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Gran Sabana
La Gran Sabana (, en, The Great Savanna) is a region in southeastern Venezuela, part of the Guianan savanna ecoregion. The savanna spreads into the regions of the Guiana Highlands and south-east into Bolívar State, extending further to the borders with Brazil and Guyana. The Gran Sabana has an area of and is part of the second largest National Park in Venezuela, the Canaima National Park. Only Parima Tapirapecó National Park is larger than Canaima. The average temperature is around 20 °C (68 °F), but at night can drop to 13 °C (55 °F) and in some of the more elevated sites, depending on weather, may drop a bit more. The location offers one of the most unusual landscapes in the world, with rivers, waterfalls and gorges, deep and vast valleys, impenetrable jungles and savannahs that host large numbers and varieties of plant species, a diverse fauna and the isolated table-top mesas locally known as ''tepuis''. History During the time of the Colonia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savanna
A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. According to '' Britannica'', there exists four savanna forms; ''savanna woodland'' where trees and shrubs form a light canopy, ''tree savanna'' with scattered trees and shrubs, ''shrub savanna'' with distributed shrubs, and ''grass savanna'' where trees and shrubs are mostly nonexistent.Smith, Jeremy M.B.. "savanna". Encyclopedia Britannica, 5 Sep. 2016, https://www.britannica.com/science/savanna/Environment. Accessed 17 September 2022. Savannas maintain an open canopy despite a high tree density. It is often believed that savannas feature widely spaced, scattered trees. However, in many savannas, tree densities are higher and trees are more regularly spaced than in for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caroní River
The Caroní River is the second most important river of Venezuela, the second in flow, and one of the longest, from the Kukenan tepui through to its confluence with the Orinoco River. The name "Caroní" is applied starting from the confluence of the Kukenan with the Yuruaní River at from the source of the Kukenan and from its discharge in the Orinoco. The confluence takes place in Bolivar State. Hydraulic regime The Caroní is one of the rivers with the highest discharge rates in the world, with respect to the area of its basin. The average discharge is , with variations caused by the wet/dry seasons. The average maximum discharge is , and the average minimum is . Among the historic extremes are . The Caroní supplies 15.5 percent of the discharge of the Orinoco river. One of the characteristics of the Caroní's water is the dark color, caused by the high amount of humic acids due to the incomplete decomposition of the phenol content of the vegetation. The Caroní t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guyana Shield
The Guiana Shield (french: Plateau des Guyanes, Bouclier guyanais; nl, Hoogland van Guyana, Guianaschild; pt, Planalto das Guianas, Escudo das Guianas; es, Escudo guayanés) is one of the three cratons of the South American Plate. It is a 1.7 billion-year-old Precambrian geological formation in northeast South America that forms a portion of the northern coast. The higher elevations on the shield are called the Guiana Highlands, which is where the table-like mountains called tepuis are found. The Guiana Highlands are also the source of some of the world's most well-known waterfalls such as Angel Falls, Kaieteur Falls and Cuquenan Falls. The Guiana Shield underlies Guyana (previously British Guiana), Suriname (previously Dutch Guiana) and French Guiana (or Guyane), much of southern Venezuela, as well as parts of Colombia and Brazil. The rocks of the Guiana Shield consist of metasediments and metavolcanics ( greenstones) overlain by sub-horizontal layers of sandstones, quartzi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caracas
Caracas (, ), officially Santiago de León de Caracas, abbreviated as CCS, is the capital and largest city of Venezuela, and the center of the Metropolitan Region of Caracas (or Greater Caracas). Caracas is located along the Guaire River in the northern part of the country, within the Caracas Valley of the Venezuelan coastal mountain range (Cordillera de la Costa). The valley is close to the Caribbean Sea, separated from the coast by a steep 2,200-meter-high (7,200 ft) mountain range, Cerro El Ávila; to the south there are more hills and mountains. The Metropolitan Region of Caracas has an estimated population of almost 5 million inhabitants. The center of the city is still ''Catedral'', located near Bolívar Square, though some consider the center to be Plaza Venezuela, located in the Los Caobos area. Businesses in the city include service companies, banks, and malls. Caracas has a largely service-based economy, apart from some industrial activity in its metropolitan ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ciudad Guayana
