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Candelaria Formation, Nevada
The Candelaria Formation is a Formation (geology), geologic formation in Nevada, United States. The formation comprises shales and limestones deposited in an open marine depositional environment, environment and preserves fossils dating back to the Induan (Griesbachian to Dienerian) age (geology), age of the Early Triassic epoch (geology), epoch.Candelaria Formation at Fossilworks.org Fossil content Among others, the following fossils of ammonoids, bivalves and ray-finned fishes have been recovered from the formation: * ''Ambites, Ambites lilangensis'' * ''Ambites, Ambites aff. radiatus'' * ''Ardoreosomus, Ardoreosomus occidentalis'' * ''Candelarialepis, Candelarialepis argentus'' * ''C ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob We ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was created in 1998 by John Alroy and is housed at Macquarie University. It includes many analysis and data visualization tools formerly included in the Paleobiology Database.{{cite web, title=Frequently asked questions, url=http://www.fossilworks.org/cgi-bin/bridge.pl?page=FAQ, publisher=Fossilworks, access-date=17 December 2021 References {{Reflist External links {{Wikidata property, P842 * [Baidu] |
Meekoceras
''Meekoceras'' is a genus of ceratitid ammonites with a discoidal shell that lived during the Early Triassic Epoch In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured. The moment of epoch is usually decided by .... Description ''Meekoceras'' is characterized by a compressed, discoidal, evolute or involute shell with flattened sides and narrow, flattened or rounded venter that is without keels or furrows. The surface is smooth or with lateral folds, but no tubercles, spines, or spiral ridges. Umbilicus variable, body chamber short. Sutures ceratitic with smooth rounded saddles and serrated lobes. Taxonomic position Smith (1932) and Arkell et al. (1957) included ''Meekoceras'' in the Meekoceratidae, which was named to contain the genus. Different approaches were made regarding the next taxonomic level. Arkell, et al. (1957) i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyrolepis
''Gyrolepis'' is an extinct genus of prehistoric ray-finned fish from the Middle-Late Triassic epochs in what is now Europe. It is known both from complete specimens and isolated skeletal elements, such as scales or teeth. See also * Prehistoric fish The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fis ... * List of prehistoric bony fish References External links Bony fish in the online Sepkoski Database Prehistoric bony fish genera {{Palaeonisciformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grypoceras
''Grypoceras'' is a coiled nautiloid cephalopod from the Triassic of western North America, southern Asia, and Europe that belongs to the nautilid family Grypoceratidae. Named by Alpheus Hyatt Alpheus Hyatt (April 5, 1838 – January 15, 1902) was an American zoologist and palaeontologist. Biography Alpheus Hyatt II was born in Washington, D.C. to Alpheus Hyatt and Harriet Randolph (King) Hyatt. He briefly attended the Maryla ... in 1883, the shell of ''Grypoceras'' is essentially involute with a subtriangular cross section, widest across the umbilical shoulders, with flanks fairing toward a narrow flattened venter. Sutures on flanks are with smooth, deep lobes and with shallow ventral lobes. The earlier, related '' Domatoceras'' is evolute, with a more quadrate whorl section. '' Gryponautilus'', from the Upper Triassic, is more strongly involute and has a sharply keeled venter. References * Bernhard Kummel, 1964, Nautiloidea-Nautilida. Treatise on Invertebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claraia
''Claraia'' is an extinct genus of scallop-like bivalve molluscs that lived from the Capitanian stage of the Late Permian to the Anisian stage of the Middle Triassic, 266-237 million years ago. Fossils have been found worldwide in North America, Europe, Asia, Africa, and Australia. These are common fossils subsequent to the Permian-Triassic boundary, suggesting that the genus experienced rapid diversification during and after the Permian–Triassic extinction event, around 251.4 million years ago. Ecology ''Claraia'' may have been an opportunistic genus that filled the niche of many benthic invertebrates such as brachiopods that were heavily impacted by the extinction. A narrowing of the byssal notch and a trend towards a smoother shell in species of ''Claraia'' over time may have led to increased mobility. This increase in mobility may have been an advantage over more sessile animals during the extinction event.Feng, Qinglai; Gu, Songzhu; He, Weihong; Meng, Youyan; Weldon, E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claraia Aurita
''Claraia'' is an extinct genus of scallop-like bivalve molluscs that lived from the Capitanian stage of the Middle Permian to the Anisian stage of the Middle Triassic, 266-237 million years ago. Fossils have been found worldwide in North America, Europe, Asia, Africa, and Australia. These are common fossils subsequent to the Permian-Triassic boundary, suggesting that the genus experienced rapid diversification during and after the Permian–Triassic extinction event, around 251.9 million years ago, making it a Disaster taxon Ecology ''Claraia'' may have been an opportunistic genus that filled the niche of many benthic invertebrates such as brachiopods that were heavily impacted by the extinction. A narrowing of the byssal notch and a trend towards a smoother shell in species of ''Claraia'' over time may have led to increased mobility. This increase in mobility may have been an advantage over more sessile animals during the extinction event.Feng, Qinglai; Gu, Songzhu; He, We ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Candelarialepis
''Candelarialepis'' is an extinct genus of prehistoric ray-finned fish that lived during the Induan age of the Early Triassic epoch in what is now Nevada. It was described from the Candelaria Formation. See also * List of prehistoric bony fish * Paleontology in Nevada Paleontology in Nevada refers to paleontological research occurring within or conducted by people from the U.S. state of Nevada. Nevada has a rich fossil record of plants and animal life spanning the past 650 million years of time. The earliest fo ... References Parasemionotiformes Early Triassic fish Early Triassic animals of North America Extinct animals of the United States Prehistoric ray-finned fish genera {{triassic-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ardoreosomus
''Ardoreosomus'' (meaning: "tropical body") is an extinct genus of ray-finned fish. It was described from the Induan aged Candelaria Formation of Nevada, United States, which was located near the equator during the Early Triassic epoch. It contains only one species, ''A. occidentalis'' (monotypy). ''Ardoreosomus'' is a ptycholepiform, closely resembling '' Boreosomus'' and '' Ptycholepis''; however, ''Ardoreosomus'' is distinguished from other ptycholepiforms in having a more strongly angled hyomandibula and lacking an opercular process, among other features. See also * Prehistoric fish * List of prehistoric bony fish * Paleontology in Nevada Paleontology in Nevada refers to paleontological research occurring within or conducted by people from the U.S. state of Nevada. Nevada has a rich fossil record of plants and animal life spanning the past 650 million years of time. The earliest fo ... References Prehistoric ray-finned fish genera {{Triassic-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
