Formerly of uncertain age, it is now thought to be Early Cretaceous.
A variety of fossils are known from the formation, including those of anurognathid pterosaurs (possibly Jeholopterus) and birds such as the specimen of a very large enantiornithine with a 5 cm (2.0 in) long tibia and a 3.5 cm (1.4 in) long pygostyle.
Frogs have also been found in the formation.
[1][2] Numerous compression fossils of insects have also been found.
[3] Fish Amphibians Pterosaurs Dinosaurs Birds Non-Avian Dinosaurs Mammals Insects[8] Conchostracans