The geology of the region consists of (?)Hadrynian to Paleozoic Snowshoe Group rocks. The Snowshoe Group is an assemblage of dominantly metasedimentary rocks within the Barkerville Terrane of south-central British Columbia. The metasedimentary rocks consist primarily of marble, quartzite and phyllite. In the Yanks Peak area these rocks comprise the Keithley and Harveys Ridge successions of the Snowshoe Group. Metamorphism of the region varies from chlorite to sillimanite and higher grade.

Mineralization at the Amparo showing consists of streaks of galena and irregular, discontinuous masses of light, buff-coloured scheelite. Mineralization occurs in one or two quartz veins hosted by massive red-brown weathering ankeritic quartzite. The ankerite is presumed to be of hydrothermal origin.

In 1954, the showing was reached by a road from the north end of the second switchback above the abandoned settlement of Snarlberg. A road was bulldozed 366 metres northward to a clearing where the Amparo Mining Company Limited proposed driving a low-level adit beneath the Midas showings. The vein is 30 metres south of the northeast corner of the Midas Extension No. 2 (Lot 4671). The vein strikes 070 degrees east and dips 65 degrees northwest. A 0.6 to 0.9 metre width of unfractured quartz is exposed for a length of about 12 metres.