The region in which the Tet showing occurs is within the Inter- montane Belt, underlain dominantly by Lower to Middle Jurassic volcanic and sedimentary rocks of the Hazelton Group. These as- semblages 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 Tet showing consists of disseminated pyrite with chalcopyrite and molybdenite in an area underlain by Hazelton Group mafic volcanic rocks intruded by granodiorite and alaskite of probable Cretaceous age.

The area has been historically explored in conjunction with the nearby Exo (MINFILE 093F 017) occurrence and complete regional and property history can be found there.