At the Lodgepole Phosphate showing, a 12 centimetre thick phosphorite bed occurs within two limestone horizons at the base of the Jurassic Fernie Group. This phosphorite bed has a phosphate content of 14.3 per cent P2O5 (Open File 1987-16). These strata unconformably overlie strata of the Triassic Sulphur Mountain Formation (Spray River Group). Thrust faulting and small scale folding are abundant.