The Snowdrop workings lie within greenstone and altered green- stone of the Lower Jurassic Elise Formation, Rossland Group and in dark grey siltstone and sandstone of the Pennsylvanian and possibly Permian Mount Roberts Formation. The veins lie adjacent to the northern contact of a body of serpentinite of probable Permian age which trends easterly and dips steeply to the south. The contact is an east trending fault which is terminated by the Middle Eocene Marron Formation on the west and the Jumbo fault on the east.

On the Snowdrop property, amygdules and small lenticular incl- usions of limestone in the greenstone indicate that these rocks are in part, flows. In the upper workings of the Snowdrop mine, the veins are quartz-carbonate filled fissures which trend northeast and dip 50 degrees to the southeast. Other individual veins are not continuous bodies of quartz but rather are tight fractures which contain lenses which pinch and swell and change their attitudes. Widths range from a few centimetres to 0.5 metres in a few places as much as 2.0 metres. Mineralization consists of pockets which host free gold, often in particles visible to the naked eye. Although, occasional concentrations do occur, sulphides are not common in the veins. These sulphides include pyrite, chalcopyrite, and galena. Blades of marcasite were found included in chalcopyrite in ore from the Snowdrop property. Pyrite is also quite widely disseminated in small amounts throughout the wallrock. The only other gangue mineral in addition to the quartz is ankeritic carbonate, which occurs in irregular areas in the vein and occasionally as veinlets in the surrounding rocks. Hematite occurs on the Snowdrop property and is mostly represented as pseudomorphs of magnetite. Also, hematite included in chalcopyrite is completely replaced.

The veins were mined in 1931, 1932, 1937 and 1955 to 1957. Six tonnes of ore were shipped and 6843 grams gold and 16640 grams silver were recovered.