|Name||Pre-Carboniferous intrusive rocks|
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)Includes meta-quartz diorite.
Igneous > Plutonic > Granitic > Tonalite (Pluton)Includes trondhjemite and meta-tonalite. Possibly major in rank.
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
Sedimentary > Clastic (Bed)May include sandstone, siltstone, conglomerate, breccia, and tuff of Fidalgo Complex.
Metamorphic > Metasedimentary > Metaclastic > ArgilliteAssociated with Fidalgo Complex.
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)
Igneous > Plutonic > Dioritic > Diorite
Sedimentary > Chemical > ChertAssociated with Fidalgo Complex.
Igneous > Plutonic > Ultramafic > Pyroxenite
Metamorphic > Amphibolite
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow)
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow)
Metamorphic > Gneiss (Greenschist)Includes tonalite gneiss and flaser gneiss associated with the Marblemount quartz diorite and orthogneiss of Turtleback and Yellow Aster Complexes. Possibly minor in rank.
|Comments||Meta-quartz diorite of Marblemount is greenschist facies (Misch, 1977). Turtleback and Yellow Aster Complexes are metamorphosed to greenschist and amphibolite facies (Dragovich and others, 2002).|
|Stratigraphic units||Marblemount quartz diorite; Turtleback Complex (in part); Fidalgo Complex (in part); Yellow Aster Complex (in part)|
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.
Brandon, M.T., 1989, Geology of the San Juan-Cascade Nappes, northwestern Cascade Range and San Juan Islands, in Joseph, N. L. (Ed.), Geologic Guidebook for Washington and Adjacent Areas: prepared for the 85th Annual Meeting of the Cordilleran Section, Geological Society of America, May 8-11, 1989, Spokane, Washington: Washington Division of Geology and Earth Resource Infomation Circular 86, p. 137-162.
Misch, P., 1979, Geologic Map of the Marblemount Quadrangle, Washington: Washington Division of Geology and Earth Resources Geologic Map GM-23, scale 1:48,000.
Misch, P., 1977, Bedrock Geology of the North Cascades, in Brown, E. H. and Ellis, R. C. (eds.), Geological Excursions in the Pacific Northwest, Geological Society of America 1977 Annual Meeting, Seattle: Western Washington University, p. 1-62.
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.
|Counties||Chelan - San Juan - Skagit|