The occurrence consists of a band of Pennsylvanian to Permian limestone of the Azure Lake Formation, Buttle Lake Group, at the northern margin of the Buttle Lake uplift. It extends northeast from El Piveto Mountain and along the southeast slope of Mount Con Reid for 8.9 kilometres, approximately 11 kilometres west of Buttle Lake. In the vicinity of El Piveto Mountain the band bends to the southeast, extending 7.6 kilometres to Golden Hinde Peak.

The unit generally strikes north and dips up to 46 degrees west. It is overlain by flows of the Upper Triassic Vancouver Group, Karmutsen Formation and underlain by volcanic breccia, tuff and argillite. In the vicinity of Mount Con Reid the band is segmented by a series of northwest trending faults. See H-W (092F 330) for a discussion of the revised nomenclature of Buttle Lake uplift stratigraphy.