The Umbrella showing area is dominated by a thick succession of intermediate to felsic volcanic rocks of the Lower Jurassic Telkwa Formation. Dacite and andesite flows, breccias and volcaniclastic rocks as well as small localized areas of basalt are typical. Sedimentary rocks of the Lower Cretaceous Skeena Group occur as a minor constituent of the local property geology.

The main Umbrella showing is exposed on a steep bank about 50 metres high that exposes patches of recessive-weathering, mineralized andesite and three monzonite dikes which form prominent outcrops. The monzonite dikes vary in thickness from about 1 to 5 metres and are spaced about 15 metres apart. Contacts are poorly exposed, but the intrusions appear to strike at about 238 degrees and dip steeply. The andesite shows strong and pervasive chlorite–hematite alteration along with patches of carbonate alteration and local zones of weak to moderate silicification.

Mineralization consists of bornite and chalcocite filling fractures and as disseminated blebs up to about 5 millimetres. Malachite staining is wide spread and coats numerous fractures. The chalcocite is found as crystalline, tabular, book like masses filling fractures and as a black sooty coating, suggesting that not all of the chalcocite is derived from alteration of bornite. Pyrite was not observed. Mineralization is not associated with quartz or calcite veining, although irregular calcite veining is present in the volcanic rock.

Two grab samples of chalcocite chalcopyrite stockwork mineralization collected in the 2008 program graded greater than 1 per cent copper and 100 grams per tonne silver (Assessment Report 30454).