Plesiosaur and theropod remains are among the fossils that have been recovered from its strata.

It is a sedimentary unit, principally made up of mudstone and siltstone, with calcareous concretions.

Its age is somewhere from Aptian to Albian, that is between 125 and 101 Mya.

The formation is part of the Wilgunya Subgroup, which in turn is part of the Rolling Downs Group of the Eromanga and Surat Basins.

The named beds are the Coreena, Doncaster, Jones Valley, Ranmoor, and Trimble Members.