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Ulan Malgait Formation
The Ulan Malgait Formation is a Late Jurassic geologic formation in Mongolia. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.Weishampel et al., 2004, pp.517-607 It is best known for the Shar Teeg locality which has lent its name to Shartegosuchidae, a family of mesoeucrocodylians (relatives of crocodilians), many of which have been found there; ''Shartegosuchus'' (the family's type genus) means "Shar Teeg crocodile".Dollman et al., 2018 It is divided up into 2 subunits, the lower Shar Teg Beds and the upper Ulan Malgait Beds.Watabe, 2010 The tritylodontids '' Shartegodon, Nuurtherium'' and ''Bienotheroides'' are known from the formation.,Velazco et al., 2017 As is docodontan ''Tegotherium''. The turtles '' Annemys levensis'' and '' Annemys latiens'' and crocodylians '' Sunosuchus shartegensis'' and '' Adzhosuchus fuscus'' were also recovered from the formation.Efimov et al., 2000 Numero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shartegosuchus
''Shartegosuchus'' is a genus of protosuchian-grade crocodylomorph. It is known primarily from PIN 4174/2, the partial deformed skull and jaws of a juvenile. This specimen was discovered in ancient lake deposits of the Tithonian-age Upper Jurassic Tsagaantsav Formation, southwestern Mongolia. The estimated length of the holotype skull is . This genus was similar to ''Nominosuchus'', and both are assigned to the same family (Shartegosuchidae). ''Shartegosuchus'' was described in 1988 by Mikhail Efimov, and the type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ... is ''S. asperopalatum''. References Late Jurassic reptiles of Asia Late Jurassic crocodylomorphs Prehistoric pseudosuchian genera {{paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nominosuchus
''Nominosuchus'' is a genus of protosuchian-grade crocodylomorph. It is known from several specimens discovered in ancient lake deposits of the Tithonian-age Upper Jurassic Tsagaantsav Formation, southwestern Mongolia. The type specimen is PIN 4174/4, a partial skull. ''Nominosuchus'' was not large; its skull length is estimated at . It was similar to ''Shartegosuchus'', and is assigned to the same family (Shartegosuchidae). ''Nominosuchus'' was described in 1996 by Mikhail Efimov, and the type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ... is ''N. matutinus''. References Late Jurassic reptiles of Asia Late Jurassic crocodylomorphs Prehistoric pseudosuchian genera {{paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depositional Environment
In geology, depositional environment or sedimentary environment describes the combination of physical, chemical, and biological processes associated with the deposition of a particular type of sediment and, therefore, the rock types that will be formed after lithification, if the sediment is preserved in the rock record. In most cases, the environments associated with particular rock types or associations of rock types can be matched to existing analogues. However, the further back in geological time sediments were deposited, the more likely that direct modern analogues are not available (e.g. banded iron formations). Types of depositional environments Continental * – type of Fluvial deposit. Caused by moving water in a fan shape (Alluvial Fan) and containing mostly impermeable and nonporous sediments well sorted. * . Often in deserts and coastal regions and well sorted, large scale cross-beds * – processes due to moving water, mainly streams. Common sediments are grav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacustrine
A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger oceans, they do form part of the Earth's water cycle. Lakes are distinct from lagoons, which are generally coastal parts of the ocean. Lakes are typically larger and deeper than ponds, which also lie on land, though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams, which usually flow in a channel on land. Most lakes are fed and drained by rivers and streams. Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers, where a river channel has widened into a basin. Some parts of the world have many lakes formed by the chaotic drainage patterns left over from the last ice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adzhosuchus
''Adzhosuchus'' is an extinct genus of crocodylomorph in the family Shartegosuchidae. Fossils have been found from southwestern Mongolia that date back to the Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name ... period.Efimov, M. B., Gubin, Y. M. and Kurzanov, S. M. (2000). New primitive crocodile (Crocodylomorpha: Shartegosuchidae) from the Jurassic of Mongolia. ''Paleontological Journal'' 34:238–241. References Late Jurassic crocodylomorphs Late Jurassic reptiles of Asia Prehistoric pseudosuchian genera {{Jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunosuchus
''Sunosuchus'' is an extinct genus of goniopholidid mesoeucrocodylian. Fossils are known from China, Kyrgyzstan, and Thailand and are Jurassic in age, although some may be Early Cretaceous. Four species are currently assigned to the genus: the type species ''S. miaoi'' and the species ''S. junggarensis'', ''S. shartegensis'', and ''S. shunanensis''. All species are from China. ''Goniopholis phuwiangensis'', also from Thailand, was reassigned to ''Sunosuchus'' by Andrade ''et al.'' (2011). The material from Kyrgyzstan has not been assigned to any species. Description ''Sunosuchus'' has a long, narrow snout and a small skull table. Several characters help diagnose ''Sunosuchus'' and distinguish it from other taxa. For example, there are wide pits on the back of the frontal bone. The frontal bone also has a distinctive ridge along part of its midline. The lower jaw has a long symphysis where the two halves come together. This symphysis is formed mostly from the mandibles, but als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tegotherium
''Tegotherium'' is an extinct mammaliaform from the Late Jurassic of East Asia. The type species ''T. gubini'' is known from the Shar Teeg Beds of Mongolia and an indeterminate species is also known from the Late Jurassic Qigu Formation The Qigu Formation is a Late Jurassic ( Oxfordian) geologic formation in the Southern Junggar Basin in China. Indeterminate Dinosaur remains are among the fossils that have been recovered from the formation, including theropod teeth and a fibula. ... of China. It belongs to the clade Docodonta. References Docodonts Fossil taxa described in 1994 Taxa named by Leonid Petrovich Tatarinov Prehistoric cynodont genera {{jurassic-animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Docodonta
Docodonta is an Order (biology), order of extinct Mammaliaformes, mammaliaforms that lived during the Mesozoic, from the Middle Jurassic to Early Cretaceous. They are distinguished from other early Mammaliaformes, mammaliaforms by their relatively complex Molar (tooth), molar teeth, from which the order gets its name. Until recently, Docodonta were represented primarily by teeth and jaws found across former Laurasia, (modern-day North America, Europe, and Asia). However, recent discoveries in China include some exceptionally well preserved, almost complete body fossils. Description Skeletal traits Docodonts have a long and low mandible (lower jaw), formed primarily by the tooth-bearing dentary bone. The dentary connects to the cranium via a joint with the Squamosal bone, squamosal, a connection which is strengthened relative to earlier mammaliaforms. The other bones in the jaw, known as postdentary elements, are still connected to the dentary and lie within a groove (the postd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bienotheroides
''Bienotheroides'' is an extinct genus of tritylodontid mammaliamorphs from the Jurassic of China and Mongolia Mongolia; Mongolian script: , , ; lit. "Mongol Nation" or "State of Mongolia" () is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of , with a population of just 3.3 million, .... The genus contains five species, primarily known from cranial remains. References Tritylodontids Prehistoric cynodont genera Middle Jurassic synapsids of Asia Late Jurassic synapsids of Asia Jurassic China Fossils of China Fossil taxa described in 1982 Taxa named by Yang Zhongjian {{Paleo-therapsid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuurtherium
''Nuurtherium'' is an extinct genus of tritylodontid cynodonts of the Late Jurassic Ulan Malgait Formation The Ulan Malgait Formation is a Late Jurassic geologic formation in Mongolia. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.Weishampel et al., 2004, p ... of Mongolia. It contains a single species, ''N. baruunensis'', named by Paúl Velazco and colleagues in 2017. References Prehistoric cynodont genera Fossil taxa described in 2017 Tritylodontids {{Paleo-Therapsid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
