Upper Paleozoic rocks, undivided

Mostly graywacke, interbedded quartzite and phyllite, greenstone and serpentine, and black shale with minor limestone. Some quartz-mica schist in Bald Knob area of Ferry County. Schist, gneiss, and amphibolite in other parts of Ferry County. Some rocks of lower Paleozoic age, possibly Precambrian, and Mesozoic may be included.
State Washington
Name Upper Paleozoic rocks, undivided
Geologic age Ordovician
Lithologic constituents
Sedimentary > Clastic > Sandstone > Graywacke (Bed)
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Metamorphic > GneissGranitic orthogneiss and mafic gneiss.
Sedimentary > Clastic > Sandstone > Arenite (Bed)Often undivided from graywacke in literature; rank is estimated from descriptions.
Metamorphic > Schist
Metamorphic > MetasedimentaryIncludes meta-argillite, metaconglomerate, metalimestone, metawacke, and slate.
Sedimentary > Clastic > Conglomerate (Bed)
Metamorphic > Metaigneous > SerpentiniteLocally replaced greenstone.
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Chemical > Chert (Bed)
Metamorphic > Metaigneous > Greenstone
Metamorphic > Metasedimentary > Metaclastic > Argillite
Comments Stoffel and others, 1991, report that while the term "Mission argillite" was once widely used, it has since been abandoned. Outcrops in the northern half of Ferry County make up part of the Tenas Mary Creek and Kettle metamorphic core complexes (see also WAPZl).
Stratigraphic units Colville Quartzite; Covada group; Mission argillite

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.

Stoffel, K.L., 1990, Geologic Map of the Republic 1:100,000 Quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-10, 62 p, 1 pl.

Joseph, N.L., 1990a, Geologic Map of the Colville 1:100,000 Quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-13, 78 p., 1 pl.

Joseph, N.L., 1990b, Geologic Map of the Nespelem 1:100,000 Quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-16, 47 p., 1 pl.

Yates, R.G., 1971, Geologic Map of the Northport Quadrangle, Washington: U. S. Geological Survey Miscellaneous Geologic Investigations Map I-603, scale 1:31,680.

NGMDB product
Counties Ferry - Okanogan - Stevens