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115-642: Main Ridge is the main mountainous ridge on the island of Tobago , Trinidad and Tobago . It is a 29-kilometre (18 mi) chain of hills which runs from southwest to northeast between the Caribbean Sea and the Southern Tobago fault system and reaches a maximum height of 572 m (1,877 ft). The Main Ridge Forest Reserve, which was legally established in 1776, is one of the oldest protected areas in

230-403: A 4-foot (1.2-metre) jewfish , a member of the grouper family. The wreck was purposely sunk for divers, and so all the doors and windows were removed. The waters around the island are home to many species of tropical fish, rays , sharks, and turtles. Tobago is home to two golf courses, both of which are open to visitors. The older of the two is Mount Irvine Hotel Golf Course, built in 1968. It

345-724: A Greater India formed of extended continental crust 2000 - 3000 km wide. The Alpine-Himalayan Orogenic Belt in Southeast Asia extends from the Himalayas in India through Myanmar ( West Burma block ) Sumatra , Java to West Sulawesi . During the Late Cretaceous to Paleogene, the northward movement of the Indian Plate led to the highly oblique subduction of the Neotethys along the edge of

460-577: A distance to rifting, and that rifting propagated towards, rather than away from the plume, has led to the suggestion the plume and associated magmatism may have been a result, rather than a cause, of the plate tectonic forces that led to the propagation of rifting from the Central to the North Atlantic. Mountain building continued along the North America Cordillera in response to subduction of

575-569: A land bridge formed across the Bering Straits between North America and Eurasia allowing the movement of land animals between the two continents. The PETM was followed by the less severe Eocene Thermal Maximum 2 (c. 53.69 Ma), and the Eocene Thermal Maximum 3 (c. 53 Ma). The early Eocene warm conditions were brought to an end by the Azolla event . This change of climate at about 48.5 Ma,

690-588: A major period of global warming. The change in climate was due to a rapid release of frozen methane clathrates from seafloor sediments at the beginning of the Paleocene-Eocene thermal maximum (PETM). The Oligocene is the third and youngest series/epoch of the Paleogene, and lasted from 33.9 Ma to 23.03 Ma. It is divided into two stages: the Rupelian 33.9 Ma to 27.82 Ma; and, Chattian 27.82 - 23.03 Ma. The GSSP for

805-570: A period of stability during which plantation culture began. Sugar, cotton and indigo factories sprang up and Africans were imported by the British to work as slaves. The economy flourished. France had abandoned the island to Britain in 1763, and by 1777 Tobago was exporting great quantities of cotton, indigo, rum and sugar. In 1781, the French retook the island during the Invasion of Tobago . On 24 May 1781,

920-608: A road along the northeast coast. There has also been damage to the reef in Charlotteville village caused by sealing the road at Flagstaff Hill and diverting more silty water down the stream from Flagstaff down to Charlotteville. Paleogene Much of the world's modern vertebrate diversity originated in a rapid surge of diversification in the early Paleogene, as survivors of the Cretaceous–Paleogene extinction event took advantage of empty ecological niches left behind by

1035-619: A single plate, several thousand kilometres wide, with the Tethyan Himalaya microcontinent separated from the Indian continent by an oceanic basin . The microcontinent collided with southern Eurasia c. 58 Ma (late Paleocene), whilst the velocity of the plate did not decrease until c. 50 Ma when subduction rates dropped as young, oceanic crust entered the subduction zone; 3) This model assigns older dates to parts of Greater India, which changes its paleogeographic position relative to Eurasia and creates

1150-690: A subduction zone along its western edge. This changed the forces acting on the Pacific Plate and led to a major reorganisation of plate motions across the entire Pacific region. The resulting changes in stress between the Pacific and Philippine Sea plates initiated subduction along the Izu-Bonin-Mariana and Tonga-Kermadec arcs. Subduction of the Farallon Plate beneath the American plates continued from

1265-579: A ward of Trinidad, thus terminating local government on Tobago and forming a unified colony government. In 1945 when the county council system was first introduced, Tobago was administered as a single county of Trinidad. In 1980 provisions were made for the Tobago House of Assembly to be revived as an entity providing local government in Tobago. Under the revived system, Tobago is made up of 12 local electoral districts with each district electing one Assemblyman to

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1380-463: Is also a popular diving location, since it is the southernmost of the Caribbean islands that have coral communities. Trinidad, which is further south, has no significant coral because of low salinity and high silt content, the result of its position close to the mouth of Venezuela 's Orinoco River . Scuba diving on Tobago tends to be centred at Speyside , almost diametrically across the island from

1495-416: Is based on tourism, fishing, and government spending, government spending being the largest. The local governing body, the Tobago House of Assembly (THA), employs 62% of the labor force. Tourism is still a fledgling industry. Conventional beach and water-sports tourism is largely in the southwest around the airport and the coastal strip. Meanwhile, ecotourism is growing in significance, much of it focused on

1610-489: Is believed to have been caused by a proliferation of aquatic ferns from the genus Azolla , resulting in the sequestering of large amounts of CO 2 from the atmosphere by the plants. From this time until about 34 Ma, there was a slow cooling trend known as the Middle-Late Eocene Cooling. As temperatures dropped at high latitudes the presence of cold water diatoms suggests sea ice was able to form in winter in

1725-504: Is found at the highest elevations and is the only fish species upstream of several waterfalls. Aquatic invertebrates include the decapods Atya innocous , Eudaniela garmani , Macrobrachium faustinum , and the introduced red-rimmed melania . Main Ridge provides critical habitat for three endemic amphibians: Turpin's frog , the Bloody Bay poison frog and the Charlotteville rain frog , which are endemic to north-eastern Tobago, and for

