The Whymper occurrence is located on the eastern flank of Mount Whymper, west of Rheinhart Creek.

The area is underlain by metasedimentary rocks of the Mississippian to Pennsylvannian Fourth Lake Formation (Buttle Group) and volcanic rocks of the Upper Devonian McLaughlin Ridge Formation (Sicker Group). These two formations were historically referred to as the Myra Formation and contained the ‘Sediment-Sill unit’ of the Sicker Group. The Sediment-Sill unit has been tentatively correlated with the Fourth Lake Formation and the ‘sills’ have been mapped separately. The sills are believed to be coeval with the Karmutsen Formation basalts and are informally named Mount Hall gabbro. These rocks have been intruded by granitic rocks of the Early to Middle Jurassic Island Plutonic Suite.

Locally, light grey, silicified, intermediate volcanics host up to 10 per cent sulphide-calcite, stock works of pyrite, sphalerite and trace chalcopyrite. The host rock has been brecciated and contains stringers and blebs of fine grained sulphides. In 2011, a sample (18012) assayed 2.41 grams per tonne silver, 334 parts per million copper and greater than 10,000 parts per million zinc (Assessment Report 32850).

From 2009 through 2011, Rock-Con Exploration completed programs of spectral analysis, prospecting and rock and soil sampling on the Sognidoro property.