Ciudad Guayana () (in English Guayana City) is a city in Bolívar State (Venezuela), Bolívar State, Venezuela. It stretches 40 kilometers along the south bank of the Orinoco, Orinoco river, at the point where it is joined by its main tributary, the Caroni River (Venezuela), Caroní river. The Caroni crosses the city south-north and divides it on its two main halves: the old town of San Félix in the east, and the new town of Puerto Ordaz () in the west. The city was officially founded in 1961 by the unification of this two former settlements, but the history of San Félix goes back to its foundation in 1724. Within the city limits are located the site of Cachamay Falls and Llovizna Falls.Dydyński, Krzysztof, & Beech, Charlotte (2004). ''Venezuela'', p. 293. Lonely Planet. There are three bridges across the Caroni and the second crossing over the Orinoco, the Orinoquia Bridge, was inaugurated in the city in 2006. With approximately one million people, it is Venezuela's fastest- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond
Diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the Chemical stability, chemically stable form of carbon at Standard conditions for temperature and pressure, room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest Scratch hardness, hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of lattice defect, defects or impurities (about one per million of lattice atoms) color diamond blue (bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Elena De Uairén
Santa Elena de Uairén () is a small Venezuelan city (29,795 inhabitants in 2006) in the state of Bolívar near the border with Brazil and Guyana. It was founded by Lucas Fernández Peña in 1923. The city's name originates from his first daughter, Elena, and Uairén, the river that crosses the city. Located in the middle of La Gran Sabana, Santa Elena is home to many travel agencies offering tours in Canaima National Park, flights over Angel Falls, and hiking tours to the famous Monte Roraima. The town is notable for its influential presence of indigenous peoples; there is even a community called Manakrü (pronounced mah-nah-CREE) populated entirely by indigenous people. The schools in this neighborhood use both Spanish and Pemon, an indigenous language. Due to its proximity to the Brazilian state of Roraima, Santa Elena sees a busy exchange between the two countries of Brazilian consumer products from Brazil and Venezuelan oil and petrol. Other Brazilian cities that trade wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibia
Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramatic decl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reptil
Reptil is a superhero figure and character appearing in American comic books published by Marvel Comics. He is best known as a supporting member on ''The Super Hero Squad Show'' and a member of the Avengers Academy in the comics. Publication history A marvel comic '' Avengers: The Initiative'' Features Reptil for the first time in the given publication''.'' Anonymously referenced by a previous Wikipedia expert as Reptil #1; created by Christos Gage and Steve Uy.Reptil appeared as a regular character in all 39 issues of ''Avengers Academy'' from 2010 to 2013. The character Reptil also appeared in ''Avengers Arena'', a series by Dennis Hopeless and Kev Walker for ''Marvel NOW!''. Reptil's revival of uses in comics revisited his role as a supporting character in the 2021 one-shot ''King in Black: Spider-Man''. Within the same year, Reptil was featured in a 4-issue limited series ''Reptil'', written by Terry Blas and penciled by Enid Balám. Fictional character biography Humberto Lope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna
Fauna is all of the animal life present in a particular region or time. The corresponding term for plants is ''flora'', and for fungi, it is '' funga''. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoologists and paleontologists use ''fauna'' to refer to a typical collection of animals found in a specific time or place, e.g. the "Sonoran Desert fauna" or the "Burgess Shale fauna". Paleontologists sometimes refer to a sequence of faunal stages, which is a series of rocks all containing similar fossils. The study of animals of a particular region is called faunistics. Etymology ''Fauna'' comes from the name Fauna, a Roman goddess of earth and fertility, the Roman god Faunus, and the related forest spirits called Fauns. All three words are cognates of the name of the Greek god Pan, and ''panis'' is the Greek equivalent of fauna. ''Fauna'' is also the word for a book that catalogues the animals in such a manner. The term was first used b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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