At the Fernie Ski Hill showing, a phosphorite-phosphatic siltstone bed 50 to 70 centimetres thick, occurs near the top of the Permian Ranger Canyon Formation (Ishbel Group). This bed contains 13.3 per cent P2O5 (Open File 1987-16). Also present are several thin beds averaging 0.5 metres thick and containing less than 2.0 per cent P2O5 in the underlying Johnson Canyon Formation (Ishbel Group).