The Park occurrence consists of a 1.5 metre wide quartz- carbonate vein within a Proterozoic Moyie Intrusions diorite sill occurring in Helikian Aldridge Formation (Purcell Supergroup) argillite, quartzite and greywacke. Sulphides are restricted to galena with very minor pyrite. Assays indicate 100 to 200 grams of silver and from 18 to 71 per cent lead but these are probably from hand-cobbed ore material.