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 References Geologic formations of China Cretaceous System of Asia Albian Stage Cenomanian Stage Sandstone formations Siltstone formations Tuff formations Lacustrine deposits Paleontology in Zhejiang