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Chimantá Massif
The Chimantá Massif is a highly fragmented complex of tepuis in Bolívar state, Venezuela. The massif comprises around 11 tepuis and has a total summit area of and an estimated slope area of .Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. It is divided in two by the Río Tírica, with the northern section being both larger and higher. The massif is notable for its high species richness and for its varied habitat types. It reaches an elevation of Nogué, S., V. Rull, E. Montoya, O. Huber & T. Vegas-Vilarrúbia (October 2009). Paleoecology of the Guayana Highlands (northern South America): Holocene pollen record from the Eruoda-tepui, in the Chimantá massif. ''Palaeogeography, Palaeoclimatology, Palaeoecology'' 281(1–2): 165–173. on its highest peak, Murey-tepui (also known as Eruoda-tepui). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cueva Charles Brewer
Cuevas or Cueva (Spanish for "''cave(s)''") may refer to: Places * Cueva de Ágreda, a municipality located in the province of Soria, Castile and León, Spain * Cuevas Bajas, a town and municipality in the province of Málaga, part of the autonomous community of Andalusia in southern Spain * Cuevas de Almudén, a town in the province of Teruel, Aragón, Spain * Cuevas del Almanzora, a municipality of Almería province, in the autonomous community of Andalusia, Spain * Cuevas del Becerro, a town and municipality in the province of Málaga, part of the autonomous community of Andalusia in southern Spain * Cuevas del Valle, a municipality in the province of Ávila, Castile and León, Spain * Cuevas de Provanco, a municipality in the province of Segovia, Castile and León, Spain * Cuevas de San Clemente, a municipality in the province of Burgos, Castile and León, Spain * Cuevas de San Marcos, a town and municipality in the province of Málaga * Cuevas de Vera, a town in south-east ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tepuis Of Venezuela
A tepui , or tepuy (), is a table-top mountain or mesa found in South America, especially in Venezuela and western Guyana. The word tepui means "house of the gods" in the native tongue of the Pemon, the indigenous people who inhabit the Gran Sabana. Tepuis tend to be found as isolated entities rather than in connected ranges, which makes them the host of a unique array of endemic plant and animal species. Some of the most outstanding tepuis are Auyantepui, Autana, Neblina, and Mount Roraima. They are typically composed of sheer blocks of Precambrian quartz arenite sandstone that rise abruptly from the jungle, giving rise to spectacular natural scenery. Auyantepui is the source of Angel Falls, the world's tallest waterfall. Morphology These table-top mountains are the remains of a large sandstone plateau that once covered the granite basement complex between the north border of the Amazon Basin and the Orinoco, between the Atlantic coast and the Rio Negro. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliamphora Sp
The genus ''Heliamphora'' ( or ; Greek: ''helos'' "marsh" and ''amphoreus'' "amphora") contains 23 species of pitcher plants endemic to South America.McPherson, S., A. Wistuba, A. Fleischmann & J. Nerz 2011. ''Sarraceniaceae of South America''. Redfern Natural History Productions, Poole. The species are collectively known as sun pitchers, based on the mistaken notion that the ''heli'' of ''Heliamphora'' is from the Greek ''helios'', meaning "sun". In fact, the name derives from ''helos'', meaning marsh, so a more accurate translation of their scientific name would be marsh pitcher plants. Species in the genus ''Heliamphora'' are carnivorous plants that consist of a modified leaf form that is fused into a tubular shape. They have evolved mechanisms to attract, trap, and kill insects; and control the amount of water in the pitcher. At least one species ('' H. tatei'') produces its own proteolytic enzymes that allows it to digest its prey without the help of symbiotic bacteria. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distribution Of Heliamphora
The natural range of the carnivorous plant genus ''Heliamphora'' is restricted to the southern Venezuelan states of Amazonas and Bolívar, and to adjacent portions of northern Brazil and western Guyana, an area corresponding to the western part of the Guayana Shield. These plants are largely confined to the summits and foothills of the sandstone table-top mountains of the region, known as ''tepuis''. The genus has a highly disjunct distribution spread across two major groups of tepuis: the western range in Amazonas and the eastern range in Bolívar.Rice, B. (2012)''Heliamphora'': the various ranges and tepuis The Carnivorous Plant FAQ. The western range can be further subdivided into two complexes of neighbouring tepuis. The more southerly of these consists of Cerro de la Neblina, Cerro Aracamuni, and Cerro Avispa, and supports four ''Heliamphora'' species. The more northerly group of the western range, home to only two species, includes the massive Cerro Duida and neighbour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upuigma-tepui
Upuigma-tepui, also known as El Castillo, is a tepui in Bolívar state, Venezuela.Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. A relatively isolated peak, both it and nearby Angasima-tepui lie just south of the vast Chimantá Massif, from which they are separated by the Río Aparurén valley. Upuigma-tepui is situated entirely within the bounds of Canaima National Park. The imposing peak of Upuigma-tepui has an elevation of around . Its highly uneven summit is dotted with numerous rock towers and deep crevasses which make it practically impossible to traverse. Summit vegetation is predominantly in the form of tepui scrub and dense stands of herbaceous plants. The mountain has a summit area of and an estimated slope area of . The first documented people to climb Upuigma-tepui were John Arran, Ivan Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angasima-tepui
Angasima-tepui, also known as Adanta, Adankasima or Adankachimö, . ClimTepuyes. is a tepui in Bolívar state, Venezuela.Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. A relatively isolated peak, both it and nearby |
Speleogenesis
Speleogenesis is the origin and development of caves, the primary process that determines essential features of the hydrogeology of karst and guides its evolution. It often deals with the development of caves through limestone, caused by the presence of water with carbon dioxide dissolved within it, producing carbonic acid which permits the dissociation of the calcium carbonate in the limestone. Limestone The majority of limestone caves are created by calcium carbonate dissolution by the solvent action of meteoric waters circulating through the rock. In the presence of carbon dioxide saturated water, calcium carbonate reacts to form the soluble calcium bicarbonate. CaCO3 + CO2 + H2O → Ca(HCO3)2 As meteoric waters precipitate they dissolve atmospheric carbon dioxide to form a dilute carbonic acid solution, which builds up in permeable fissures, bedding planes, joints, and faults within limestone rocks. The exposed limestone then reacts to become calcium bicarbonate which d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Brewer-Carías
Charles Brewer-Carías (born 10 September 1938 in Caracas, Venezuela) is a Venezuelan explorer and naturalist. Known as the "Humboldt of the twentieth century", Brewer-Carías has led more than 200 expeditions to remote parts of the Venezuelan Guayana, particularly the tepuis ( table mountains) of the region. His discoveries include the sink holes of Cerro Sarisariñama and the world's largest known quartzite cave, Cueva Charles Brewer.Brewer Carías, Charles (1938-) JSTOR Plant Science. University of Plymouth.Carroll, R. (6 April 2010) The British gentleman who became Venezuela's In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzite
Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of hematite. Other colors, such as yellow, green, blue and orange, are due to other minerals. The term ''quartzite'' is also sometimes used for very hard but unmetamorphosed sandstones that are composed of quartz grains thoroughly cemented with additional quartz. Such sedimentary rock has come to be described as orthoquartzite to distinguish it from metamorphic quartzite, which is sometimes called metaquartzite to emphasize its metamorphic origins. Quartzite is very resistant to chemical weathering and often forms ridges and resistant hilltops. The nearly pure silica co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in the Caribbean Sea. It has a territorial extension of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas. The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. The Venezuelan government maintains a claim against Guyana to Guayana Esequiba. Venezuela is a federal presidential republic consisting of 23 states, the Capital District and federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