1840-562: Is largely composed of oceanic crust of the Caribbean Large Igneous Province that formed during the Late Cretaceous. During the Late Cretaceous to Paleocene, subduction of Atlantic crust was established along its northern margin, whilst to the southwest, an island arc collided with the northern Andes forming an east dipping subduction zone where Caribbean lithosphere was subducted beneath the South American margin. During

1955-569: Is linked to the world through the Arthur Napoleon Raymond Robinson International Airport (formerly Crown Point Airport) and Scarborough harbour. Domestic flights connect Tobago with Trinidad, and international flights connect with the Caribbean and Europe. There is a daily fast ferry service between Port of Spain and Scarborough. Tobago's economy is tightly linked with Trinidad's, which is based on liquefied natural gas (LNG), petrochemicals, and steel. Tobago

2070-719: Is no evidence for ice sheets at the poles during the Paleocene. The relatively cool conditions were brought to an end by the Thanetian Thermal Event, and the beginning of the PETM. This was one of the warmest times of the Phanerozoic eon, during which global mean surface temperatures increased to 31.6 °C. According to a study published in 2018, from about 56 to 48 Ma, annual air temperatures over land and at mid-latitude averaged about 23–29 °C (± 4.7 °C). For comparison, this

2185-611: Is prone to over-use. The Main Ridge Forest Reserve was named the World's Leading Ecotourism Destination by the World Travel Awards from 2003 to 2006 and the World's Leading Green Destination in 2007 and 2009. Forests on the Main Ridge were damaged by Hurricane Flora in 1963, and its forests continue to be susceptible to hurricane damage. Given the small size of the area, fires started in surrounding agricultural lands can penetrate deep into

2300-613: Is the main exposed portion of the Tobago terrane , a fragment of crustal material lying between the Caribbean and South American Plates . Tobago is primarily hilly, mountainous and of volcanic origin. The southwest of the island is flat and consists largely of coralline limestone . The mountainous spine of the island is called the Main Ridge . The highest point in Tobago is the 550 metres (1,800 ft) Pigeon Peak near Speyside . The climate

2415-524: Is the second series/epoch of the Paleogene, and lasted from 56.0 Ma to 33.9 Ma. It is divided into four stages: the Ypresian 56.0 Ma to 47.8 Ma; Lutetian 47.8 Ma to 41.2 Ma; Bartonian 41.2 Ma to 37.71 Ma; and, Priabonian 37.71 Ma to 33.9 Ma. The GSSP for the base of the Eocene is at Dababiya, near Luxor , Egypt and is marked by the start of a significant variation in global carbon isotope ratios, produced by

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2530-483: Is tropical, and the island lies just south of the Atlantic Main Development Region , making it vulnerable to occasional low-latitude tropical cyclones . Average rainfall varies between 3,800 mm (150 inches) on the Main Ridge to less than 1,250 mm (49 inches) in the southwest. There are two seasons: a wet season between June and December, and a dry season between January and May. The island

2645-505: The 2015 and 2020 Trinidad and Tobago general election . Historically, Tobago was divided into seven parishes (Saint Andrew, Saint David, Saint George, Saint John, Saint Mary, Saint Patrick and Saint Paul). In 1768 each parish of Tobago nominated representatives to the Tobago House of Assembly . On 20 October 1889 the British crown implemented a Royal Order in Council constituting Tobago as

2760-556: The Afar mantle plume began to impact the base of the African lithosphere. Rifting across the southern Red Sea began in the mid Oligocene, and across the central and northern Red Sea regions in the late Oligocene and early Miocene. Climatic conditions varied considerably during the Paleogene. After the disruption of the Chicxulub impact settled, a period of cool and dry conditions continued from

2875-646: The Farallon plate beneath the North American Plate. Along the central section of the North American margin, crustal shortening of the Cretaceous to Paleocene Sevier Orogen lessened and deformation moved eastward. The decreasing dip of the subducting Farallon Plate led to a flat-slab segment that increased friction between this and the base of the North American Plate. The resulting Laramide Orogeny , which began

2990-685: The Iberian and European plates led to the Pyrenean Orogeny and, as Adria pushed northwards the Alps and Carpathian orogens began to develop. The collision of Adria with Eurasia in the early Palaeocene was followed by a c.10 million year pause in the convergence of Africa and Eurasia, connected with the onset of the opening of the North Atlantic Ocean as Greenland rifted from the Eurasian Plate in

3105-575: The International Commission on Stratigraphy (ICS) ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype ) identifying the lower boundary of the stage. The Paleocene is the first series/epoch of the Paleogene and lasted from 66.0 Ma to 56.0 Ma. It is divided into three stages: the Danian 66.0 - 61.6 Ma; Selandian 61.6 - 59.2 Ma; and, Thanetian 59.2 - 56.0 Ma. The GSSP for

3220-525: The Kalina (mainland Caribs) called the island Urupina because of its resemblance to a big snail, while the Kalinago (Island Caribs) called it Aloubaéra , supposedly because it resembled the alloüebéra , a giant snake which was supposed to live in a cave on the island of Dominica . The earliest known record of the use of the name Tabaco to refer to the island is a Spanish royal order issued in 1511. That name

3335-624: The North America and Eurasian plates, and Australia and South America rifted from Antarctica , opening the Southern Ocean . Africa and India collided with Eurasia forming the Alpine-Himalayan mountain chains and the western margin of the Pacific Plate changed from a divergent to convergent plate boundary. The Alpine Orogeny developed in response to the collision between

