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Itaboraian
The Itaboraian () age is a period within the Early Eocene geologic time (53.0–50.0 Ma) epoch of the Paleogene, used more specifically with South American land mammal ages (SALMA). It follows the Riochican and precedes the Casamayoran age. Etymology This age is named after the Itaboraà Formation in the Itaboraà Basin in ItaboraÃ, a Greater Rio municipality in the state of Rio de Janeiro in Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ... not very far away from Niterói. Formations Fossils Correlations References Bibliography ;Itaboraà Formation * * * * * * ;Bogotá Formation * * * ;Cerrejón Formation * * * * * * * * * * * * * ;Chota Formation * * ;Las Flores Formation * * * ;Koluel Kaike Formation * ;Maà ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itaboraà Formation
The Itaboraà Formation () is a highly list of fossiliferous stratigraphic units in Brazil, fossiliferous geologic Formation (geology), formation and LagerstätteKellner & Campos, 1999, p.399 of the Itaboraà Basin in Rio de Janeiro (state), Rio de Janeiro, southeastern Brazil. The formation reaching a thickness of is the defining unit for the Itaboraian South American land mammal age (SALMA), dating to the Eocene, Early Eocene, approximately 53 to 50 Ma. The formation is restricted to the Itaboraà Basin, a minibasin of around the city of ItaboraÃ, northeast of Rio de Janeiro, and comprises limestones, marls and lignites, deposited in an alluvial to lacustrine depositional environment, environment, dominated by heavy rainfall. The formation overlies Precambrian basement (geology), basement and is overlain by Early Eocene basalts and Late Eocene to Early Oligocene conglomerate (geology), conglomerates. The up to thick formation has provided many fossil mammals of various grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerrejón Formation
The Cerrejón Formation is a geologic formation in Colombia dating back to the Middle-Late Paleocene. It is found in the El Cerrejón sub-basin of the Cesar-RancherÃa Basin of La Guajira Department, La Guajira and Cesar Department, Cesar. The formation consists of bituminous coal fields that are an important economic resource. Coal from the Cerrejón Formation is mined extensively from the Cerrejón open-pit mining, open-pit coal mine, one of the largest in the world. The formation also bears fossils that are the earliest record of Neotropical rainforests.Wing et al., 2009 Definition The formation was first named Septarias Formation and in 1958 renamed to Cerrejón Formation by Thomas van der Hammen, probably based on an earlier report by Notestein.RodrÃguez & Londoño, 2002, p.163 Geology The Cerrejón Formation, with an assigned total thickness of , is subdivided into lower, middle, and upper groups based on the thickness and distribution of coal beds. On average the coa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bogotá Formation
The Bogotá Formation (, E1-2b, Tpb, Pgb) is a geological formation of the Eastern Hills and Bogotá savanna on the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The predominantly shale and siltstone formation, with sandstone beds intercalated, dates to the Paleogene period; Upper Paleocene to Lower Eocene epochs, with an age range of 61.66 to 52.5 Ma, spanning the Paleocene–Eocene Thermal Maximum. The thickness of the Bogotá Formation ranges from near Tunja to near Bogotá. Fossils of the ungulate '' Etayoa bacatensis'' have been found in the Bogotá Formation, as well as numerous reptiles, unnamed as of 2017. Etymology The formation was first described by Hettner in 1892,Acosta & Ulloa, 2002, p.59 then by Hubach in 1931, 1945 and 1957, and named in 1963 by Julivert after the Colombian capital Bogotá and its savanna.Montoya & Reyes, 2005, p.57 Description Lithologies The Bogotá Formation consists mainly of grayish-red, locally purplish, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South American Land Mammal Age
The South American land mammal ages (SALMA) establish a geologic timescale for prehistoric South American fauna beginning 64.5 Ma during the Paleocene and continuing through to the Late Pleistocene (0.011 Ma). These periods are referred to as ages, stages, or intervals and were established using geographic place names where fossil materials where obtained.Flynn & Swisher, 1995 The basic unit of measurement is the first/last boundary statement. This shows that the first appearance event of one taxon is known to predate the last appearance event of another. If two taxa are found in the same fossil quarry or at the same stratigraphic horizon, then their age-range zones overlap. Background South America was an island continent for much of the Cenozoic, or the "Age of Mammals". As a result, its mammals evolved in their own unique directions, as Australia and Madagascar still have today. Paleogeographic timeline A simplified paleogeographic timeline of South America: * 66 Ma – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itaboraà Basin
Itaboraà (, ) is a city in the state of Rio de Janeiro (state), Rio de Janeiro in Brazil, that belongs to the Rio de Janeiro metropolitan area. It was founded in 1672. In 2020, it had a population of 242,543. Around the year 1000, Tupi-speaking peoples from the valleys of the Madeira River, Madeira and Xingu River, Xingu rivers, on the right bank of the Amazon River, invaded most of the current Brazilian coast, expelling its previous inhabitants, speakers of languages belonging to the Macro-Jê languages, Macro-Jê linguistic trunk, to the interior of the continent. In the 16th century, when the Portuguese arrived in the Guanabara Bay region, it was occupied by one of these Tupi people, Tupi peoples: the Tupinambá people, Tupinambás, also called Tamoios. Geography Location Culturally, its closest municipalities are São Gonçalo, Rio de Janeiro, São Gonçalo and Niterói, connected to them by the Niterói-Manilha highway. It is officially planned since the start of the last ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salta Basin
