{{Short description|Geologic formation in Govi-Altai, Mongolia}} {{Infobox rockunit | name = Ulan Malgait Formation | image = | caption = | type = [[Geological formation]] | age = [[Tithonian]] or [[Oxfordian stage|Oxfordian]]<br>~{{fossilrange|160|145}} | period = Late Jurassic | prilithology = [[Mudstone]] | otherlithology = [[Sandstone]], [[Conglomerate (geology)|conglomerate]], [[caliche]] | namedfor = [[Ulan Malgait Mountain]] | namedby = | region = [[Govi-Altay]] | country = [[Mongolia]] | coordinates = {{coord|44.1|N|95.8|E|display=inline,title}} | paleocoordinates = {{coord|46.0|N|98.0|E|display=inline}} | unitof = | subunits = Shar Teg & Ulan Malgait Beds | underlies = | overlies = | thickness = up to ~{{convert|300|m|ft|abbr=on}} | extent = | area = | map = {{Location map+ | Mongolia | relief = 1 | width = 250 | float = center | places = {{Location map~ | Mongolia | lat_deg = 44.1 | lon_deg = 95.8 | mark = Cyan pog.svg | marksize = 10 }} }} | map_caption = }}
The '''Ulan Malgait Formation''' is a [[Late Jurassic]] geologic [[Formation (geology)|formation]] in [[Mongolia]]. [[Dinosaur]] remains are among the fossils that have been recovered from the formation, although {{as of|2004|lc=y}} none have yet been referred to a specific [[genus]].<ref name="dinosaurdistribution">Weishampel et al., 2004, pp.517-607</ref>
It is best known for the '''Shar Teeg''' locality which has lent its name to [[Shartegosuchidae]], a [[Family (taxonomy)|family]] of [[mesoeucrocodylia]]ns (relatives of crocodilians), many of which have been found there; ''[[Shartegosuchus]]'' (the family's [[type genus]]) means "Shar Teeg crocodile".<ref name=Dollman2018>Dollman et al., 2018</ref> It is divided up into 2 subunits, the lower '''Shar Teg Beds''' and the upper '''Ulan Malgait Beds'''.<ref name=Watabe2010>Watabe, 2010</ref>
The [[Tritylodontidae|tritylodontids]] ''[[Shartegodon]], [[Nuurtherium]]'' and ''[[Bienotheroides]]'' are known from the formation.,<ref name=Velazco2017>Velazco et al., 2017</ref> As is [[docodonta]]n ''[[Tegotherium]]''. The turtles ''[[Annemys|Annemys levensis]]'' and ''[[Annemys|Annemys latiens]]'' and crocodylians ''[[Sunosuchus|Sunosuchus shartegensis]]'' and ''[[Adzhosuchus|Adzhosuchus fuscus]]'' were also recovered from the formation.<ref name=Efimov2000>Efimov et al., 2000</ref> Numerous species of insects are also known from the formation.<ref>I. D. Sukacheva. 2000. New fossil caddis flies (Trichoptera) from the Shar-Teg locality in Mongolia. ''Paleontological Journal'' '''34(Suppl 3)''':S347-S351</ref><ref>{{Cite web|title=Shar-Teg, outcrop 443/1 (PIN collection 4270)|url=https://paleobiodb.org/classic/displayCollResults?collection_no=104748|website=Paleobiology Database|via=fossilworks}}</ref><ref>{{Cite web|title=Shar-Teg, outcrop 423/6 (PIN collection 4270)|url=https://paleobiodb.org/classic/displayCollResults?collection_no=121394|website=Paleobiology Database|via=fossilworks}}</ref><ref>{{Cite web|title=Shar-Teg, outcrop 441/4 (PIN collection 4270)|url=https://paleobiodb.org/classic/displayCollResults?collection_no=152133|website=Paleobiology Database|via=fossilworks}}</ref> which was deposited in a [[lacustrine]] [[depositional environment|environment]].
