The Out 10 occurrence is characterized by scattered mineralization. The area is underlain by basaltic augite porphyry as intrusive or flow and andesite that have been intruded by quartz monzonite, related to Middle to Late Triassic Stikine Plutonic Suite or possibly the Middle Jurassic Three Sisters Plutonic Suite. The andesite, varying from tuffaceous to crystalline, is the main rock type of this assemblage. It contains minor beds of chert and limestone and is frequently dioritized near the quartz monzonite. The andesite is strongly sheared, chloritic and somewhat calcareous. The shears also contain epidote and chlorite.

Quartz and quartz-calcite veining are associated with dominant northeast shears in all rock types. These are found to contain traces of chalcopyrite, magnetite, specularite and pyrite. Traces of galena and sphalerite are also found but appear to be associated only with the basaltic augite porphyry.

Refer to IN 32 (104G 080) for details of exploration work completed on the In, Out and C claims by Hecla Operating Company, from 1971 to 1973 inclusive.