Pre-Carboniferous intrusive rocks (WApMg;0)

State	Washington
Name	Pre-Carboniferous intrusive rocks
Geologic age	Paleozoic
Lithologic constituents	Major Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)Includes meta-quartz diorite. Minor Igneous > Plutonic > Granitic > Tonalite (Pluton)Includes trondhjemite and meta-tonalite. Possibly major in rank. Igneous > Plutonic > Gabbroic > Gabbro (Pluton) Incidental 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)
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. 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.
NGMDB product	NGMDB product page for 30777
Counties	Chelan - San Juan - Skagit

State

Washington

Name

Pre-Carboniferous intrusive rocks

Geologic age

Paleozoic

Lithologic constituents

Major

Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)Includes meta-quartz diorite.

Minor

Igneous > Plutonic > Granitic > Tonalite (Pluton)Includes trondhjemite and meta-tonalite. Possibly major in rank.

Igneous > Plutonic > Gabbroic > Gabbro (Pluton)

Incidental

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)

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.

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.

NGMDB product

NGMDB product page for 30777

Counties

Chelan - San Juan - Skagit