It is early Bathonian in age.

The lower member is several hundred metres thick, and consists largely of mudstone with lens beds of cross bedded sandstone, with thin intercalations of limestone that was deposited in a freshwater continental setting, likely lacustrine or palustrine, with small marine influences.

[1] The upper member is several tens of metres thick and consists of limestone deposited in a shallow marine setting.

The formation is fossiliferous, with several of the limestone intercalations yielding a diverse fauna, including amphibians, reptiles, dinosaurs and mammals.

An isolated spine displaying characters seen in extant cypriniform or siluriform fishes has been recovered, alternatively can belong to a member of Myriacanthidae.