|Name||Pre-Middle Jurassic sedimentary and volcanic rocks|
Metamorphic > Metasedimentary > Metaclastic > Slate
Metamorphic > Metasedimentary > Metaclastic > Argillite
Sedimentary > Clastic > Sandstone > Graywacke (Bed)
Sedimentary > Clastic > Sandstone > Arkose (Bed)
Sedimentary > Chemical > Chert (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Metamorphic > Metasedimentary > Metacarbonate > Marble
|Comments||Includes rocks of both the western and eastern melange belts. The western melange in Washington State is chiefly graywacke, argillite and phyllite whereas the eastern melange is primarily greenstone and chert (Tabor and others, 1988); each appears to be equally represented in this unit; argillite and graywacke are dominant because they are subordinate in the eastern melange as well. Includes "semi-schist" (Tabor and others, 1988).|
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.
Dragovich, J.D., Logan, R.L., Schasse, H.W., Walsh, T.J., Lingley, W.S., Jr., Norman, D.K., Gerstel, W.J., Lapen, T.J., Schuster, J.E., Meyers, K.D., 2002, Geologic Map of Washington-Northwest Quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-50, scale 1:250,000.
Tabor, R.W., Booth, D.B., Vance, J.A., Ford, A.B., Ort, M.H., 1988, Preliminary geologic map of the Sauk River 30 by 60 minute quadrangle, Washington: U. S. Geological Survey Open File Report 88-692, 51 p., 1 pl.
|Counties||King - Snohomish|