|
Tupungatito
Volcán Tupungatito is the northernmost historically active stratovolcano of the southern Andes. Part of the Chilean Andes' volcanic segment, it is the northernmost member of the Southern Volcanic Zone (SVZ), which is one of several distinct volcanic belts in the Andes. Over 70 Pleistocene or Holocene age volcanoes make up this volcanic belt, which on average has one eruption per year. Tupungatito lies in proximity to the border between Argentina and Chile, 50 miles east of the Chilean capital Santiago. It is a group of volcanic craters and a pyroclastic cone associated with a wide caldera, and lies just southwest of the Tupungato volcano. The caldera is filled with ice, and glaciers on the volcano are important sources of water for the Rio Maipo river and Santiago. Volcanism is caused by the subduction of the Nazca Plate underneath the South America Plate. Tupungatito formed less than 100,000 years ago and has had a number of historical eruptions, the latest in 1987, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tupungato
Tupungato, one of the highest mountains in the Americas, is a massive Andes, Andean lava dome dating to Pleistocene times. It lies on the Argentina–Chile border, between the Chilean Metropolitan Region (near a major international highway about east of Santiago, Chile, Santiago) and the Argentina, Argentine province of Mendoza province, Mendoza, about south of Aconcagua, the highest peak of both the Southern Hemisphere, Southern and Western Hemisphere, Western hemispheres. Immediately to its southwest is the active Tupungatito volcano (literally, ''little Tupungato''), which last erupted in 1987. Tupungato Department, an important Argentine wine-producing region in Mendoza province, is named for the volcano. Recent Chilean mapping indicates it has a summit elevation of 6635 m. 1947 plane crash On 2 August 1947, the airliner ''Star Dust (aircraft), Star Dust'', an Avro Lancastrian carrying six passengers and five crew over the Andes range, crashed into a steep glacier hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago De Chile
Santiago (, ; ), also known as Santiago de Chile (), is the capital city, capital and largest city of Chile and one of the largest cities in the Americas. It is located in the country's Chilean Central Valley, central valley and is the center of the Santiago Metropolitan Region, which has a population of seven million, representing 40% of Chile's total population. Most of the city is situated between above mean sea level, above sea level. Founded in 1541 by the Spanish conquistador Pedro de Valdivia, Santiago has served as the capital city of Chile since colonial times. The city features a downtown core characterized by 19th-century neoclassical architecture and winding side streets with a mix of Art Deco, Gothic Revival, and other styles. Santiago's cityscape is defined by several Inselberg, standalone hills and the fast-flowing Mapocho River, which is lined by parks such as Parque Bicentenario, Parque Forestal, and Parque de la Familia. The Andes, Andes Mountains are visibl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago, Chile
Santiago (, ; ), also known as Santiago de Chile (), is the capital and largest city of Chile and one of the largest cities in the Americas. It is located in the country's central valley and is the center of the Santiago Metropolitan Region, which has a population of seven million, representing 40% of Chile's total population. Most of the city is situated between above sea level. Founded in 1541 by the Spanish conquistador Pedro de Valdivia, Santiago has served as the capital city of Chile since colonial times. The city features a downtown core characterized by 19th-century neoclassical architecture and winding side streets with a mix of Art Deco, Gothic Revival, and other styles. Santiago's cityscape is defined by several standalone hills and the fast-flowing Mapocho River, which is lined by parks such as Parque Bicentenario, Parque Forestal, and Parque de la Familia. The Andes Mountains are visible from most parts of the city and contribute to a smog problem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Cone
Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone with a central crater. Volcanic cones are of different types, depending upon the nature and size of the fragments ejected during the eruption. Types of volcanic cones include stratocones, spatter cones, tuff cones, and cinder cones. Stratocone Stratocones are large cone-shaped volcanoes made up of lava flows, explosively erupted pyroclastic rocks, and igneous intrusives that are typically centered around a cylindrical vent. Unlike shield volcanoes, they are characterized by a steep profile and periodic, often alternating, explosive eruptions and effusive eruptions. Some have collapsed craters called calderas. The central core of a stratocone is commonly dominated by a central core of intrusive rocks that range from around to over several kilometers in diameter. This central core is surrounded by multiple generations of lav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subduction
Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at the convergent boundaries between tectonic plates. Where one tectonic plate converges with a second plate, the heavier plate dives beneath the other and sinks into the mantle. A region where this process occurs is known as a subduction zone, and its surface expression is known as an arc-trench complex. The process of subduction has created most of the Earth's continental crust. Rates of subduction are typically measured in centimeters per year, with rates of convergence as high as 11 cm/year. Subduction is possible because the cold and rigid oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle. Once initiated, stable subduction is driven mostly by the negative buoyancy of the dense subducting lithosphere. The down-going slab sinks into the mantle largely under its own ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colonial Era
Colonial period (a period in a country's history where it was subject to management by a colonial power) may refer to: Continents *European colonization of the Americas * Colonisation of Africa * Western imperialism in Asia Countries * Colonial Chile * Spanish conquest of Guatemala * Viceroyalty of Peru * Colonial history of the United States * British Raj, British colonial rule in India, 1858 to 1947 * British Hong Kong, British colonial rule in Hong Kong, 1841 to 1997 (excluding World War II) * Colony of Ceylon (other) * French Indochina, French colonial rule in Vietnam, Cambodia, and Laos * French Algeria, French colonial rule in Algeria, 1830 to 1962 * Australia: ** History of Australia (1788–1850) ** History of Australia (1851–1900) See also * Early modern period, the era from 1400–1800 CE ** Age of Discovery or Exploration, the period from – c. 1620 during which seafarers from European countries explored, colonized, and conquered regions across ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auguste Bravard
(Pierre Joseph) Auguste Bravard (18 June 1803 – 28 March 1861) was a French mining engineer turned palaeontologist. He hunted fossils in the Vaucluse, Allier and his native Puy de Dôme. Biography Bravard emigrated to Argentina in the winter of 1852–53 and was a long-term resident in Buenos Aires. He unearthed and studied mammalian fossils, some of which, like the skull of '' Mesotherium'', were sent back to the Muséum d'histoire naturelle, Paris. Pleistocene mammal fossils purchased from Bravard are also in the Museum of Natural History, South Kensington, London, transferred from the British Museum, which had purchased them from Bravard in 1854. Bravard, who became director of the natural history museum in Paraná, upheld geological theories contrary to those of Charles Darwin. From Buenos Aires, he explored in Bahía Blanca, resulting in his ''Mapa geológico y topográfico de los alrededores de Bahía Blanca, Buenos Aires'' (1857). He also explored the Paraná basin an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontologist
Paleontology, also spelled as palaeontology or palæontology, is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geologic time, and assess the interactions between prehistoric organisms and their natural environment. While paleontological observations are known from at least the 6th century BC, the foundation of paleontology as a science dates back to the work of Georges Cuvier in 1796. Cuvier demonstrated evidence for the concept of extinction and how life of the past was not necessarily the same as that of the present. The field developed rapidly over the course of the following decades, and the French word ''paléontologie'' was introduced for the study in 1822, which was derived from the Ancient Greek word for "ancient" and words describing relatedness and a field of study. Further advances in the field accompanied the work of Charles Darwin who popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mudflow
A mudflow, also known as mudslide or mud flow, is a form of mass wasting involving fast-moving flow of debris and dirt that has become liquified by the addition of water. Such flows can move at speeds ranging from 3 meters/minute to 5 meters/second. Mudflows contain a significant proportion of clay, which makes them more fluid than debris flows, allowing them to travel farther and across lower slope angles. Both types of flow are generally mixtures of particles with a wide range of sizes, which typically become sorted by size upon deposition. Mudflows are often called mudslips, a term applied indiscriminately by the mass media to a variety of mass wasting events. Mudflows often start as slides, becoming flows as water is entrained along the flow path; such events are often called mud failures. Other types of mudflows include lahars (involving fine-grained pyroclastic deposits on the flanks of volcanoes) and jökulhlaups (outbursts from under glaciers or icecaps). A statutory ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fumarole
A fumarole (or fumerole) is a vent in the surface of the Earth or another rocky planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcanic activity, but fumarole activity can also precede a volcanic eruption and has been used for eruption prediction. Most fumaroles die down within a few days or weeks of the end of an eruption, but a few are persistent, lasting for decades or longer. An area containing fumaroles is known as a fumarole field. The predominant vapor emitted by fumaroles is steam, formed by the circulation of groundwater through heated rock. This is typically accompanied by volcanic gases given off by magma cooling deep below the surface. These volcanic gases include sulfur compounds, such as various sulfur oxides and hydrogen sulfide, and sometimes hydrogen chloride, hydrogen fluoride, and other gases. A fumarole that emits significant sulfur compounds is some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
