Two major units of the Helikian Purcell Supergroup are recognized on the Green property. The oldest is the Sheppard Formation comprised of sandstone and conglomerate locally at the base, and dolomitic quartzite, sandstone, oolitic dolomite and stromatolitic dolomite at the top. The Nicol Formation is comprised of massive to amygdaloidal basaltic to andesitic lava flows, volcanic and feldspathic sandstone and siltite. Green, locally purple volcaniclastic siltite, fine wacke and tuffaceous siltstone are also part of the Nicol Formation. The Sheppard Formation is gently warped, with dips up to 15 degrees to the east.
Several modes of mineralization are evident on the property: 1) disseminated chalcocite and chalcopyrite occur in sandstones below a stromatolitic dolomite horizon; 2) quartz-barite veins containing scattered patches of chalcocite and chalcopyrite (+/- specularite); 3) weak disseminated chalcopyrite +/- chalcocite within the lowermost one metre of stromatolitic dolomite at the base of the Sheppard Formation; and 4) one occurrence of a fine-grained syenite dyke with quartz-barite veinlets carrying disseminated chalcopyrite.
Trenching in an area exhibiting the first mode of mineralization (see above), returned an assay high of 1.93 per cent copper. Low grade silver values up to 9 grams per tonne were also recorded (Assessment Report 19898).