Sunjiagou Formation

The Sunjiagou Formation is a geological formation in Shanxi, China. It is of Lopingian age. The lower and middle parts of the formation consists of intensely bioturbated fine grained sandstones and thinly interbedded mudstones, deposited in a shallow-shore lake depositional environment, while the upper part consists of fine grained sandstone, siltstone and mudstone.^[1] Alongside the Naobaogou Formation, it has provided an important vertebrate fauna.

Sunjiagou Formation
Stratigraphic range: Late Wuchiapingian-earliest Induan PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Shiqianfeng Group
Underlies	Liujiagou Formation
Overlies	Shangshihezi Formation
Thickness	100-200 metres
Lithology
Primary	Sandstone, Siltstone, Mudstone
Location
Country	China
Extent	Shanxi

Paleobiota

Genus	Species	Material	Notes
Sanchuansaurus[2]	S. pygmaeus		Pareiasaur
Shihtienfenia [2]	S. permica		Pareiasaur
Seroherpeton[3]	S. yangquanensis	right upper jaw and palate	Embolomeri
Taoheodon[4]	T. baizhijuni		Dicynodont
Cryptodontia[5]	Indeterminate	Partial skull	Dicynodont