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.

Fossil content
The following fossils were reported from the formation:
 * Dongyangopelta yangyanensis
 * Therizinosauridae indet. (once known as "Chilantaisaurus" zheziangensis)
 * Zhejiangosaurus lishuiensis