The Camfield Fossil Beds which contain the Bullock Creek local fauna consist of light coloured calcareous sandstone, siltstone and limestone.
The presentation of fossils at the site ranges from poorly sorted fragmentary lags to associations with partial skeletons which includes complete crania (skulls) with intact delicate structures.
The Bullock Creek Fossil Site is of natural significance in providing evidence for the evolution of the Northern Territory's fauna and climate.
Among the fossils at the Bullock Creek site have been found complete marsupial crania with delicate structures intact.
The extensive collection of Neohelos (large browsing marsupial) remains from the Camfield beds has initiated a review of the mid Miocene zygomaturine diprotodontids.