The Duncan Lake Quartzite quarry is located on the east shore of Duncan Lake, between Little Glacier and Howser creeks, in the Slocan Mining Division.

Regionally, the area lies within the Kootenay Arc near the margins of the Ancestral North American Terrane. The Kootenay Arc is a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Eocambrian Hamill Group, the Lower Cambrian Badshot Formation, and the lower Paleozoic Lardeau Group. The volcano-sedimentary sequence is intruded by numerous Ordovician, Devonian and Mississippian granitoid plutons. The rocks have undergone regional metamorphism to middle or upper greenschist facies (Paper 1993-1).

The quarry is within micaceous quartzite of the Lower Cambrian Hamill Group, near the axis of an overturned syncline (Geological Survey of Canada Map 1326A).

In the vicinity of the quarry, the Hamill Group is characterized by quartz and feldspar grit and pebble conglomerate overlain by clean, crossbedded quartzite. The quartzite of the Hamill Group is overlain by the Mohican Formation, a calcareous schist which is transitional with the overlying marble of the Badshot Formation (Paper 1993-1).

Several truck loads of quartzite were quarried by B. Logan in 1972 for use as facing stone but no figures are available.