The area is underlain by poorly exposed rocks of the Cache Creek which, in the Williams Lake region, consists mainly of mafic metavolcanic rocks, argillaceous metasediments and ultramafic bodies, now sheared and altered. The property is located adjacent to the eastern end of Williams Lake 6.4 kilometres east of town and is underlain by the Mississippian to Triassic Cache Creek Group which, to the west and east, are covered by Tertiary volcanic rocks and sediments. Pleistocene till covers much of the area to the north.

In this area serpentinite is in shear contact with underlying limestone. This shear zone strikes to the northeast and dips to the northwest. Within the shear zone is ankerite, calcite and minor pyrrhotite and chalcopyrite and a green mineral of low nickel content (?mariposite). A sample from the shear zone assayed 0.15 per cent nickel while the overlying serpentinite assayed 0.23 per cent nickel (Annual Report 1935 p. C32).