The Revelstoke flagstone quarry is situated within the Precambrian-Paleozoic(?) Monashee Complex. This small, one-man enterprise was started in 1957 and operates in the summers only. Drilling and blasting is done to loosen the slabs, followed by hand-splitting. The stone is a light grey muscovite mica schist which is supplied to building material companies in British Columbia and Alberta. Production averages about 200 tonnes per year (Z.D. Hora, personal communication, 1993).