3450-486: The Republic of Trinidad and Tobago . It is located 35 kilometres (22 mi) northeast of the larger island of Trinidad and about 160 kilometres (99 mi) off the northeastern coast of Venezuela . It lies to the southeast of Grenada and southwest of Barbados . Tobago was named Belaforme by Christopher Columbus "because from a distance it seemed beautiful". The Spanish friar Antonio Vázquez de Espinosa wrote that

3565-647: The San Andreas Fault . At the Paleogene-Neogene boundary, spreading ceased between the Pacific and Farallon plates and the Farallon Plate split again forming the present date Nazca and Cocos plates. The Kula Plate lay between Pacific Plate and North America. To the north and northwest it was being subducted beneath the Aleutian trench . Spreading between the Kula and Pacific and Farallon plates ceased c. 40 Ma and

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3680-492: The Tobago stream snake . The site has been designated an Important Bird Area (IBA) by BirdLife International because it supports significant populations of rufous-vented chachalacas , white-tailed sabrewings , copper-rumped hummingbirds and Venezuelan flycatchers . It is one of seven IBAs in Trinidad and Tobago. The white-tailed sabrewing is endemic to north-eastern Venezuela and the Main Ridge; after Hurricane Flora in 1963

3795-760: The Walt Disney Company as the setting for a film based upon the Johann Wyss novel Swiss Family Robinson . When producers saw the island for the first time, they "fell instantly in love". The script required animals, which were brought from all around the world, including eight dogs, two giant tortoises, forty monkeys, two elephants, six ostriches, four zebras, one hundred flamingos, six hyenas, two anacondas, and one tiger. Filming locations include Richmond Bay (the Robinsons beach), Mount Irvine Bay (the Pirates beach), and

3910-681: The 15 seats in the Assembly, with the Tobago Council of the People's National Movement led by Ancil Dennis controlling one seat since the December 2021 Tobago House of Assembly election . Tobago is represented by two seats in the Parliament of Trinidad and Tobago , Tobago East and Tobago West. The two seats are controlled by the Tobago Council of the People's National Movement , which won and retained them in

4025-738: The African and Eurasian plates during the closing of the Neotethys Ocean and the opening of the Central Atlantic Ocean. The result was a series of arcuate mountain ranges, from the Tell - Rif - Betic cordillera in the western Mediterranean through the Alps , Carpathians , Apennines , Dinarides and Hellenides to the Taurides in the east. From the Late Cretaceous into the early Paleocene, Africa began to converge with Eurasia. The irregular outlines of

4140-643: The Arctic Ocean, and by the late Eocene (c. 37 Ma) there is evidence of glaciation in Antarctica. Changes in deep ocean currents, as Australia and South America moved away from Antarctica opening the Drake and Tasmanian passages, were responsible for the drop in global temperatures. The warm waters of the South Atlantic, Indian and South Pacific oceans extended southward into the opening Southern Ocean and became part of

4255-648: The Australian Plate drifted slowly northwards. Collision between India and the West Burma block was complete by the late Oligocene. As the India-Eurasia collision continued, movement of material away from the collision zone was accommodated along, and extended, the already existing major strike slip systems of the region. During the Paleocene, seafloor spreading along the Mid-Atlantic Ridge propagated from

4370-408: The British and Northwest Atlantic volcanic provinces occurred mainly in the early Palaeocene, the latter associated with an increased spreading rate in the Labrador Sea, whilst northeast Atlantic magmatism occurred mainly during the early Eocene and is associated with a change in the spreading direction in the Labrador Sea and the northward drift of Greenland. The locations of the magmatism coincide with

4485-415: The British in 1814. In 1662, the Dutch brothers Adrian and Cornelius Lampsins were granted the title of Barons of Tobago, and ruled until the English captured the island in 1666. Adrian briefly recaptured Tobago in 1673, but was killed in battle when the English, under Sir Tobias Bridge , yet again took control of the island. From about 1672, during the temporary English rule of 1672–1674, Tobago had

4600-534: The Cayo tradition are known from Tobago. Tobago's location made it an important point of connection between the Kalinago of the Lesser Antilles and their Kalina allies and trading partners in the Guianas and Venezuela . In the 1630s Tobago was inhabited by the Kalina, while the neighbouring island of Grenada was shared by the Kalina and Kalinago. Columbus sighted Tobago on 14 August 1498, during his fourth voyage, but he did not land. The Spanish settlers in Hispaniola were authorised to conduct slave raids against

4715-428: The Central Atlantic northwards between North America and Greenland in the Labrador Sea (c. 62 Ma) and Baffin Bay (c. 57 Ma), and, by the early Eocene (c. 54 Ma), into the northeastern Atlantic between Greenland and Eurasia. Extension between North America and Eurasia, also in the early Eocene, led to the opening of the Eurasian Basin across the Arctic, which was linked to the Baffin Bay Ridge and Mid-Atlantic Ridge to

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4830-405: The Craig Hall Waterfalls. The treehouse was constructed in a 200-foot tall saman in the Goldsborough Bay area. After filming, locals convinced Disney, who had intended to remove all evidence of filmmaking, to let the treehouse remain, without interior furnishing. In 1960, the treehouse was listed for sale for $ 9,000, a fraction of its original cost, and became a popular attraction before the structure

4945-466: The Environment, a department of the Tobago House of Assembly . The Main Ridge Forest Reserve plays an important role in the protection of native biodiversity, particularly endemic plant species . The Main Ridge and the Northern Range (in northern Trinidad ) are the areas in the country which support the largest numbers of globally rare plant species. A gap analysis of endemic vascular plants of Trinidad and Tobago identified 15 endemic plant species in

