The Tuesday claim is underlain by Lower Jurassic Elise Formation (Rossland Group) banded hornfels and areas of augite porphyry. The rocks lie approximately 100 metres south of the southern edge of the Lower Jurassic Rossland monzonite within the zone of thermal metamorphism associated with the intrusion. On the west side of the property, the Middle Eocene Coryell Intrusion comprised of a monzonite to syenite stock intrudes the Rossland Group rocks. In 1983, potassium-argon dating of biotite from the Coryell Intrusions yielded an age of 49.1 to 49.9 million years (Bulletin 74). A widespread heating effect due to the intrusion may have caused a resetting of the potassium-argon ratios in the Rossland monzonite biotite which also gave a Tertiary age. A Uranium/Lead age date of zircon from the Rossland monzonite gave an age of 190 million years (Andrew, K.P.E, personal communication, March 1991).

The ore associated with veins in the vicinity of the Tuesday Crown grant are classified as Transitional-type, which is a gradational mineralogy and metal content between the Main vein-type and the South belt-type (Bulletin 74, pages 37-41; Minister of Mines Annual Report 1949, page 147). A Transitional-type vein is defined as those which host pyrrhotite, chalcopyrite, pyrite, sphalerite, minor galena and are low in silver. However, commodities reported associated with the showings are gold, silver and copper (Bulletin 74 - Mineral Deposit table in pocket).