A dolomite lens in altered metasediments and volcanics of the Carboniferous or Permian Knob Hill Group outcrops over a 100 by 100 metre area along the top of a knoll on the southeast portion of Lot 446S, 4.5 kilometres south-southeast of the community of Rock Creek. The lens is embedded largely in hornblende gneiss (amphibolite). An irregular band of talc-chlorite schist lies along the hanging wall contact. Bedding strikes 157 to 180 degrees and dips 40 to 80 degrees east. A schistosity strikes 150 degrees and dips 30 to 50 degrees west.

The lens contains massive, fine to very fine-grained , white dolomite with scattered grains, patches and veinlets of quartz and a trace of talc. A 2 to 10 metre thick band of gneiss lies within the deposit. Two samples of crushed dolomite taken from a stockpile averaged 30.73 per cent CaO, 18.16 per cent MgO, 6.55 per cent insolubles, 0.32 per cent R2O3, 0.135 per cent Fe2O3, 0.01 per cent MnO, 0.0025 per cent P2O5, 0.015 per cent SO3 and 44.04 per cent ignition loss (Geology, Exploration and Mining in British Columbia 1971, page 456). A sample of dolomite quarried in 1987 contained 30.90 per cent CaO, 19.30 per cent MgO, 5.90 per cent SiO2, 0.26 per cent Al2O3, 0.13 per cent Fe2O3, 0.02 per cent MnO, 0.05 per cent P2O5, 0.02 per cent TiO2, 0.10 per cent K2O, 0.02 per cent Na2O and 41 per cent ignition loss (P. Chaput, personal communication, 1989). In 1972, the deposit was estimated to contain 15.4 million tonnes of proven (measured geological) reserves and 9.0 million tonnes of probable (indicated reserves) (Financial Post Review of Mines 1972, page 214; Open File 1992-1).

The property was first operated on an intermittent basis by New Dolomite Mines Ltd. between 1972 and 1977. Dolowhite Mines Ltd. continued quarrying dolomite from 1978 to 1982. Mighty White Dolomite Ltd. currently operates the quarry, producing crushed dolomite for agricultural, landscaping and decorative purposes. Between 1972 and 1988, 60,000 tonnes of dolomite were quarried.