The historic Jenny Long camp is located south of Mineral Hill within a north trending belt of Upper Triassic intermediate volcanics, volcaniclastics and sediments belonging to the Nicola Group. These greenstones consist of massive, chlorite-epidote altered andesite and basalt, augite porphyry, andesitic flow breccia and tuff, minor interbedded argillite, conglomerate and limestone. Attitudes of tuff horizons and sedimentary bedding suggest that a north plunging axis of a syncline passes through Mineral Hill. Both west and northeast of Stump Lake, the Nicola Group volcanics are intruded by Lower Jurassic granitic batholiths; scattered granodiorite outcrops have been mapped in the vicinity of the camp. Secondary to the north-northeast trending Quilchena and Stump Lake regional faults are numerous smaller faults which form a complex fracture pattern and appear to control alteration and mineralization. Andesitic rocks are bleached, pervasively silicified, pyritic and brecciated. Mineralization occurs in numerous quartz, and less commonly calcite veins which strike generally to the north and dip steeply eastward.

The Raven showing consists of an old shaft and trenches in andesite which expose a quartz vein 10 to 45 centimetres wide. The vein dips 63 degrees east near the surface and flattens with depth. Mineralization consists of pyrite, galena, tetrahedrite and chalcopyrite. Grab samples from a 46 centimetre vein assayed up to 0.68 grams per tonne gold, 69.93 grams per tonne silver, 0.09 per cent lead, 0.31 per cent zinc and 0.04 per cent copper (Assessment Report 5152).