The And showing area is underlain by fine to medium-grained diorites and monzonites of the Cherry Creek unit of the the Late Triassic-Early Jurassic Iron Mask batholith. Most outcrops are unaltered but show some moderate pervasive to fracture-controlled epidote and chlorite alteration. At the showing, a shaft 4 metres deep exposes K-feldspar and chlorite altered monzonitic to dioritic rocks with minor pyrite, chalcopyrite, chalcocite, malachite and azurite along fractures and as disseminations. In 1977, a 3-metre chip sample across the west wall of the shaft yielded 0.23 per cent copper (Assessment Report 6717). Some chloritic diorite outcrops about 400 metres north of the shaft and are slightly mineralized with pyrite and chalcopyrite. In 1978, Cominco drilled one vertical percussion hole 106 metres in depth to determine the thickness of the Kamloops Group in the area. The hole is located about 1000 metres southwest of the shaft and intersected Kamloops Group basalt and sediments in the upper half and Nicola Group andesitic tuffs in the lower half. A few grains of pyrite and chalcopyrite were noted in the Nicola rocks.

In 1966, Fidelity Mining Investments Ltd. conducted a 21 kilometre induced polarization survey over the Pinnacle claim group which also covered the Joker (092INE015) and Grey Mask (092INE016) showings. In 1968, Pinnacle Mines Limited took 1785 soil samples over the A, C, Cle and Pin claims which covered the And showing, Grey Mask (092INE016), Joker (092INE015) and Phil (092INE125) showings. In 1972, geological mapping, soil sampling and 15.9 kilometres of ground magnetometer survey was undertaken on the large holding of JD claims on behalf of Flagstone Mines Ltd. The JD claims cover the Phil, Joker, Grey Mask and And showings. The Lark claims were staked in 1977 by Cominco Ltd. and in that year they conducted a geological and rock sampling program. The Lark claims also cover the Joker showing and Grey Mask showing to the east of the And showing. In 1978, Cominco Ltd. completed 6.5 line kilometres of induced polarization survey and drilled one percussion hole totalling 106 metres over the And and Lark claims.