Soufrière Volcanic Center
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Soufrière Volcanic Center
Qualibou, also known as the Soufrière Volcanic Center, is a 3.5 × 5 km-wide caldera on the island of Saint Lucia that formed between 32,000 and 39,000 years ago. This eruption also formed the Choiseul Tuff which covers the southeastern portion of the island. The Pitons are two large lava domes that formed before the formation of the caldera; ever since then, other domes have filled the caldera floor. There was a phreatic eruption in 1766 that deposited volcanic ash over a wide area. Sulphur Springs is an active geothermal Geothermal is related to energy and may refer to: * Geothermal energy, useful energy generated and stored in the Earth * Geothermal activity, the range of natural phenomena at or near the surface, associated with release of the Earth's internal he ... area located roughly in the center of the caldera. In 1990, 1999 and 2000 there were shallow volcanic earthquakes located 6 km ESE of the caldera. Gallery Image:Sulphur_Springs_2003.jpg, Sulp ...
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Mount Gimie
Mount Gimie is the tallest mountain on the island of Saint Lucia. It is located in the Canaries Quarter, Canaries District on the west side of Saint Lucia. The mountain's peak reaches . It is covered by lush tropical rainforest and was formed as the result of intense volcanic activity 200,000 to 300,000 years ago. Mount Gimie is still volcanic and so are many other of the Pitons (Saint Lucia), Pitons (a couple of volcanic plugs in which Mount Gimie belongs). References

Mountains of Saint Lucia Highest points of countries Volcanoes of Saint Lucia {{Highest points of North America ...
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Saint Lucia
Saint Lucia is an island country of the West Indies in the eastern Caribbean. Part of the Windward Islands of the Lesser Antilles, it is located north/northeast of the island of Saint Vincent (Saint Vincent and the Grenadines), Saint Vincent, northwest of Barbados and south of Martinique. It covers a land area of with an estimated population of over 180,000 people as of 2018. The nation's capital and largest city is Castries. The first proven inhabitants of the island, the Arawaks, are believed to have been the first to settle on the island in 200–400 AD. In 800 AD, the island was taken over by the Kalinago. The French people, French were the first European colonization of the Americas, European colonists to settle on the island, and they signed a treaty with the native Caribs in 1660. The English people, English took control of the island in 1663. In ensuing years, Kingdom of England, England and Kingdom of France, France fought 14 times for control of the island; conseq ...
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Caribbean
The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America to the west, and South America to the south, it comprises numerous List of Caribbean islands, islands, cays, islets, reefs, and banks. It includes the Lucayan Archipelago, Greater Antilles, and Lesser Antilles of the West Indies; the Quintana Roo Municipalities of Quintana Roo#Municipalities, islands and Districts of Belize#List, Belizean List of islands of Belize, islands of the Yucatán Peninsula; and the Bay Islands Department#Islands, Bay Islands, Miskito Cays, Archipelago of San Andrés, Providencia and Santa Catalina, Archipelago of San Andrés, Providencia, and Santa Catalina, Corn Islands, and San Blas Islands of Central America. It also includes the coastal areas on the Mainland, continental mainland of the Americas bordering the ...
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Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have ...
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Soufrière, Saint Lucia
Soufrière is a town on the West Coast of Saint Lucia, in the eastern Caribbean Sea. The town and the surrounding district has a population of 7,935. It was colonized by the French and was the original capital of the island. History French colonizers built large estates in Soufrière, and their descendants still live in the area. The French Revolution of 1789 resulted in many Royalists being executed and the enslaved Africans were released from enslavement. However, Napoleon reintroduced slavery when he came to power. The British invaded St Lucia shortly afterwards, but the enslaved Africans and French deserters fought them in a guerrilla campaign until 1803 when they were defeated and St Lucia became a British colony. Also, during that time, Castries became the capital of St Lucia. Over the years, Soufrière has had to deal with hurricanes in 1780, 1817, 1831, 1898 and 1980, a major fire in 1955 and an earthquake in 1991. Many of these events have resulted in the town being r ...
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Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have ...
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Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as ''tuffaceous'' (for example, ''tuffaceous sandstone''). A pyroclastic rock containing 25–75% volcanic bombs or volcanic blocks is called tuff breccia. Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called t ...
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Lava Dome
In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on Earth form lava domes. The geochemistry of lava domes can vary from basalt (e.g. Semeru, 1946) to rhyolite (e.g. Chaiten, 2010) although the majority are of intermediate composition (such as Santiaguito, dacite-andesite, present day). The characteristic dome shape is attributed to high viscosity that prevents the lava from flowing very far. This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite. Existence of lava domes has been suggested for some domed structures on the ...
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Phreatic Eruption
A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption, occurs when magma heats ground water or surface water. The extreme temperature of the magma (anywhere from ) causes near-instantaneous evaporation of water to steam, resulting in an explosion of steam, water, ash, rock, and volcanic bombs. At Mount St. Helens in Washington state, hundreds of steam explosions preceded the 1980 Plinian eruption of the volcano. A less intense geothermal event may result in a mud volcano. Phreatic eruptions typically include steam and rock fragments; the inclusion of liquid lava is unusual. The temperature of the fragments can range from cold to incandescent. If molten magma is included, volcanologists classify the event as a phreatomagmatic eruption. These eruptions occasionally create broad, low-relief craters called '' maars''. Phreatic explosions can be accompanied by carbon dioxide or hydrogen sulfide gas-emissions. Carbon diox ...
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Volcanic Ash
Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as '' tephra''), including particles larger than 2 mm. Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere. The force of the gases shatters the magma and propels it into the atmosphere where it solidifies into fragments of volcanic rock and glass. Ash is also produced when magma comes into contact with water during phreatomagmatic eruptions, causing the water to explosively flash to steam leading to shattering of magma. Once in the air, ash is transported by wind up to thousands of kilometres away. Due to its wide dispersal, ash can have a number of impacts on society, including animal a ...
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Sulphur Springs, Saint Lucia
Sulphur Springs is a geothermal field on the island of Saint Lucia. It is located to the southwest in the district of Soufriere, a name given by the French meaning 'sulphur mine', because of the proximity of the town to the site. It is the most popular tourist destination in Saint Lucia, with approximately 200,000 annual patrons to the park, and is known as 'the world's only drive-in volcano'. Mine A sulphur mine was operated by Bennett and Wood from 1836 until 1840. Maximum production occurred in 1836, with 540 tons of sulphur exported. Activity The Sulphur Springs emerged from a weak spot in the crust of the enormous collapsed crater creating an upheaval of lava approximately 300,00 years ago. The most recent volcanic eruption from the Sulphur Springs, recorded as a minor explosion, occurred in 1766. Springs The water located at the center of the springs boils at roughly 212 Fahrenheit (100 Celsius) creating large plumes of steam. The water coming out of the spring is b ...
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