5060-441: The Eocene (c. 45 Ma), subduction of the Farallon Plate along the Central American subduction zone was (re)established. Subduction along the northern section of the Caribbean volcanic arc ceased as the Bahamas carbonate platform collided with Cuba and was replaced by strike-slip movements as a transform fault, extending from the Mid-Atlantic Ridge, connected with the northern boundary of the Caribbean Plate. Subduction now focused along

5175-401: The Island of Tobago, who colonized the island intermittently between 1637 and 1690. Over the ensuing years, the Curonians ( Duchy of Courland ), Dutch, English, French, Spanish and Swedish had caused Tobago to become a focal point in repeated attempts of colonization, which led to the island having changed hands 33 times, the most in Caribbean history, before the Treaty of Paris ceded it to

5290-463: The Jan Mayen microcontinent part of the Eurasian Plate, where its remains now lie to the east and possibly beneath the southeast of Iceland. The North Atlantic Igneous Province stretches across the Greenland and northwest European margins and is associated with the proto-Icelandic mantle plume , which rose beneath the Greenland lithosphere at c. 65 Ma. There were two main phases of volcanic activity with peaks at c. 60 Ma and c. 55 Ma. Magmatism in

5405-434: The Kula Plate became part of the Pacific Plate. The Hawaiian-Emperor seamount chain formed above the Hawaiian hotspot . Originally thought to be stationary within the mantle, the hotspot is now considered to have drifted south during the Paleocene to early Eocene, as the Pacific Plate moved north. At c. 47 Ma, movement of the hotspot ceased and the Pacific Plate motion changed from northward to northwestward in response to

5520-405: The Late Cretaceous. The Kula-Farallon spreading ridge lay to its north until the Eocene (c. 55 Ma), when the northern section of the plate split forming the Vancouver/Juan de Fuca Plate . In the Oligocene (c. 28 Ma), the first segment of the Pacific–Farallon spreading ridge entered the North American subduction zone near Baja California leading to major strike-slip movements and the formation of

5635-465: The Late Cretaceous. At the Paleocene-Eocene boundary global temperatures rose rapidly with the onset of the Paleocene-Eocene Thermal Maximum (PETM). By the middle Eocene, temperatures began to drop again and by the late Eocene (c. 37 Ma) had decreased sufficiently for ice sheets to form in Antarctica. The global climate entered icehouse conditions at the Eocene-Oligocene boundary and the present day Late Cenozoic ice age began. The Paleogene began with

5750-508: The Main Ridge Forest Reserve. Main Ridge forms the mountainous backbone of the island of Tobago, which is the smaller and more northern of the two main islands that make up the southern Caribbean nation of Trinidad and Tobago. The chain of hills is 29 km (18 mi) long and runs from the southwest to the northeast, roughly parallel to the orientation of the island. Main Ridge reaches an elevation of 572 metres (1,877 ft) above sea level at Centre Hill, but lacks any well-defined peaks. To

5865-427: The Mid-Atlantic Ridge) propagating northwards and splitting off the Jan Mayen microcontinent . After c. 33 Ma seafloor spreading in Labrador Sea and Baffin Bay gradually ceased and seafloor spreading focused along the northeast Atlantic. By the late Oligocene, the plate boundary between North America and Eurasia was established along the Mid-Atlantic Ridge, with Greenland attached to the North American plate again, and

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5980-420: The Neotethys resulted in the obuction of ocean crust onto the Arabian margin in the Late Cretaceous to Paleocene, with break-off of the subducted oceanic plate close to the Arabian margin occurring during the Eocene. Continental collision began during the Eocene c. 35 Ma and continued into the Oligocene to c. 26 Ma. The Indian continent rifted from Madagascar at c. 83 Ma and drifted rapidly (c. 18 cm/yr in

6095-435: The Palaeocene. Convergence rates between Africa and Eurasia increased again in the early Eocene and the remaining oceanic basins between Adria and Europe closed. Between about 40 and 30 Ma, subduction began along the western Mediterranean arc of the Tell, Rif, Betic and Apennine mountain chains. The rate of convergence was less than the subduction rate of the dense lithosphere of the western Mediterranean and roll-back of

6210-427: The Paleocene) northwards towards the southern margin of Eurasia. A rapid decrease in velocity to c. 5 cm/yr in the early Eocene records the collision of the Tethyan (Tibetan) Himalayas , the leading edge of Greater India, with the Lhasa Terrane of Tibet (southern Eurasian margin), along the Indus-Yarling-Zangbo suture zone . To the south of this zone, the Himalaya are composed of metasedimentary rocks scraped off

6325-505: The Paleogene, achieving a diverse array of morphologies. The Paleogene is marked by considerable changes in climate from the Paleocene–Eocene Thermal Maximum , through global cooling during the Eocene to the first appearance of permanent ice sheets in the Antarctic at the beginning of the Oligocene. The Paleogene is divided into three series / epochs : the Paleocene, Eocene, and Oligocene. These stratigraphic units can be defined globally or regionally. For global stratigraphic correlation,

6440-443: The THA. The population was 60,874 at the 2011 census. The capital, Scarborough , has a population of 17,537. While Trinidad is multiethnic , Tobago's population is primarily of African descent, with a growing proportion of Trinidadians of East Indian descent and Europeans. Between 2000 and 2011, the population of Tobago grew by 12.55 percent, making it one of the fastest-growing areas of Trinidad and Tobago . Tobago's main economy

6555-428: The West Burma block and the development of a major north-south transform fault along the margin of Southeast Asia to the south. Between c. 60 and 50 Ma, the leading northeastern edge of Greater India collided with the West Burma block resulting in deformation and metamorphism . During the middle Eocene, north-dipping subduction resumed along the southern edge of Southeast Asia, from west Sumatra to West Sulawesi, as

