The claims are located on the east side of Dean Channel, midway between Kimsquit and Labouchere Channel. The claims were acquired by B.T. Jacobsen, T. Oleon, and A.J. Enjuich in 1928. Some trenching and a 6-metre adit were completed.

The region is underlain mainly by the Paleozoic to Tertiary Coast Plutonic Complex consisting predominantly of crystalline rocks which exhibit a variety of fabrics ranging from pre-to post- kinematic. Paragneisses of (?)Paleozoic age, younger deformed metasediments and volcanics related to the Stikinia Terrane are interspersed within the plutonic complex. The northeastern part of the Bella Coola map area is underlain primarily by mafic volcanic and sedimentary rocks of the Jurassic Hazelton Group. These rocks are variably deformed containing both northeast and northwest trending structures.

Between the Hazelton Group of the Stikinia Terrane to the east and the Coast Plutonic Complex with its deformed metasedimentary terrane to the west, is a belt of dominantly mafic rocks. These rocks are probably of volcanic origin and may be part of the Hazelton Group.

The Numas showing consists of discontinuous quartz lenses in a shear zone mineralized with sparse pyrite, chalcopyrite and molybdenite. The shear zone, which strikes 110 degrees and dips steeply to the south, cuts a felsic intrusion which is probably related to a quartz diorite batholith immediately to the east of the showing. Chlorite schist occurs within the shear zone.