== Age == Dollman et al. (2018) argue that the age of the Ulan Malgait Formation is likely to be [[Oxfordian stage|Oxfordian]] based on the shared presence of ''[[Shartegosuchus]]'' and ''[[Nominosuchus]]'' with the radiometrically dated [[Shishugou Formation|Shishigou Formation]] of China.<ref name=FWBorUkhaaHills>[https://paleobiodb.org/classic/displayCollResults?collection_no=69913 Bor Ukhaa hills] at [[Fossilworks]].org</ref>
== See also == * [[List of dinosaur-bearing rock formations]] ** [[List of stratigraphic units with indeterminate dinosaur fossils]]
== References == {{Reflist|3}}
=== Bibliography === <!--Most recent first--> * {{cite journal |last1=Dollman |first1=K. N. |first2=J. M. |last2=Clark |first3=M. A. |last3=Norell |first4=X. |last4=Xu |first5=J. M. |last5=Choiniere |year=2018 |title=Convergent Evolution of a Eusuchian-Type Secondary Palate within Shartegosuchidae |journal=[[American Museum Novitates]] |issue=3901 |pages=1–23|doi=10.1206/3901.1 }} * {{cite journal |first1=Paúl M. |last1=Velazco |first2=Alexandra J. |last2=Buczek |first3=Michael J. |last3=Novacek |year=2017 |title=Two new tritylodontids (Synapsida, Cynodontia, Mammaliamorpha) from the Upper Jurassic, southwestern Mongolia |journal=[[American Museum Novitates]] |issue=3874 |pages=1–35| doi=10.1206/3874.1| hdl=2246/6698|hdl-access=free }} * {{cite journal |last=Watabe |first=Mahito |year=2010 |title=Geology of dinosaur-fossil-bearing localities (Jurassic and Cretaceous: Mesozoic) in the Gobi Desert: Results of the HMNS-MPC Joint Paleontological Expedition |url=https://www.academia.edu/3119116 |journal=[[Hayashibara Museum of Natural Sciences Research Bulletin]] |publisher=Hayashibara Museum of Natural Sciences |volume=3 |pages=41–118}} * {{cite book |editor-last=[[David B. Weishampel|Weishampel]] |editor-first=David B. |editor-last2=[[Peter Dodson|Dodson]] |editor-first2=Peter |editor-last3=[[Halszka Osmólska|Osmólska]] |editor-first3=Halszka |year=2004 |title=The Dinosauria|edition=2nd |url=https://books.google.com/books?id=vtZFDb_iw40C |location=Berkeley|publisher= University of California Press |pages=1–880 |accessdate=2019-02-21|isbn=0-520-24209-2}} * {{cite journal |last1=Efimov |first1=M. B. |first2=Y. M. |last2=Gubin |first3=S. M. |last3=Kurzanov |year=2000 |title=New primitive crocodile (Crocodylomorpha: Shartegosuchidae) from the Jurassic of Mongolia |journal=[[Paleontological Journal]] |volume=34 |pages=S238–S241}}
== Further reading == <!--Most recent first--> * M. Rabi, V. B. Sukhanov, V. N. Egorova, I. Danilov, and W. G. Joyce. 2014. Osteology, relationships, and ecology of Annemys (Testudines, Eucryptodira) from the Late Jurassic of Shar Teg, Mongolia, and phylogenetic definitions for Xinjiangchelyidae, Sinemydidae, and Macrobaenidae. Journal of Vertebrate Paleontology 34(2):327-352 * M. Watabe, K. Tsogtbaatar, T. Tsuihiji and R. Barsbold. 2003. The first discovery of diverse Jurassic dinosaur faunas in Mongolia. Journal of Vertebrate Paleontology 23(3, suppl.):108A * V. B. Sukhanov. 2000. Mesozoic turtles of Middle and Central Asia. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia 309–367 * Y. M. Gubin and S. M. Sinitza. 1996. Shar Teg: a unique Mesozoic locality of Asia. In M. Morales (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60:311-318
[[Category:Geologic formations of Mongolia]] [[Category:Jurassic System of Asia]] [[Category:Jurassic Mongolia]] [[Category:Tithonian Stage]] [[Category:Oxfordian Stage]] [[Category:Sandstone formations]] [[Category:Siltstone formations]] [[Category:Lacustrine deposits]] [[Category:Paleontology in Mongolia]] [[Category:Govi-Altai Province|Formations]]