6670-460: The airport. The island has some of the best diving sites in the Caribbean. There are three wrecks located around its shores, but the one usually considered the best is the Maverick Ferry , which used to travel between Trinidad and Tobago. The ferry is 350 feet (110 metres) long and has been sunk in 30 metres (98 feet) just off Rocky Point, Mt. Irvine. The top of the wreck is at 15 metres (49 feet). The wreck has an abundance of marine life, including

6785-410: The area. Sixteen mammalian species, including the nine-banded armadillo , crab-eating raccoon and red-rumped agouti are present. The ichthyofauna is limited - only four of Tobago's 13 freshwater fish species are found in its rivers and streams. The spotted algae-eating goby, Sicydium punctatum , is the most widespread fish species in the area, while the jumping guabine, Anablepsoides hartii ,

6900-402: The area; species distribution modelling suggested that the reserve included suitable habitat for another nine endemic plant species. Main Ridge is an important ecotourism destination and birdwatching site. The site has a visitor centre and a network of nine trails which allow access to the site. Additional trails were constructed to reduce pressure on the most popular trail, Gilpin Trace, which

7015-456: The base of the Cenozoic, Paleogene and Paleocene is at Oued Djerfane, west of El Kef , Tunisia . It is marked by an iridium anomaly produced by an asteroid impact, and is associated with the Cretaceous–Paleogene extinction event. The boundary is defined as the rusty colored base of a 50 cm thick clay , which would have been deposited over only a few days. Similar layers are seen in marine and continental deposits worldwide. These layers include

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7130-435: The base of the Oligocene is at Massignano , near Ancona , Italy . The extinction the hantkeninid planktonic foraminifera is the key marker for the Eocene-Oligocene boundary, which was a time of climate cooling that led to widespread changes in fauna and flora. The final stages of the breakup of Pangaea occurred during the Paleogene as Atlantic Ocean rifting and seafloor spreading extended northwards, separating

7245-427: The brief but intense " impact winter " caused by the Chicxulub impact , which was followed by an abrupt period of warming. After temperatures stabilised, the steady cooling and drying of the Late Cretaceous-Early Paleogene Cool Interval that had spanned the last two ages of the Late Cretaceous continued, with only the brief interruption of the Latest Danian Event (c. 62.2 Ma) when global temperatures rose. There

7360-406: The cold circumpolar current. Dense polar waters sank into the deep oceans and moved northwards, reducing global ocean temperatures. This cooling may have occurred over less than 100,000 years and resulted in a widespread extinction in marine life. By the Eocene-Oligocene boundary, sediments deposited in the ocean from glaciers indicate the presence of an ice sheet in western Antarctica that extended to

7475-428: The competition from sugar with other European countries, marked the end of the sugar trade. In 1889, the island became a ward of Trinidad. Without sugar, the islanders had to grow other crops, planting acres of limes, coconuts and cocoa and exporting their produce to Trinidad. In 1963, Hurricane Flora ravaged Tobago, destroying the villages and crops. A restructuring programme followed and attempts were made to diversify

7590-442: The continental margins, including the Adriatic promontory (Adria) that extended north from the African Plate, led to the development of several short subduction zones, rather than one long system. In the western Mediterranean, the European Plate was subducted southwards beneath the African Plate, whilst in the eastern Mediterranean, Africa was subducted beneath Eurasia along a northward dipping subduction zone. Convergence between

7705-430: The cooler oceans also reduced moisture in the atmosphere and increased aridity. By the early Oligocene, the North American and Eurasian tropical and subtropical forests were replaced by dry woodlands and widespread grasslands. The Early Oligocene Glacial Maximum lasted for about 200,000 years, and the global mean surface temperature continued to decrease gradually during the Rupelian . A drop in global sea levels during

7820-438: The dancing blue-backed manakin ), mammals, frogs, (non-venomous) snakes, butterflies and other invertebrates. Tobago also has nesting beaches for the leatherback turtle , which come to shore between April and July. The island of Tobago has multiple coral reef ecosystems. The Buccoo Reef , the Culloden Reef and Speyside Reef are the three largest coral reef marine ecosystems in Tobago. These coral reef systems protect

7935-421: The development of the Rocky Mountains , was a broad zone of thick-skinned deformation , with faults extending to mid-crustal depths and the uplift of basement rocks that lay to the east of the Sevier belt, and more than 700km from the trench. With the Laramide uplift the Western Interior Seaway was divided and then retreated. During the mid to late Eocene (50–35 Ma), plate convergence rates decreased and

8050-517: The dip of the Farallon slab began to steepen. Uplift ceased and the region largely levelled by erosion . By the Oligocene, convergence gave way to extension, rifting and widespread volcanism across the Laramide belt. Ocean-continent convergence accommodated by east dipping subduction zone of the Farallon Plate beneath the western edge of South America continued from the Mesozoic. Over the Paleogene, changes in plate motion and episodes of regional slab shallowing and steepening resulted in variations in

8165-434: The eastern border of Iraq to the Makran coast in southern Iran . It formed as a result of the convergence and collision of the Arabian and Eurasian plates as the Neotethys Ocean closed and is composed sediments scrapped from the descending Arabian Plate. From the Late Cretaceous, a volcanic arc developed on the Eurasia margin as the Neotethys crust was subducted beneath it. A separate intra-oceanic subduction zone in

8280-472: The economy changed direction away from cash crop agriculture and toward tourism. Hurricane Ivan , while less severe than Flora, also caused significant damage in 2004. Central and local government functions in Tobago are handled by the Tobago House of Assembly . The current Chief Secretary of Tobago is Farley Chavez Augustine from the Progressive Democratic Patriots , which controls 14 of

