The area of the Riff occurrence is underlain by rock of the Upper Paleozoic Anarchist Group. Smaller plugs, dikes and sills of Middle Jurassic to Cretaceous age intrude the Anarchist Group rocks.

Within the northern portion of Ultralines Mineral Services’ RCR-2 mineral claim copper mineralization, as exhibited in malachite staining, occurs within carbonatized ultramafic sills also associated with inferred Tertiary aged northeast trending faults. In the southern portion of the RCR-2 claim, a 10 meter deep pit is found along the trace of a 6 to 40 centimetre wide north trending quartz vein with between 2 and 10 per cent pyrite and chalcopyrite. Tertiary aged faulting is also present locally and is inferred to be the controlling factor for mineralization. Ultraline worked the property in 1989 and 1990.

In 1984, a VLF-EM and a magnetometer survey was completed over the eastern third of the Corn claim for Coronado Resources Inc., who had conducted geological mapping in 1983.

A number of copper and nickel occurrences are reported on Dekalb Mining Corporation’s Riff claims in 1970, the same area occupied later by the RCR-2 and Corn claims. They report copper in diorite near andesite and quartz-phyllite. Dekalb also reported isolated small occurrences of nickel in serpentine-talc or as nickel silicates in quartzites. A sample of serpentinized ultramafic yielded 0.24 per cent nickel (Assessment Report 2882).

During 2008 through 2012, Grizzly Discoveries Inc. completed programs of geochemical sampling, geological mapping and ground geophysical surveys on the area as the Greenwood property.