The region in which the Nat showing occurs is within the Intermontane Belt, underlain dominantly by Lower to Middle Jurassic volcanic and sedimentary rocks of the Hazelton Group. These assemblages are overlain by the Upper Cretaceous to Lower Tertiary Ootsa Lake Group and Miocene plateau basalt. Intruding Lower Jurassic rocks of the Hazelton Group in the northeastern part of the map sheet is a belt of granodiorite, diorite and quartz diorite plutons of the Lower Jurassic Topley intrusive suite. Felsic plutons of probable Cretaceous age intrude both Lower and Middle Jurassic Hazelton strata.

The Nat showing consists of chalcopyrite and molybdenite in volcanic rocks of the lower part of the Hazelton Group and in a granite pluton of probable Cretaceous age which has intruded these rocks.

In 1969, the group was owned by American Smelting and Refining Company. They conducted geological mapping and soil sampling.