8395-529: The economy. The development of a tourist industry began. Trinidad and Tobago obtained independence from the British Empire in August 1962 and became a republic on 31 August 1976. Tobago has a land area of 300 km and is approximately 40 kilometres (25 miles) long and 10 kilometres (6.2 miles) wide. It is located at latitude 11° 15' N, longitude 60° 40' W, slightly north of Trinidad. The island of Tobago

8510-470: The extinction of the non-avian dinosaurs, pterosaurs, marine reptiles, and primitive fish groups. Mammals continued to diversify from relatively small, simple forms into a highly diverse group ranging from small-bodied forms to very large ones, radiating into multiple orders and colonizing the air and marine ecosystems by the Eocene . Birds , the only surviving group of dinosaurs, quickly diversified from

8625-405: The fleet of Comte de Grasse landed troops on the island under the command of General Marquis de Bouillé. By 2 June 1781, they had successfully gained control of the island. In 1814, when the island again came under British control, another phase of successful sugar-production began. But a severe hurricane in 1847, combined with the collapse of plantation underwriters, end of slavery in 1834 and

8740-523: The greenhouse conditions. The initial rise in global temperatures was related to the intrusion of magmatic sills into organic-rich sediments during volcanic activity in the North Atlantic Igneous Province, between about 56 and 54 Ma, which rapidly released large amounts of greenhouse gases into the atmosphere. This warming led to melting of frozen methane hydrates on continental slopes adding further greenhouses gases. It also reduced

8855-406: The hills. Commercial and subsistence hunting and overuse for tourism pose threats to biodiversity, while the chytrid fungus Batrachochytrium dendrobatidis poses a threat to endemic amphibians. 11°16′35″N 60°37′00″W  /  11.27639°N 60.61667°W  / 11.27639; -60.61667 Tobago Tobago ( / t ə ˈ b eɪ ɡ oʊ / ) is an island and ward within

8970-551: The hummingbird was thought to have been extirpated from Tobago, but was rediscovered in 1974. The Main Ridge Forest Reserve, a 3,937-hectare (9,730-acre) forest reserve , is one of the oldest protected areas in the world. The Trinidad and Tobago government submitted the Main Ridge Forest Reserve as a tentative listing for a UNESCO World Heritage Site in 2011. The area is managed by the Department of Natural Resources and

9085-403: The intersection of propagating the rifts and large-scale, pre-existing lithospheric structures, which acted as channels to the surface for the magma . The arrival of the proto-Iceland plume has been considered the driving mechanism for rifting in the North Atlantic. However, that rifting and initial seafloor spreading occurred prior to the arrival of the plume, large scale magmatism occurred at

9200-751: The introduction of the Barrancoid culture, either by trade or a combination of trade and settlement. After 650 CE, the Saladoid culture was replaced by the Troumassoid tradition in Tobago. Troumassoid traditions were once thought to represent the settlement of the Island Caribs in the Lesser Antilles and Tobago, but this is now associated with the Cayo ceramic tradition. No archaeological sites exclusively associated with

9315-529: The iridium anomaly, microtektites , nickel -rich spinel crystals and shocked quartz , all indicators of a major extraterrestrial impact. The remains of the crater are found at Chicxulub on the Yucatan Peninsula in Mexico . The extinction of the non-avian dinosaurs , ammonites and dramatic changes in marine plankton and many other groups of organisms, are also used for correlation purposes. The Eocene

9430-422: The island in a royal order issued in 1511. These raids, which continued until at least the 1620s, decimated the island's population. In 1628, Dutch settlers established the first European settlement in Tobago, a colony they called Nieuw Walcheren at Great Courland Bay. They also built a fort, Nieuw Vlissingen, near the modern town of Plymouth . The settlement was abandoned in 1630 after indigenous attacks, but

9545-523: The island of Tobago. The island of Tobago is the main exposed portion of the Tobago terrane , a fragment of crustal material lying between the Caribbean and South American Plates . The rocks of the NCSG are metavolcanic ; the underlying igneous rock was laid down during the Late Jurassic or Early Cretaceous . They underwent metamorphosis prior to the mid Cretaceous , when additional volcanic intrusion formed

9660-448: The large area of protected forest in the centre and north of the main island and on Little Tobago , a small island off the main island's northeast tip. The southwestern tourist area around Crown Point, Store Bay, Buccoo Reef, and Pigeon Point has large expanses of sand and is dominated by resort-type developments. Tobago has many idyllic beaches along its coastline, especially those at Castara , Bloody Bay, and Englishman's Bay . Tobago

9775-695: The magnitude of crustal shortening and amounts of magmatism along the length of the Andes . In the Northern Andes, an oceanic plateau with volcanic arc was accreted during the latest Cretaceous and Paleocene, whilst the Central Andes were dominated by the subduction of oceanic crust and the Southern Andes were impacted by the subduction of the Farallon-East Antarctic ocean ridge. The Caribbean Plate

9890-658: The mid Oligocene. Rifting between the Antarctic Peninsula and the southern tip of South America formed the Drake Passage and opened the Southern Ocean also during this time, completing the breakup of Gondwana. The opening of these passages and the creation of the Southern Ocean established the Antarctic Circumpolar Current . Glaciers began to build across the Antarctica continent that now lay isolated in

10005-546: The northern margin of India during the opening of the Neotethys. The Tethyan Himalaya block lay along its northern edge, with the Neotethys Ocean lying between it and southern Eurasia. Debate about the amount of deformation seen in the geological record in the India–Eurasia collision zone versus the size of Greater India, the timing and nature of the collision relative to the decrease in plate velocity, and explanations for

