The Lemar showing area is underlain by northwest striking, vertically dipping Cambrian to Devonian Lardeau Group metasediments flanked by younger sediments of the Upper Mississippian to Permian Milford Formation. Black phyllites of the Lardeau Group are the predominant lithology.

Minor quartz veins with pyrite and molybdenite crosscut a phyllite unit near the contact with gabbro and diabase. A syenite dike occurs close by. Quartz vein material with coarse pyrite and trace galena and molybdenite is also found in black phyllite talus near the headwaters of the north fork of Fullmer Creek about 1000 metres southeast of the Lemar showing.

In May 1979 the Lemar property claims were optioned by AMAX of Canada Ltd. from JOA Resources Ltd. AMAX conducted geological mapping and soil and stream sediment sampling during the period June to August, 1979.