Salta Basin or Salta Rift Basin is a sedimentary basin located in the Argentine Northwest. The basin started to accumulate sediments in the Early Cretaceous ( Neocomian) and at present it has sedimentary deposits reaching thicknesses of . The basin contains seven sub-basins: Tres Cruces, Lomas de Olmedo, Metán, AlemanÃa, Salfity, El Rey, Sey and Brealito. The basin environment has variously been described as a " foreland rift" and an "intra-continental rift". The basin developed under conditions of extensional tectonics and rift-associated volcanism. Description The basin basement is composed of rocks belonging to the Puncoviscana Formation.Grier et al., 1991 The volcanism that began in the Jurassic, Late Jurassic was initially of subalkaline character (low sodium and potassium content), but turned increasingly alkaline in the Early Cretaceous.Marquillas et al., 2005 The rifts of Salta Basin developed in a time of generalized extensional tectonics Extensional tectonics is con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golfo San Jorge Basin
The Golfo San Jorge Basin () is a hydrocarbon-rich sedimentary basin located in eastern Patagonia, Argentina. The basin covers the entire San Jorge Gulf and an inland area west of it, having one half located in Santa Cruz Province and the other in Chubut Province. The northern boundary of the basin is the North Patagonian Massif while the Deseado Massif forms the southern boundary of the basin. The basin has largely developed under condition of extensional tectonics, including rifting. The basin is of paleontological significance as it hosts six out of 22 defining formations for the SALMA classification, the geochronology for the Cenozoic used in South America. At the center of the basin accumulated sediments reach more than of thickness. Oil was first discovered in 1907 and over the years it has become the second most productive hydrocarbon basin in Argentina after Neuquén Basin. Stratigraphy The stratigraphy of the Golfo San Jorge Basin covers the following units:Raigem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ItaboraÃ
Itaboraà (, ) is a city in the state of Rio de Janeiro (state), Rio de Janeiro in Brazil, that belongs to the Rio de Janeiro metropolitan area. It was founded in 1672. In 2020, it had a population of 242,543. Around the year 1000, Tupi-speaking peoples from the valleys of the Madeira River, Madeira and Xingu River, Xingu rivers, on the right bank of the Amazon River, invaded most of the current Brazilian coast, expelling its previous inhabitants, speakers of languages belonging to the Macro-Jê languages, Macro-Jê linguistic trunk, to the interior of the continent. In the 16th century, when the Portuguese arrived in the Guanabara Bay region, it was occupied by one of these Tupi people, Tupi peoples: the Tupinambá people, Tupinambás, also called Tamoios. Geography Location Culturally, its closest municipalities are São Gonçalo, Rio de Janeiro, São Gonçalo and Niterói, connected to them by the Niterói-Manilha highway. It is officially planned since the start of the last ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casamayoran
The Casamayoran () age is a period of geologic time (50.0–48.0 Ma) within the Early Eocene epoch of the Paleogene, used more specifically within the South American land mammal age (SALMA) classification. It follows the Itaboraian and precedes the Mustersan age. Several astrapotherian mammals are known from this period, such as '' Antarctodon'' and '' Albertogaudrya'' from Antarctica and Argentina, respectively. '' Albertogaudrya'' and '' Scaglia'' were the size of a sheep or a small tapir, hence among the larger mammals in South America at this time.Rose, 2006, p.236 Etymology This age is named after the Casamayor Formation of the Golfo San Jorge Basin The Golfo San Jorge Basin () is a hydrocarbon-rich sedimentary basin located in eastern Patagonia, Argentina. The basin covers the entire San Jorge Gulf and an inland area west of it, having one half located in Santa Cruz Province and the other i .... Formations Fossils References Bibliography ;General * ;C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riochican
The Riochican () age is a period of geologic time (57.0–54.0 Ma) within the Paleocene and Eocene epochs of the Paleogene, used more specifically within the South American land mammal ages (SALMA). It follows the Peligran and precedes the Itaboraian age. Etymology This age is named after the RÃo Chico Group of the Golfo San Jorge Basin The Golfo San Jorge Basin () is a hydrocarbon-rich sedimentary basin located in eastern Patagonia, Argentina. The basin covers the entire San Jorge Gulf and an inland area west of it, having one half located in Santa Cruz Province and the other i .... Formations Fossils References Bibliography ;Bogotá Formation * * * ;Bororó Formation * ;Chota Formation * * ;Las Flores Formation * ;Koluel Kaike Formation * ;MaÃz Gordo Formation * ;Mealla Formation * ;Mogollón Formation * * ;Muñani Formation * ;Peñas Coloradas Formation * * ;RÃo Loro Formation * ;Salamanca Formation * * * * * {{SALMA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tumbes Basin
Tumbes, Tumbez, or Túmbez may refer to: * Tumbes, Peru * Tumbes River or Túmbez River of Ecuador and Peru in South America * Tumbes Region Tumbes () is a coastal department and region in northwestern Peru bordering Ecuador. Due to the region's location near the Equator it has a warm climate, with beaches that are considered among the finest in Peru. Despite its small area, the re ... in coastal Peru * Tumbes Province, a political subdivision of Peru * Tumbes Reserved Zone * Tumbez, Virginia * Caleta Tumbes, a town and fisherman cove in Chile See also * Tumpis Indians, a people of Ecuador and Peru * Gulf of Guayaquil-Tumbes mangroves ecoregion of Peru and Ecuador * Manglares de Tumbes National Sanctuary of Peru {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
