Vertical dipping phosphorite, sandstone and shale of the Jurassic Fernie Group overlie silty dolomite of the Middle or Upper Triassic Whitehorse Formation. The phosphorite bed at the Bingay showing is 1.04 metres thick and contains 11.8 per cent P2O5 (Open File 1987-16). The top of the phosphate horizon is marked by an orange weathering calcareous horizon and the base is marked by a thin conglomerate unit. The phosphorite bed is comprised of pelletal phosphate and contains a few shell fragments.