At the North Sulphur Creek showing, a poorly exposed coquinoid bed of the Permian Ross Creek Formation (Ishbel Group) contains a few phosphate nodules as well as disseminated phosphate pellets and cement. Some of the brachiopod shells within the coquinoid bed have been phosphatized. This phosphatic horizon is 90 centimetres thick and contains 0.9 per cent P2O5 (Open File 1987-16).