Lower Jurassic Hazelton Group volcanics of the Telkwa Formation are comprised of green and purple andesitic flows, tuffs and breccia. The rocks are highly fractured with chloritic alteration and host disseminated pyrite. The volcanics are intruded by an Eocene Nanika Intrusion, locally known as the Howson batholith, comprised mainly of medium-grained granodiorite. Small stocks and dikes of biotite-feldspar porphyry and quartz porphyry intrude the volcanics along the eastern margin of the contact with the granodiorite.

The intrusive granodiorite hosts minor disseminated pyrite and chalcopyrite. The quartz porphyry dikes crosscut the granodiorite and volcanic flows. They are light colored and are intensely sericitized and host minor disseminated magnetite. The biotite feldspar porphyry dikes crosscut both the granodiorite and the volcanics. They host secondary biotite and are propylitic with widespread chlorite and epidote. A dioritic dike, 30 to 60 metres wide, trending north-south crosscuts the granodiorite and is very magnetic hosting disseminated magnetite.

Copper mineralization is indicated where andesite and andesite porphyry dikes intrude granodiorite (Map No.1, Assessment Report 2413).

See Limonite (093L 323) for details of the area work history including the 1969 and 1979 work done on the Allie claims.