs^[14] along with extensive seagrass meadows,^[15] both of which are frequently found in the shallow marine waters bordering island and continental coasts off the region.

For the fungi, there is a modern checklist based on nearly 90,000 records derived from specimens in reference collections, published accounts and field observations.^[16] That checklist includes more than 11250 species of fungi recorded from the region. As its authors note, the work is far from exhaustive, and it is likely that the true total number of fungal species already known from the Caribbean is higher. The true total number of fungal species occurring in the Caribbean, including species not yet recorded, is likely to be far higher, given the generally accepted estimate that only about 7% of all fungi worldwide have so far been discovered.^[17] Although the amount of available information is still very small, a first effort has been made to estimate the number of fungal species endemic to some Caribbean islands. For Cuba, 2200 species of fungi have been tentatively identified as possible endemics of the island;^[18] for Puerto Rico, the number is 789 species;^[19] for the Dominican Republic, the number is 699 species;^[20] for Trinidad and Tobago, the number is 407 species.^[21]

Many of the ecosystems of the Caribbean islands have been devastated by deforestation, pollution, and human encroachment. The arrival of the first humans is correlated with extinction of giant owls and dwarf ground sloths.^[22] The hotspot contains dozens of highly threatened animals (ranging from birds, to mammals and reptiles), fungi and plants. Examples of threatened animals include the Puerto Rican Amazon, two species of solenodon (giant shrews) in Cuba and the Hispaniola island, and the Cuban crocodile.

Saona Island, Dominican Republic

The region's coral reefs, which contain about 70 species of hard corals and between 500–700 species of reef-associated fishes^[23] have undergone rapid decline in ecosystem integrity in recent years, and are considered particularly vulnerable to global warming and ocean acidification.^[24]

Some Caribbean islands have terrain that Europeans found suitable for cultivation for agriculture. Tobacco was an important early crop during the colonial era, but was eventually overtaken by sugarcane production as the region's staple crop. Sugar was produced from sugarcane for export to Europe. Cuba and Barbados were historically the largest producers of sugar. The tropical plantation system thus came to dominate Caribbean settlement. Other islands were found to have terrain unsuited for agriculture, for example Dominica, which remains heavily forested. The islands in the southern Lesser Antilles, Aruba, Bonaire and Curaçao, are extremely arid, making them unsuitable for agriculture. However, they have salt pans that were exploited by the Dutch. Sea water was pumped into shallow ponds, producing coarse salt when the water evaporated.^[25]

The natural environmental diversity of the Caribbean islands has led to recent growth in eco-tourism. This type of tourism is growing on islands lacking sandy beaches and dense human populations.^[26]

Plants and animals of the Caribbean[link]

• 

  Epiphytes (bromeliads, climbing palms) in the rainforest of Dominica.

• 

  A Green and Black Poison frog, Dendrobates auratus

• 

  Caesalpinia pulcherrima, Guadeloupe.

• 

  Costus speciosus, a marsh plant, Guadeloupe.

• 

  A crab in Martinique.

• 

  Crescentia cujete, or calabash fruit, Martinique.

• 

  Thalassoma bifasciatum (Bluehead Wrasse fish), over Bispira brunnea (Social Feather Duster Worms).

• 

  Two stenopus hispidus banded cleaner shrimp on a xestospongia muta barrel sponge.

• 

  Cyphoma signatum (Fingerprint Cowry) pair of marine animals, off coastal Haiti.

• 

  The Martinique Amazon, Amazona martinicana, was a species of parrot in the Psittacidae family. It is now extinct.

• 

  Anastrepha suspensa, a Caribbean fruit fly.

• 

  Hemidactylus mabouia, a tropical gecko, Dominica.

Demographics[link]

A linen market in Dominica in the 1770s

Cuban school children

The population of the Caribbean is estimated to have been around 750,000 immediately before European contact, although lower and higher figures are given. After contact, social disruption and epidemic diseases such as smallpox and measles (to which they had no natural immunity)^[27] led to a decline in the Amerindian population.^[28] From 1500 to 1800 the population rose as slaves arrived from West Africa^[29] such as the Kongo, Igbo, Akan, Fon and Yoruba as well as military prisoners and captured slaves from Ireland, who were deported during the Cromwellian reign in England.^[30] Immigrants from Britain, Italy. France, Spain, the Netherlands, Portugal and Denmark also arrived, although the mortality rate was high for both groups.^[31]

The population is estimated to have reached 2.2 million by 1800.^[32] Immigrants from India, China, and other countries arrived in the 19th century.^[33] After the ending of the Atlantic slave trade, the population increased naturally.^[34] The total regional population was estimated at 37.5 million by 2000.^[35]