The area is underlain by greenstones and crystalline limestone near granodiorite of the Coast Plutonic Complex.

Irregular patches of pyrite and chalcopyrite occur in the meta- sediments on a point jutting from the north side of Kildala River flats. The mineralization is probably hosted in a skarn as evidenced by the presence of garnet and epidote.

About 2.8 kilometres to the north and at elevation 120 metres, similar mineralization occurs which assayed trace gold, silver and copper across 3 metres. Earlier reports of 1.7 per cent tin could not be confirmed (Geological Survey of Canada, Paper 70-41).