Ermaying Formation

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Type Geological formation
Thickness Up to 600 m
Coordinates 37°26′15″N 110°39′06″E / 37.43750°N 110.65167°E / 37.43750; 110.65167Coordinates: 37°26′15″N 110°39′06″E / 37.43750°N 110.65167°E / 37.43750; 110.65167
Region Shaanxi
Country China

The Ermaying Formation is a sedimentary succession of Anisian (Middle Triassic) age. It is found in the Shaanxi Province of China.[1] It is composed of an up to 600 m thick sequence of mudstone and sandstone.[2] It is famous for its fossils of tetrapods.[2]


Notable fossils include the genera Fenhosuchus, Eumetabolodon, Halazhaisuchus, Guchengosuchus, Neoprocolophon, Ordosiodon, Wangisuchus and Shansisuchus.


  1. ^ Desojo, J. B. (2013). Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their Kin. ISBN 978-1862393615. 
  2. ^ a b Sues, Hans-Dieter; Fraser, Nicholas C. (2010). Triassic life on land : the great transition. New York: Columbia University Press. ISBN 978-0231135221.