The area is underlain by acid to intermediate volcanics of the Weaver Lake Member of the Lower-Middle Jurassic Harrison Lake Formation. Pyroclastic rocks appear more abundant than flows and form poorly stratified volcanic breccias to well-bedded tuffs.

Locally, the Hooey property is underlain by sequences of pyroclastics of the Weaver Lake Member and sedimentary rocks comprised of black argillites, tuffs and coarser sandstone units belonging to the Middle-Upper Jurassic Mysterious Creek Formation. The bedding is variable up to several metres in thickness. Fine grained, medium to light green andesitic tuff containing chloritized lapilli fragments of the Harrison Lake Formation comprise the major unit on the property.

Sphalerite, galena, chalcopyrite and pyrite was found in shears and quartz veins within the andesite tuff. The extent of the mineralization is not known but was sporadic over 300 metres. The shear zones or quartz veins averaged 1.0 to 2.0 metres in width along a northwest trend. Rock chip sampling indicated local concentrations of zinc, lead and copper with minor silver values. In 1982, chip sampling across 16.1 metres averaged 4.11 grams per tonne silver, 0.21 per cent zinc, 0.19 per cent lead and 0.05 per cent copper. A higher grade shear zone 1.1 metres in width averaged 8.9 grams per tonne silver, 0.68 per cent zinc, 0.49 per cent lead and 1.3 per cent copper (Assessment Report 10661).