The area is underlain by rocks of the Lower to Middle Jurassic Harrison Lake Formation comprised mainly of pyroclastics and rhyolitic to andesitic flows. These overlie Lower Jurassic calcareous siltstones, shales and sandstones of the West Road Member of the Harrison Lake Formation. Triassic Camp Cove Formation rocks are also exposed and comprise andesitic to basaltic flows, siliceous siltstone and sandstone.

There are two bright orange, limonitic gossans located on the Kuro property. Calcareous siltstones host between 1 to 2 per cent sulphides comprised mainly of disseminated pyrite. A feldspar porphyry dike estimated at 15 to 20 metres in thickness and striking about 030 degrees with a dip of 80 degrees northwest, crosscuts the calcareous strata. Associated with the dike are disseminated and blebs of chalcopyrite, pyrite with minor sphalerite and galena. Pyritic veinlets occur in rhyolitic breccia and are associated with low gold values and black chalcocite.

In 1986, a sample of the pyritized rhyolite yielded 0.001 gram per tonne gold, 1.0 grams per tonne silver, 0.076 per cent copper and 0.028 per cent lead. A sample from a calcareous sandstone containing calcite veins analysed 0.001 gram per tonne gold, 0.4 gram per tonne silver and 0.005 per cent copper (Assessment Report 15462).