Cambrian quartzite (WACAq;0)

Gritstone with conglomerate in lower part and gray, white, and buff platy quartzite in upper part grading upward into phyllite; northern Pend Oreille County. Light-gray, platy, medium- to thick-bedded quartzite in upper part and darker impure quartzite with some interbedded argillite or phyllite in lower part; north-central Stevens County. White, gray, and reddish, medium- to thick-bedded quartzite in lower part and thin interbeds of quartzite and argillite in upper part, with very low Lower Cambrian fossils (Nevadia, Hyolthellus, and three genera of brachipods) near base of upper part; Addy district of central Stevens County. Thick argillite and thin quartzite units form an uppermost zone in southwestern Stevens County. Conspicuous phyllite units near base in north-central Lincoln County.

State	Washington
Name	Cambrian quartzite
Geologic age	Cambrian
Original map label	Cq
Primary rock type	quartzite
Secondary rock type	sandstone
Other rock types	conglomerate; phyllite; schist; slate; argillite
Lithologic constituents	Major Metamorphic > Quartzite Minor Sedimentary > Clastic > Sandstone (Bed)Refered to as gritstone on original map; present within Gypsy Quartzite only. Incidental Metamorphic > Argillite Metamorphic > Slate Metamorphic > Schist Metamorphic > Phyllite Sedimentary > Clastic > Conglomerate (Bed)
Map references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.
Unit references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000. Park, C. F. Jr., and Cannon, R. S. Jr., 1943, Geology and Ore Deposits of the Metaline Quadrangle, Washington: U. S. Geological Survey Professional Paper 202, 81 p. [http://pubs.er.usgs.gov/publication/pp202] Weaver, C. E., 1920, The Mineral Resources of Stevens County: Washington Geological Society Bulletin No. 20, 350 p. Stoffel, K. L., Joseph, N. L., Waggoner, S. Z., Gulick, C. W., Korosec, M. A., Bunning, B. B., 1991, Geologic Map of Washington--Northeast Quadrant: Washington Division of Geology and Earth Resources Geologic Map, GM-39, scale 1:250,000.
Geographic coverage	Lincoln - Pend Oreille - Stevens