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Precambrian rocks, undivided

Magnesite-bearing Stensgar dolomite; southwestern Stevens County.
State Washington
Name Precambrian rocks, undivided
Geologic age Middle to Late Proterozoic
Comments Interbedded with overlying Deer Trail argillite (see unit WAPC).
Primary rock type dolostone (dolomite)
Secondary rock type metasedimentary rock
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)Also considered a limestone which contains magnesium carbonate (Stevens, 1920).
Incidental
Metamorphic > MetasedimentaryIncludes any metadolomite, quartzite, meta-argillite, metachert, and metaconglomerate.
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.
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.
Counties Stevens