Ulansuhai Formation

Ulansuhai Formation
Stratigraphic range: Turonian
~92 Ma
TypeGeological formation
Unit ofDashuigou Group
Lithology
PrimaryClaystone, siltstone
Location
Coordinates40°18′N 105°54′E / 40.3°N 105.9°E / 40.3; 105.9Coordinates: 40°18′N 105°54′E / 40.3°N 105.9°E / 40.3; 105.9
Approximate paleocoordinates41°30′N 97°12′E / 41.5°N 97.2°E / 41.5; 97.2
RegionInner Mongolia
Country China
Ulansuhai Formation is located in China
Ulansuhai Formation
Ulansuhai Formation (China)
Ulansuhai Formation is located in Inner Mongolia
Ulansuhai Formation
Ulansuhai Formation (Inner Mongolia)

The Ulansuhai Formation (simplified Chinese: 乌兰苏海组; traditional Chinese: 烏蘭蘇海組; pinyin: Wūlánsūhǎi Zǔ) is a geological formation in Inner Mongolia, north China. Dinosaur remains are among the fossils that have been recovered from the formation.

The Ulansuhai Formation has traditionally been considered to date to the Aptian-Albian stages of the Lower Cretaceous, due to similarities between the Ulansuhai fauna and known Aptian formations. However, radiometric dating done on underlying formations has shown this to be incorrect. Due to the age of underlying rocks, the Ulansuhai Formation cannot be older than the Turonian stage of the Late Cretaceous, about 92 Ma.

Fossil content

Dinosaurs

Dinosaurs
Taxa Presence Description Images
Chilantaisaurus tashuikouensis A Neovenatorid. "Fragmentary postcranial skeleton."
An ankylosaur. "Skull [and possible] postcranium."
A carcharodontosaurid, formerly Chilantaisaurus maortuensis.
Sinocephale bexelli A Pachycephalosaurid, known from now lost skull fragments. Formerly Troodon bexelli.
An ornithomimid. "[Fourteen] skeletons, juvenile to adult."

Testudines

Turtles
Taxa Presence Description Images
Kuhnemys maortuensis A Pantrionychid turtle

Ostracods

Caption text
Taxa Presence Description Image
cf. Cypridea A Cyprideid

See also


This page was last updated at 2022-12-27 13:26 UTC. Update now. View original page.

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