State | Washington |
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Name | Precambrian volcanic rocks |
Geologic age | Late-Proterozoic |
Lithologic constituents |
Major
Metamorphic > Metaigneous > GreenstoneIncludes flows, breccia, tuff, and volcaniclastic rock. Greenstone of Huckleberry Formation has major- and trace-element geochemistry consistant with that of a tholeiitic basalt extruded in a continental rift setting (Waggoner, 1990b).
Incidental
Metamorphic > Schist (Greenschist)
Metamorphic > Gneiss
Metamorphic > Amphibolite
Sedimentary > Clastic > Conglomerate (Bed)
|
Comments | Leola volcanics include minor conglomerate and diamictite in the lower part of the unit (Joseph, 1990a); conglomerate member of Huckleberry Formation is included in unit WAPCc). |
Stratigraphic units | Windermere Group: Huckleberry Formation (in part: volcanic member); Leola Volcanics |
References | 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.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.Campbell, I. and Loofbourow, J.S.Jr., 1962, Geology of the Magnesite Belt of Stevens County Washington, U. S. Geological Survey Bulletin 1142-F, F1-F53 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.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.Waggoner, S.Z., 1990b, Geologic Map of the Chewelah 1:100,000 Quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-14, 63 p., 1 pl. |
NGMDB product | |
Counties | Pend Oreille - Stevens |