10120-544: The northwest it is bounded by the Caribbean Sea and by the Southern Tobago fault system to the southeast. Rainfall averages about 2,800 millimetres (110 in) per year. Most streams run along oblique-slip faults with a northwest orientation. Major streams draining the Main Ridge include the Coffee, Hillsborough, Goldsborough, and Queens Rivers. Streams which drain to the northwest are short and steep, while those which drain to

10235-455: The now subducted Indian continental crust and mantle lithosphere as the collision progressed. Palaeomagnetic data place the present day Indian continent further south at the time of collision and decrease in plate velocity, indicating the presence of a large region to the north of India that has now been subducted beneath the Eurasian Plate or incorporated into the mountain belt. This region, known as Greater India, formed by extension along

10350-619: The ocean. The development of the circumpolar current led to changes in the oceans, which in turn reduced atmospheric CO 2 further. Increasing upwellings of cold water stimulated the productivity of phytoplankton , and the cooler waters reduced the rate of bacterial decay of organic matter and promoted the growth of methane hydrates in marine sediments. This created a positive feedback cycle where global cooling reduced atmospheric CO 2 and this reduction in CO 2 lead to changes which further lowered global temperatures. The decrease in evaporation from

10465-553: The onset of subduction along its western margin. This resulted in a 60 degree bend in the seamount chain. Other seamount chains related to hotspots in the South Pacific show a similar change in orientation at this time. Slow seafloor spreading continued between Australia and East Antarctica. Shallow water channels probably developed south of Tasmania opening the Tasmanian Passage in the Eocene and deep ocean routes opening from

10580-606: The palm Euterpe broadwayi more common on exposed ridges and summits. Moist lowland forest dominates the lower-lying portions of the Main Ridge. The forests experienced limited human disturbance prior to the 1940s, but were badly damaged by Hurricane Flora in 1963. Plant species endemic to Tobago which have been recorded from Main Ridge include Odontonema brevipes , Duguetia tobagensis , Phyllanthus acacioides , Besleria seitzii , Cybianthus pittieri , Pilea tobagensis , and Justicia tobagensis . Some 210 species of birds, 24 snakes and 16 lizards have been recorded from

10695-538: The rate of burial of organic matter as higher temperatures accelerated the rate of bacterial decomposition which released CO 2 back into the oceans. The (relatively) sudden climatic changes associated with the PETM resulted in the extinction of some groups of fauna and flora and the rise of others. For example, with the warming of the Arctic Ocean, around 70% of deep sea foraminifera species went extinct, whilst on land many modern mammals, including primates , appeared. Fluctuating sea levels meant, during low stands,

10810-413: The reserve "for the purpose of attracting frequent showers of rain upon which the fertility of lands in these climates doth entirely depend". This action produced one of the oldest protected areas in the world geared towards conservation and has been described as "the first act in the modern environmental movement". Beginning in 1904, the rain reserve was combined with adjacent Crown lands and proclaimed

10925-580: The return to British control led to a rapid conversion of the island to a plantation economy. Under the direction of the Board of Trade , the island was surveyed, divided into 100–500-acre (40–202 ha) plots, and sold to planters. The upper portions of the Main Ridge were reserved as "Woods for the Protection of the Rains" and thus remained uncleared and uncultivated. The decision to preserve forests to maintain rainfall

11040-587: The rocks of the Tobago Volcanic Group . A combination of uplift, erosion, and faulting during the late Mesozoic and Paleogene led to the elevated horst block separated from the half graben of the southern lowlands by the Southern Tobago fault system. Main Ridge is dominated by lower montane rain forest (according to John Stanley Beard 's classification of the vegetation of Tobago). In Tobago, these forests are characterised by an emergent canopy of Licania biglandulosa and Byrsonima spicata , with

11155-415: The shores of Tobago from eroding. Little Tobago , the small neighbouring island, supports some of the best dry forest remaining in Tobago. Little Tobago and St Giles Island are important seabird nesting colonies, with red-billed tropicbirds , magnificent frigatebirds and Audubon's shearwaters , among others. Coral reefs have been damaged recently by silt and mud runoff during construction of

11270-462: The size and location of the island in Robinson Crusoe , described as being located close to Trinidad and the mouth of Orinoco . However, the book is generally thought to be based on the experiences of Alexander Selkirk , who was marooned in the Pacific's Juan Fernández Islands , on the island later named after Robinson Crusoe . On Tobago, there is Crusoe Cave . In 1958, Tobago was chosen by

11385-503: The south polar region and surrounded by cold ocean waters. These changes contributed to the fall in global temperatures and the beginning of icehouse conditions. Extensional stresses from the subduction zone along the northern Neotethys resulted in rifting between Africa and Arabia, forming the Gulf of Aden in the late Eocene. To the west, in the early Oligocene, flood basalts erupted across Ethiopia , northeast Sudan and southwest Yemen as

11500-601: The south via major strike slip faults. From the Eocene and into the early Oligocene, Greenland acted as an independent plate moving northwards and rotating anticlockwise. This led to compression across the Canadian Arctic Archipelago , Svalbard and northern Greenland resulting in the Eureka Orogeny . From c. 47 Ma, the eastern margin of Greenland was cut by the Reykjanes Ridge (the northeastern branch of

11615-529: The southeast are longer, with better-developed courses. Waterfalls, including the Argylle Waterfall (Tobago's highest) occur at major transitions between rock types. The northeastern slopes are steeper than the southwestern ones and are among the most landslide-prone parts of the island. Main Ridge is primarily underlain by the North Coast Schist Group (NCSG), which occupies the northern third of

