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Cerro Autana
Cerro Autana (Autana Mountain) is a geological formation located at the western portion of the Guiana Shield in the Estado Amazonas, Venezuela near the Colombian border. It is characterized by a narrow base, a flat top, and almost vertical walls. Its top is at approximately . It belongs to the formations known as tepuis which are characteristic flat-top mountains of the Guiana Shield. Cerro Autana (Wahari-Kuawai) plays the role of the "tree of life" in the oral history and lore of the Piaroa people, Piaroa Indians who inhabit the region. The first Europeans to visit the region around Cerro Autana were Alexander von Humboldt and Aimé Bonpland in 1800. During 1852-1854 Richard Spruce and Alfred Russel Wallace made numerous observations and botanical collections. Cerro Autana is the landmark of the region of Autana which encompasses the Cerro Autana itself, a smaller adjacent mountain often referred to as the “Autanita”, the Cuao, Autana, and Umaj-ajé rivers and Lake Leopoldo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It comprises an area 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. Venezuela is a presidential republic consisting of States of Venezuela, 23 states, the Venezuelan Capital District, Capital District and Federal Dependencies of Venezuela, 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 the north and in the capital. The territory o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Ridge Autana
North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is related to the Old High German ''nord'', both descending from the Proto-Indo-European unit *''ner-'', meaning "left; below" as north is to left when facing the rising sun. Similarly, the other cardinal directions are also related to the sun's position. The Latin word ''borealis'' comes from the Greek ''boreas'' "north wind, north" which, according to Ovid, was personified as the wind-god Boreas, the father of Calais and Zetes. ''Septentrionalis'' is from ''septentriones'', "the seven plow oxen", a name of ''Ursa Major''. The Greek ἀρκτικός (''arktikós'') is named for the same constellation, and is the source of the English word ''Arctic''. Other languages have other derivations. For example, in Lezgian, ''kefer'' can mean b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Payara
The payara, ''(Hydrolycus scomberoides)'', is a species of dogtooth tetra. This predatory fish is found in the Amazon Basin in tropical South America. It was the first of four species to be described in the genus '' Hydrolycus''. Description The most noticeable feature of ''H. scomberoides'' is the two long fangs protruding from its lower jaw. These are used to impale their prey, mostly smaller fish. It typically reaches a standard length of about , but can reach up to . There are reports of far larger individuals, up to in total length and in weight, based on records by IGFA, but this likely involves confusion with the related '' H. armatus''. ''H. scomberoides'' is overall silvery with a dark spot behind the opercle and another at the lower base of the pectoral fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuniculus Paca
The lowland paca (''Cuniculus paca''), also known as the spotted paca, is a large rodent found in tropical and sub-tropical America, from east-central Mexico to northern Argentina, and has been introduced to Cuba and Algeria. The animal is called ''paca'' in most of its range, but ''tepezcuintle'' (original Aztec language name) in most of Mexico and Central America, tepesquintle in Guatemala, ''guardatinaja'' in Nicaragua, ''pisquinte'' in northern Costa Rica, ' in the Yucatán peninsula, ''conejo pintado'' in Panama, ''guanta'' in Ecuador, ''majás'' or ''picuro'' in Peru, ''jochi pintado'' in Bolivia, and ''boruga'', ''tinajo'',Fauna y flora de la cuenca media del Río Lebrija en Rionegro, Santander - [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stefania Breweri
''Stefania breweri'', also known as Brewer's carrying frog (in Spanish ''rana stefania de Brewer''), is a species of frog in the family Hemiphractidae. It is endemic to Cerro Autana, Venezuela, and only known from a single specimen (holotype). It was named for Venezuelan explorer Charles Brewer-Carías. Description The holotype, of unknown sex, measures in snout–vent length (the specimen is somewhat dehydrated was not dissected to avoid damage). The snout is subacuminate in dorsal view and truncate in profile. The canthus rostralis is distinct and straight. The Tympanum (anatomy), tympanum is distinct with an ossified annulus. The supra-tympanic fold is narrow but distinct. Skin is smooth. The fingers have small discs and no webbing. The toes have small discs and basal webbing. The preserved specimen is dorsally pale orange. A pale white inter-orbital bar is present. The flanks are whitish with a few dark brown bars. The throat, chest, and belly are uniformly pinkish. Habita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptodactylus Lithonaetes
''Leptodactylus lithonaetes'' is a species of frog in the family Leptodactylidae. It is found in Colombia, Venezuela, and possibly Brazil. Its natural habitats are subtropical or tropical moist lowland forests, moist savanna, rivers, and rocky areas. It is not considered threatened by the IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status .... References lithonaetes Amphibians of Colombia Amphibians of Venezuela Amphibians described in 1995 Taxonomy articles created by Polbot {{Leptodactylidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bongo Autana
Bongo may refer to: Entertainment * ''Bongo'' (Australian TV series), on air from August to November 1960 * Bongo Comics, a comic book publishing company * Bongo (''Dragon Ball'') or Krillin, a character in ''Dragon Ball'' media * ''Bongo'' (Indian TV series), an Indian television drama for children 2004 * Bongo, a character in the Matt Groening comic strip '' Life in Hell'' * Bongo, a dog who played drums in the ITV children's series '' Animal Kwackers'' * Bongo Submarine, a fictional vehicle in the film ''Star Wars: Episode I – The Phantom Menace'' * Bongo, the cartoon ape bouncer from the 1988 film, ''Who Framed Roger Rabbit'' * " Little Bear Bongo", a 1930 short story for children by Sinclair Lewis ** ''Bongo'', a segment of the 1947 Disney film '' Fun and Fancy Free'', adapted from the Lewis story Music * Bongo drum, a percussion instrument made up of two small drums attached to each other * The Bongos, an America pop music band * Music Man Bongo, a model of bass guit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abseiling
Abseiling ( ; ), also known as rappelling ( ; ), is the controlled descent of a steep slope, such as a rock face, by moving down a rope. When abseiling, the person descending controls their own movement down a static or fixed rope, in contrast to Belaying, lowering off, in which the rope attached to the person descending is paid out by their belayer. Description The technique is used by Climbing, climbers, mountaineers, Caving, cavers, Canyoning, canyoners, search and rescue and rope access technicians to descend cliffs or slopes when they are too steep or dangerous to descend without protection. Many climbers use this technique to protect established Anchor (climbing), anchors from damage. Rope access technicians also use this as a method to access difficult-to-reach areas from above for various industrial applications like maintenance, construction, inspection and welding. To descend safely, abseilers use a variety of techniques to increase the friction on the rope to t ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcium Carbonate
Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in Rock (geology), rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described as calcareous. Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale. It has medical use as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause hypercalcemia and digestive issues. Chemistry Calcium carbonate shares the typical properties of other carbonates. Notably, it: *reacts with acids, releasing carbonic acid which quickly disintegrates into carbon dioxide and water: : *releases carbon dioxide upon heating, called a thermal decomposition reaction, or calcination (to above 840 °C in the case of ), t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
