Chaochuan Formation

The Chaochuan Formation is a geologic formation in China (Zhejiang Province). It is made up of purplish red calcarenaceous, muddy siltstone, fine-grained sandstone with interbeds of tuffaceous sandstone and conglomerate or rhyolitic tuff.^[1]

Chaochuan Formation
Stratigraphic range: Albian-Cenomanian ~112–94 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Underlies	Fangyan Formation
Overlies	Early Cretaceous tuff and Moshishan Group
Thickness	up to 518 metres (1,699 ft)
Lithology
Primary	Sandstone, siltstone
Other	Tuff
Location
Coordinates	28.7°N 119.2°E / 28.7; 119.2
Approximate paleocoordinates	35.6°N 117.0°E / 35.6; 117.0
Region	Zhejiang Province
Country	China
Chaochuan Formation (China) Show map of China Chaochuan Formation (Zhejiang) Show map of Zhejiang

Fossil content

The following fossils were reported from the formation:

• Dongyangopelta yangyanensis^[2]
• Therizinosauridae indet. (once known as "Chilantaisaurus" zheziangensis)^[3][4][5]
• Zhejiangosaurus lishuiensis^[6]