The Black Bear occurrence consists of coarsely crystalline galena, associated with sphalerite and pyrite in a quartz gangue hosted by Helikian Aldridge Formation (Purcell Supergroup) quartzites. No observations of the geological setting have been recorded from the workings but specimens on the dump indicate the sulphides may have been associated with the contact zone of a diorite sill of the Proterozoic Moyie Intrusions and Aldridge quartzites.