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Miñiques
Miñiques is a massive volcanic complex containing a large number of craters, lava domes and flows, located in the Antofagasta Region of Chile. Located south of Volcán Chiliques and west of Cordón Puntas Negras, it is part of a frequently visited attraction conformed by the high plain lagoons Laguna Miscanti, Laguna Miñiques and the Cerro Miscanti volcano. Mountain Miñiques consists of four overlapping volcanoes formed by lava domes and stratovolcanoes. It has two summits, a lower northern summit which reaches elevation and a higher southern one which is high. The mountain features two crater lakes, one at and the other at elevation on the southeastern and western side of the northern summit, respectively. A set of well developed moraines exists on the southern flank and may reflect glaciers advancing either from the summit area or a plateau at elevation; overall however glaciation on Miñiques was of limited extent and the terrain of Miñiques today is domi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laguna Miñiques
Miñiques is the name of a lake and a volcano in Chile. It lies south of Laguna Miscanti and at the foot of the Cerro Miscanti volcano. The lake is fed from Laguna Miscanti by seepage and its waters are brackish. Lake Laguna Miñiques lies at an altitude of and is a lake with a surface area of . It is a fault-bound lake like Laguna Miscanti and Laguna Lejia farther north, and receives inflow from Laguna Miscanti by seepage; a lava flow separates Laguna Miñiques from Laguna Miscanti. Like Miscanti, the waters of Laguna Miñiques are brackish. Biology The cladocerans '' Alona pulchella'' and ''Daphnia'', the copepods '' Boeckella poopoensis'' and unidentified species of cyclopoida inhabit the lake. The lake is part of the Los Flamencos National Reserve and a tourism destination. Climate The regional climate is dry and influenced by the Atacama Desert in that regard, although the summits of the Western Cordillera have higher precipitation amounts, especially towards ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miscanti Lake
Miscanti Lake (Spanish: ''Laguna Miscanti'') is a brackish water lake located in the altiplano of the Antofagasta Region in northern Chile. Cerro Miñiques volcano and Cerro Miscanti tower over this lake. This large heart-shaped lake has a deep blue colour and developed in a basin formed by a fault. South of Miscanti lies Laguna Miñiques, another lake which is separated from Miscanti by a lava flow that was emplaced there during the Pleistocene. The lake is part of one of the seven sectors of Los Flamencos National Reserve. A number of birds and mammals live at the lake, which is a major tourist destination. Geography Laguna Miscanti lies in the Central Andes of Chile, east-southeast of the Salar de Atacama. Administratively, it is part of the Antofagasta Region. The closest town is Socaire, away from the lake. A road departing from the Paso Sico international road goes to Miscanti, which is accessible by an unpaved road and numerous footpaths. In 2002, there were 5,000 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laguna Miscanti
Miscanti Lake (Spanish: ''Laguna Miscanti'') is a brackish water lake located in the altiplano of the Antofagasta Region in northern Chile. Cerro Miñiques volcano and Cerro Miscanti tower over this lake. This large heart-shaped lake has a deep blue colour and developed in a basin formed by a fault. South of Miscanti lies Laguna Miñiques, another lake which is separated from Miscanti by a lava flow that was emplaced there during the Pleistocene. The lake is part of one of the seven sectors of Los Flamencos National Reserve. A number of birds and mammals live at the lake, which is a major tourist destination. Geography Laguna Miscanti lies in the Central Andes of Chile, east-southeast of the Salar de Atacama. Administratively, it is part of the Antofagasta Region. The closest town is Socaire, away from the lake. A road departing from the Paso Sico international road goes to Miscanti, which is accessible by an unpaved road and numerous footpaths. In 2002, there were 5,000 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Miscanti
Cerro Miscanti (also known as Ipira) is a mountain located in the Antofagasta Region of Chile, immediately south of Chiliques and north of Miñiques. It towers over Laguna Miscanti. Rock samples from Cerro Miscanti are of andesitic composition, but andesite-containing dacites have also been found. The edifice covers an area of and bears traces of a westward collapse, which exposed the internal sector of the volcano. A new volcano grew inside the collapse scar. Miscanti may be either extinct or may have erupted in the Pleistocene-Holocene. Renewed eruptions are likely to consist of lava flows, which could impact the northern shores of Laguna Miscanti. An Inka sanctuary has been reported from Cerro Miscanti. See also * Miñiques * Chiliques * Laguna Miscanti * Cordón Puntas Negras * Los Flamencos National Reserve * Caichinque Caichinque is a volcanic complex lying between Salar de Talar and ''Salar de Capur'', in the high Andean plateau of the Antofagasta Region, in Chil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cordón De Puntas Negras
Cordón de Puntas Negras is a volcanic chain located east of the Salar de Atacama in Chile's Antofagasta Region. Cordón de Puntas Negras is constructed along the major Calama–Olacapato–El Toro fault and is long. The long volcanic chain intersects with the long Cordón Chalviri volcanic chain. Both chains cover a surface area of and contain cones, vents, lava domes, lava flows and maars, including a lava dome and silicic flow with a surface area of . Puntas Negras specifically covers an area of and is the highest summit in the chain and features a wide crater and a long pyroclastic flow. Puntas Negras runs from the Chiliques volcano on the north to volcán Puntas Negras () almost to the SE. The Puntas Negras Volcano forms the common endpoint of two chains of volcanoes in a V-shaped configuration. The southern leg of the V is called "Cordón Chalviri" whose other extreme is the Cerro Tuyajto, SW of Puntas Negras and at the same distance SE of the Miñiques volcano. Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiliques
Chiliques is a stratovolcano located in the Antofagasta Region of Chile. Chiliques is capped off by a wide summit crater, which contains two crater lakes. One of these lakes is found in the northern part and the other east-southeastern part. The volcano is formed by rocks ranging from andesite to dacite; the andesites of the main stratocone building phase contain pyroxene. Together with Tumisa, Leija and Cordón de Puntas Negras it forms a northwest-trending volcano alignment. The first part of Chiliques to form was a block lava field, which still crops out northeast of the main volcano to a distance of . Lava flows with lengths of up to then constructed the stratovolcano proper and were later buried by shorter (up to ) lava flows that cover a surface of around the summit crater. The Cerro Overo maar northeast of Chiliques is occasionally considered the last phase of Chiliques's activity, and the two have erupted rocks with similar chemical composition but later rese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ignimbrite
Ignimbrite is a type of volcanic rock, consisting of hardened tuff. Ignimbrites form from the deposits of pyroclastic flows, which are a hot suspension of particles and gases flowing rapidly from a volcano, driven by being denser than the surrounding atmosphere. New Zealand geologist Patrick Marshall (1869-1950) coined the term ''ignimbrite'' from the Latin ''igni-'' [fire] and ''imbri-'' [rain]. Ignimbrites are made of a very poorly sorted mixture of volcanic ash (or tuff when Lithification, lithified) and pumice lapilli, commonly with scattered lithic fragments. The ash is composed of glass shards and crystal fragments. Ignimbrites may be loose and unconsolidated, or lithified (solidified) rock called lapilli-tuff. Near the volcanic source, ignimbrites often contain thick accumulations of lithic blocks, and distally, many show meter-thick accumulations of rounded cobbles of pumice. Ignimbrites may be white, grey, pink, beige, brown, or black depending on their composition and d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andesitic
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the feldsp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacitic
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene ( augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form transitions to the rhyolites. The relative proportions of feldspars and quartz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
