Precambrian rocks, undivided

Magnesite-bearing Stensgar dolomite; southwestern Stevens County.
State Washington
Name Precambrian rocks, undivided
Geologic age Middle to Late Proterozoic
Lithologic constituents
Sedimentary > Carbonate > Dolostone (Bed)Also considered a limestone which contains magnesium carbonate (Stevens, 1920).
Metamorphic > MetasedimentaryIncludes any metadolomite, quartzite, meta-argillite, metachert, and metaconglomerate.
Comments Interbedded with overlying Deer Trail argillite (see unit WAPC).
Stratigraphic units Deer Trail Group: Stensgar Dolomite

Huntting, M.T., Bennett, W.A.G., Livingston, V.E.Jr., and Moen, W.S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.

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.

NGMDB product
Counties Stevens