The area is underlain by probable Lower Paleozoic meta- sedimentary and metavolcanic rocks. The dominant structure is a north-south trending isoclinal antiform, plunging gently to the north.

Small quantities of slip-fibre asbestos and larger amounts of pure, light green talc are exposed along shear zones in the greenstones of the west limb of the antiform. The talc also occurs with carbonates and serpentine along broad zones of alteration in the greenstone.

Mineralized lenses up to 1.5 metres wide contain pyrite, pyrrhotite, chalcopyrite, and minor sphalerite as fine-grained mixtures.