The Wallace-Adit showing is located on the western slope of Ursus Mountain.

The area is underlain by volcanics of the Upper Triassic Karmutsen Formation (Vancouver Group), which are intruded by granitic rock of the Jurassic Island Plutonic Suite. In the Bedwell River area, the Karmutsen rocks consist of fine-grained andesites and black or dark green basalts. The Jurassic plutonic rocks on Vancouver Island vary in composition from gabbro to quartz monzonite but are mainly granodiorite and quartz diorite.

Locally, an old adit, approximately 7.5 metres long, has exposed a zone of copper mineralization, reportedly ranging from 3 to 10 per cent (Property File, Wallace 1970).