The Goat Mountain showing is described only as a quartz vein with values in copper, gold, silver and some lead; even the location is poorly known, as "near the Alice claim" (Lot 4104, on the adjacent 82F/2E sheet, 082FSE007). The geology is generalized from the description of Middle Aldridge Formation sedimentary rocks in Brown and Stinson (Fieldwork 1994, page 115) as quartzofeldspathic wacke to quartz wacke, with lesser argillite, mainly turbidites. The sedimentary rocks are intruded by gabbro sills of the Moyie intrusions; both sedimentary and intrusive rocks belong to the Purcell Supergroup of Middle Proterozoic age. Country rock at the mouth of one of the adits on the property is greenstone, likely a gabbro sill.