The Cliff zone is underlain by the contact Pennsylvanian undivided volcanic rocks of the Stikine Assemblage with Upper Triassic marine sediments and volcanic rocks of the Stuhine Group.

Property scale mapping by North American Metals Corp show rocks in the Cliff zone to be ash and/or lapilli tuff of the Stikine Assemblage. Pervasive silica alteration is usually found within or proximal to intensely albitized zones and frequently contains disseminated fine-grained euhedral pyrite. This intense alteration results in a light grey, aphanitic to saccaroidal-textured rock with an indeterminable protolith.

The Cliff zone contains a number of discrete bedding parallel, albite-silica alteration zones that vary in width from less than 1 metre to greater than 10 metres. Rock chip sampling in 1992 yielded very strongly anomalous to high grade gold values in these zones. High grade gold mineralization, very limited in extent, was discovered associated with blebby chalcopyrite mineralization in one alteration zone in the Cliff Zone, yielding 17.6 grams per tonne gold over 5 metres (Assessment Report 22646). Resampling of this area in 1994 failed to duplicate the result, returning 6.85 grams per tonne over 4.6 metres (re-assay yielding 7.61 grams per tonne), and additional sampling along the albite-silica alteration zone failed to return significant gold values, as did sampling of other alteration zones in the Cliff Zone. Almost all the Cliff Zone 1994 samples that returned significant gold values contained copper mineralization, primarily in the form of chalcopyrite. Minor bornite and malachite were also noted.