Formation of Coal Beds

Wukongopteridae: Pterosaur, Tiaojishan Formation, Daohugou Beds, Jurassic

Bahariasaurus: Bahariya Oasis, Genus, Theropod, Dinosaur, Formation, Kem Beds, Cretaceous, ''Deltadromeus'', ''Tyrannosaurus''

Economic Geology: Principles and Practice. Metals, Minerals, coal Hydrocarbons Introduction to Formation...