11730-511: The southern Caribbean arc ( Lesser Antilles ). By the Oligocene, the intra-oceanic Central American volcanic arc began to collide with northwestern South American. At the beginning of the Paleogene, the Pacific Ocean consisted of the Pacific, Farallon, Kula and Izanagi plates. The central Pacific Plate grew by seafloor spreading as the other three plates were subducted and broken up. In

11845-518: The southern Pacific, seafloor spreading continued from the Late Cretaceous across the Pacific–Antarctic, Pacific-Farallon and Farallon–Antarctic mid ocean ridges. The Izanagi-Pacific spreading ridge lay nearly parallel to the East Asian subduction zone and between 60–50 Ma the spreading ridge began to be subducted. By c. 50 Ma, the Pacific Plate was no longer surrounded by spreading ridges, but had

11960-616: The subducting slab led to the arcuate structure of these mountain ranges. In the eastern Mediterranean, c. 35 Ma, the Anatolide-Tauride platform (northern part of Adria) began to enter the trench leading to the development of the Dinarides, Hellenides and Tauride mountain chains as the passive margin sediments of Adria were scrapped off onto the Eurasia crust during subduction. The Zagros mountain belt stretches for c. 2000 km from

12075-426: The unusually high velocity of the Indian plate have led to several models for Greater India: 1) A Late Cretaceous to early Paleocene subduction zone may have lain between India and Eurasia in the Neotethys, dividing the region into two plates, subduction was followed by collision of India with Eurasia in the middle Eocene. In this model Greater India would have been less than 900 km wide; 2) Greater India may have formed

12190-411: The very few neognath and paleognath clades that survived the extinction event, also radiating into multiple orders, colonizing different ecosystems and achieving an extreme level of morphological diversity. Percomorph fish, the most diverse group of vertebrates today, first appeared near the end of the Cretaceous but saw a very rapid radiation into their modern order and family-level diversity during

12305-441: The world. It is a popular site for birdwatching and ecotourism . Main Ridge provides important habitat for native plants and animals, including several species endemic to Tobago. The Treaty of Paris in 1763 ended Tobago's status as a neutral territory and made it a British colony. The Treaty of Aix-la-Chappelle in 1748 had designated Tobago neutral territory and left it in the hands of its remaining indigenous population, but

12420-588: Was 10 to 15 °C higher than the current annual mean temperatures in these areas. This rapid rise in global temperatures and intense greenhouse conditions were due to a sudden increase in levels of atmospheric carbon dioxide (CO 2 ) and other greenhouse gases . An accompanying rise in humidity is reflected in an increase in kaolinite in sediments, which forms by chemical weathering in hot, humid conditions. Tropical and subtropical forests flourished and extended into polar regions. Water vapour (a greenhouse gas) associated with these forests also contributed to

12535-540: Was destroyed by Hurricane Flora in 1963. The tree still remains, however, and is located on the property of the Roberts Auto Service and Tyre Shop, located in Goldsborough, just off of Windward Road. A local Tobago resident says, "The tree has fallen into obscurity; only a few of the older people knew of its significance. As a matter of fact, not many people know of the film Swiss Family Robinson , much less that it

12650-534: Was driven by the efforts of Soame Jenyns , a commissioner of the Board of Trade and Member of Parliament. Jenyns was convinced of the importance of forests for preserving rainfall through the work of Stephen Hales on plant physiology and transpiration . It took Jenyns eleven years to convince the British Parliament of the importance of the endeavour, but on 13 April 1776, Parliament passed an ordinance establishing

12765-625: Was filmed here in Tobago." The Tobago Forest Reserve (Main Ridge Reserve) is the oldest protected rain forest in the Western hemisphere and is biodiverse. It was designated a protected Crown reserve on 17 April 1776 after representations by Soame Jenyns , a Member of Parliament in Britain responsible for Tobago's development. It has remained a protected area since. This forested area has great biodiversity , including many species of birds (such as

12880-795: Was inspired by the resemblance of the shape of the island to the fat cigars smoked by the Taíno inhabitants of the Greater Antilles. Tobago was settled by indigenous people belonging to the Ortoiroid cultural tradition some time between 3500 and 1000 BCE. In the first century of the Common Era , Saladoid people settled in Tobago. They brought with them pottery-making and agricultural traditions, and are likely to have introduced crops which included cassava , sweet potatoes , Indian yam , tannia and corn . Saladoid cultural traditions were later modified by

12995-718: Was re-established in 1633. The new colony was destroyed by the Spanish in Trinidad after the Dutch supported a Nepoyo-led revolt in Trinidad. Attempts by the English to colonize Tobago in the 1630s and 1640s also failed due to indigenous resistance. The indigenous population also prevented European colonization in the 1650s, including an attempt by the Polish–Lithuanian Commonwealth , but the Polish or Lithuanian explorers did not colonize

13110-482: Was seen throughout the world after hosting the popular golf show "Shell's Wonderful World of Golf". The course is built amongst coconut palms and has a view of the Caribbean Sea from almost every hole. Formerly known as Tobago Plantations Golf Course, the recently renamed Magdalena Grand Hotel & Golf Club was opened in 2001 and has hosted the European Seniors Tour on three occasions. Tobago roughly matches

13225-440: Was struck by Hurricane Flora in 1963. The effects were so severe that they changed the face of Tobago's economy. The hurricane laid waste to the banana, coconut, and cacao plantations that largely sustained the economy, and it wreaked considerable damage on the largely pristine tropical rainforest that makes up a large proportion of the interior of the island's northern half. Many of the plantations were subsequently abandoned, and

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