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Huayquerian
The Huayquerian () age is a period of geologic time (9.0–6.8 Ma) within the Late Miocene epoch of the Neogene, used more specifically within the SALMA classification. It follows the Chasicoan and precedes the Montehermosan age. Etymology The age is named after the Huayquerías Formation in the western Cuyo Basin of northwestern Argentina that was later dated to the Montehermosan The Montehermosan age is a period of geologic time (6.8–4.0 Mya (unit), Ma) within the Miocene and Pliocene epochs of the Neogene used more specifically with South American Land Mammal Ages. It follows the Huayquerian and precedes the Chapadmalal .... The most complete Huayquerian fauna is found in the Cerro Azul Formation, in Buenos Aires Province also referred to as Epecuén Formation. Formations Fossil content Correlations Notes and references Notes References Bibliography ;Huayquerías Formation * * ;Andalhuala Formation * ;Camacho Formation * * * ;Cerro A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huayquerías Formation
The Huayquerías Formation () is a Miocene, Late Miocene list of fossiliferous stratigraphic units in Argentina, fossiliferous formation (geology), geological formation of the Frontal Cordillera and Cuyo Basin of Argentina. The formation outcrop, crops out in the central Mendoza Province. The formation, with a maximum thickness of , comprises reddish mudstones with thin beds of tuffs and sandstones, deposited in a fluvial, depositional environment, environment. The tuff in the formation is dated to 5.84 ± 0.41 Ma, placing it in the Huayquerian South American land mammal age, SALMA, the age named after the formation by Kraglievitch in 1934. The formation has provided fossils of the Procyonidae, procyonid ''Cyonasua, Cyonasua pascuali'' and the Litopterna, litoptern ''Huayqueriana, Huayqueriana cristata'', named after the formation. Description The Huayqueriás Formation, present in the Frontal Cordillera and the neighboring Cuyo Basin, was described in 1934 by Kraglievitch as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Azul Formation
The Cerro Azul Formation (), also described as Epecuén Formation, is a formation (geology), geological formation of Late Miocene (Tortonian, or Huayquerian in the South American land mammal age, SALMA classification) age in the Colorado Basin, Argentina, Colorado Basin of the Buenos Aires Province, Buenos Aires and La Pampa Provinces in northeastern Argentina.Cerro Azul Formation in the Paleobiology DatabaseEpecuén Formation in the Paleobiology Database The fluvial and aeolian processes, aeolian siltstones, sandstones and tuffs of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epecuén Formation
The Cerro Azul Formation (), also described as Epecuén Formation, is a geological formation of Late Miocene (Tortonian, or Huayquerian in the SALMA classification) age in the Colorado Basin of the Buenos Aires and La Pampa Provinces in northeastern Argentina.Cerro Azul Formation in the Epecuén Formation in the |
Ituzaingó Formation
The Ituzaingó Formation (), in older literature also described as Entre Ríos or Entrerriana Formation, is an extensive formation (geology), geological formation of Late Miocene (Tortonian, or Huayquerian in the South American land mammal age, SALMA classification) age in the Paraná Basin of the Corrientes Province, Corrientes, Santa Fe Province, Santa Fe and Entre Ríos Provinces in Mesopotamia, Argentina, Mesopotamia, northeastern Argentina.Ituzaingó Formation at Fossilworks.org The formation comprises mudstones, cross-bedded sandstones and conglomerate (geology), conglomerates deposited in a fluvial, fluvio-river delta, deltaic depositional environment, environment and is renowned for the preservation of a rich fossil assemblage, including many mammals, ... [...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] |
Camacho Formation
The Camacho Formation is a Huayquerian geologic formation in Uruguay. It also comprises the formerly named Kiyu Formation. Fossil content The following fossils have been reported from the formation: ;Mammals * ''Arazamys'' * '' Charruatoxodon'' * ''Cyonasua'' * Gomphotheridae indet. * '' Isostylomys laurillardi'' * '' Lestobradys sprechmanni''''Lestobradys'' at .org * '' Neobrachytherium ullumense'' * '' Neoglyptatelus uruguayensis'' * '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuyo Basin
Cuyo Basin () is a sedimentary basin in Mendoza Province, western Argentina. The Cuyo Basin has a NNW-SSE elongated shape and is limited to the west by the Sierra Pintada System and to the east by the Pampean pericraton. To the north the basin reaches the area around the city of Mendoza. Description The Cuyo Basin has an approximate area of .Zencich et al., 2008, p.110 It has two major sub-basins: Cacheuta () in the north and Alvear () in the south. The northern fringes of Cacheuta sub-basin reaches into San Juan Province. The basin existed already during the Triassic but its current shape is derivative of the Andean orogeny. The basin originated as a rift basin in the context of extensional tectonics and crustal thinning that followed the Paleozoic Gondwanide orogeny. Stratigraphy The stratigraphy of the Cuyo Basin comprises the following formations: See also * Geological history of the Precordillera terrane * Colorado Basin, basin to the southeast of Cuyo Basin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montehermosan
The Montehermosan age is a period of geologic time (6.8–4.0 Mya (unit), Ma) within the Miocene and Pliocene epochs of the Neogene used more specifically with South American Land Mammal Ages. It follows the Huayquerian and precedes the Chapadmalalan age. References Montehermosan, Miocene life Miocene South America Zanclean Neogene animals of South America {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chasicoan
The Chasicoan ( or ) age is a period of geologic time from 10–9 Ma within the Late Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Mayoan and precedes the Huayquerian age. at .org Etymology The Chasicoan is named after theArroyo Chasicó Formation
Arroyo often refers to:
* Arroyo (watercourse), an intermittently dry creek
Arroyo may also refer to:
Places United States
* Arroyo, Pennsylvania
* Arroyo, Puerto Rico, a muni ...
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Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraná Basin
The Paraná Basin (, ) is a large cratonic sedimentary basin situated in the central-eastern part of South America. About 75% of its areal distribution occurs in Brazil, from Mato Grosso to Rio Grande do Sul states. The remainder area is distributed in eastern Paraguay, northeastern Argentina and northern Uruguay. The shape of the depression is roughly Ellipse, elliptical and covers an area of about . The Paraná River, from which the Paraná Basin derived its name, flows along the central axis of the Paraná Basin and drains it. Description The Paraná Basin stretches from the Brazilian state of Mato Grosso in the north to northern Argentina and Uruguay in the south. The southern portion in Uruguay is locally known as Norte Basin.De Santa Ana et al., 2004, p.88Daners et al., 2006, p.148 Pioneer studies The first study on the Brazilian side of the Paraná Basin dates from 1841, when a Brazilian Empire, Brazilian Imperial Government Mission prospected for coal. Turning po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado Basin, Argentina
The Colorado Basin () is a sedimentary basin located in northeastern Patagonia. The basin stretches across an area of approximately , of which onshore in the southern Buenos Aires Province and the easternmost Río Negro Province extending offshore in the South Atlantic Ocean. The basin comprises a sedimentary succession dating from the Permian (pre-rift stage) and Early Cretaceous (rift stage) to the Quaternary, representing the passive margin tectonic phase of the basin history. The Mesozoic rifting in the basin resulted from the break-up of Pangea and the formation of the South Atlantic. Long hiatuses exist in the succession. The basin is of paleontological significance for hosting fossiliferous stratigraphic units dating to the Late Miocene. The Arroyo Chasicó Formation defines the Chasicoan South American land mammal age and contains a rich mammal and other vertebrate fauna. The contemporaneous Cerro Azul Formation has provided fossil rodents, armadillos and opossums. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
