Wallumbilla Formation
Introduction The '''Wallumbilla Formation''' is an Aptian geologic formation found in Australia. Plesiosaur and theropod remains are among the fossils that have been recovered from its strata.
Description The formation is present in the Northern Territory, Queensland, South Australia, and New South Wales. It is a sedimentary unit, principally made up of mudstone and siltstone, with calcareous concretions. Its maximum thickness is 600 metres. 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.
Fossil content  '''Paleofauna of the Wallumbilla Formation''' Genus  Species  Location  Stratigraphic position  Abundance  Notes  Images ''Notopala'' Cotton, 1935 † ''Notopala albascopularis'' (Etheridge, 1902) White Cliffs, New South Wales The oldest freshwater snail in Australia. ''Kronosaurus'' Indeterminate White Cliffs   A pliosaur, also found in Queensland's Toolebuc Formation and Colombia's Paja Formation  Theropoda  Indeterminate      ''Platypterygius'' Indeterminate    An ichthyosaur
See also * Plesiosaur stratigraphic distribution* South Polar region of the Cretaceous
References
Further reading * E. F. Riek. 1954.A second specimen of the dragon-fly ''Aeschnidiopsis flindersiensis'' (Woodward) from the Queensland Cretaceous. The Proceedings of the Linnean Society of New South Wales 79:61-62