Franciscan Complex, unit 1 (Coast Ranges) (CAKJf1;0)

State	California
Name	Franciscan Complex, unit 1 (Coast Ranges)
Geologic age	Jurassic to Cretaceous
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed)Mostly graywacke; commonly contains blueschist-facies metamorphic minerals. Sedimentary > Clastic > Mudstone (Bed)Generally sheared. Commonly forms matrix of melange. Also described as shale and argillite Minor Sedimentary > Chemical > Chert (Bed)Thin-bedded radiolarian chert Incidental Igneous > Plutonic > Gabbroic > GabbroSills, dikes Metamorphic > Metaigneous > SerpentiniteIncludes diapiric intrusions Metamorphic > Metaigneous > Greenstone Metamorphic > AmphiboliteIsolated blocks in melange Sedimentary > Carbonate > Limestone (Bed) Igneous > Volcanic > Felsic-volcanicExtrusive and intrusive keratophyre, quartz keratophyre Metamorphic > SchistIsolated blocks of blueschist in melange Sedimentary > Clastic > Conglomerate (Bed)
Comments	Coast Ranges. Primarily Yolla Bolly, Central, and San Simeon terranes of Silberling et al. (1987). Consists primarily of variably deformed and metamorphosed graywacke, mudstone, and chert.
Stratigraphic units	Franciscan Complex (sedimentary rocks), Dothan Fm., Honda Fm., San Luis Fm., Valentine Spring Fm. (part), Yolla Bolly terrane, Central terrane, San Simeon terrane
References	Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000. Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p. Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Olaf P. Jenkins edition, Los Angeles sheet, scale 1:250,000. Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, Redding sheet, scale 1:250,000. Jennings, C.W., and Burnett, J.L., 1961, Geologic map of California, Olaf P. Jenkins edition, San Francisco sheet, scale 1:250,000. Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, San Jose sheet, scale 1:250,000. Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, San Luis Obispo sheet, scale 1:250,000. Jennings, C.W., and Strand, R.G., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Cruz sheet, scale 1:250,000. Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Maria sheet, scale 1:250,000. Koenig, J.B., 1963, Geologic map of California, Olaf P. Jenkins edition, Santa Rosa sheet, scale 1:250,000. Jennings, C.W., and Strand, R.G., 1960, Geologic map of California, Olaf P. Jenkins edition, Ukiah sheet, scale 1:250,000. Strand, R.G., 1964, Geologic map of California, Olaf P. Jenkins edition, Weed sheet, scale 1:250,000. Wagner, D.L., Bortugno, E.J., and McJunkin, R.D., 1990, Geologic map of the San Francisco-San Jose quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 5A, scale 1:250,000. Wagner, D.L., and Saucedo, G.J., 1987, Geologic map of the Weed quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 4A, scale 1:250,000. Wagner, D.L., and Bortugno, E.J., 1982, Geologic map of the Santa Rosa quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 2A, scale 1:250,000. Fraticelli, L.A., Albers, J.P., Irwin, W.P., and Blake, M.C., Jr., 1987, Geologic map of the Redding 1 X 2 degree quadrangle, Shasta, Tehama, Humboldt, and Trinity Counties, California: U.S. Geological Survey Open-File Report 87-257, scale 1:250,000. https://pubs.er.usgs.gov/publication/ofr87257 Blake, M.C., Jr., Helley, E.J., Jayko, A.S., Jones, D.L., and Ohlin, H.N., 1992, Geologic map of the Willows 1:100,000 quadrangle, California: U.S. Geological Survey Open-File Report 92-271, 42 p., scale 1:100,000. https://pubs.er.usgs.gov/publication/ofr92271 Graymer, R.W., Jones, D.L., and Brabb, E.E., 2002, Geologic map and map database of northeastern San Francisco Bay region, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2403, 28 p., scale 1:100,000. https://pubs.er.usgs.gov/publication/mf2403 Blake, M.C., Jr., Graymer, R.W., and Stamski, R.E., 2002, Geologic map and map database of western Sonoma, northernmost Marin, and southernmost Mendocino Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2402, 43 p., scale 1:100,000. https://pubs.er.usgs.gov/publication/mf2402 Jayko, A.S., Blake, M.C., Jr., McLaughlin, R.J., Ohlin, H.N., Ellen, S.D., and Kelsey, Harvey, 1989, Reconnaissance geologic map of the Covelo 30- by 60-minute quadrangle, northern California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2001, scale 1:100,000. https://pubs.er.usgs.gov/publication/mf2001 Brabb, E.E., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of the Palo Alto 30' x 60' quadrangle, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2332, 30 p., scale 1:100,000. https://pubs.er.usgs.gov/publication/mf2332 Blake, M.C., Jr., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF 2337, 29 p., scale 1:75,000. https://pubs.er.usgs.gov/publication/mf2337 McLaughlin, R.J., Ellen, S.D., Blake, M.C., Jr., Jayko, A.S., Irwin, W.P., Aalto, K.R., Carver, G.A., and Clarke, S.H., Jr., 2000, Geology of the Cape Mendocino, Eureka, Garberville, and southwestern part of the Hayfork 30 x 60 minute quadrangles and adjacent offshore area, northern California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2336, 30 p., scale 1:100,000. https://pubs.er.usgs.gov/publication/mf2336 Silberling, N.J., Jones, D.L., Blake, M.C., Jr., and Howell, D.G., 1987, Lithotectonic terrane map of the western conterminous United States: U.S. Geological Survey Miscellaneous Field Studies Map MF-1874-C, scale 1:2,500,000. https://pubs.er.usgs.gov/publication/mf1874C Graymer, R.W., 2000, Geologic map and map database of the Oakland metropolitan area, Alameda, Contra Costa, and San Francisco Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2342, 29 p., scale 1:50,000. https://pubs.er.usgs.gov/publication/mf2342 Vedder, J.G., Gower, H.D., Clifton, H.E., and Durham, D.L., 1967, Reconnaissance geologic map of the central San Rafael Mountains and vicinity, Santa Barbara County, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-487, scale 1:48,000. https://pubs.er.usgs.gov/publication/i487 Cotton, W.R., 1972, Preliminary geologic map of the Franciscan rocks in the central part of the Diablo Range, Santa Clara and Alameda Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-343, scale 1:62,500. https://pubs.er.usgs.gov/publication/mf343 Blake, M.C., Jr., and Jones, D.L., 1981, The Franciscan Assemblage and related rocks in northern California: a reinterpretation, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 307-328. Page, B.M., 1981, The southern Coast Ranges, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 329-417. Blake, M.C., Jr., Jayko, A.S., McLaughlin, R.J., and Underwood, M.B., 1988, Metamorphic and tectonic evolution of the Franciscan Complex, northern California, in Ernst, W.G., ed., Metamorphism and crustal evolution of the western United States (Rubey Volume 7): Englewood Cliffs, N.J., Prentice-Hall, p. 1035-1060. Blake, M.C., Jr., and others, 1985, C-1 Mendocino triple junction to North American craton: Geological Society of America Centennial Continent/Ocean Transect 12, 30 p., scale 1:500,000. Suppe, John, 1978, Cross section of southern part of northern Coast Ranges and Sacramento Valley, California: Geological Society of America Map and Chart Series, MC-28B, 8 p., scale 1:250,000. Irwin, Porter, and Dennis, M.D., 1978, Geologic structure section across southern Klamath Mountains, Coast Ranges, and seaward to Point Delgada, California: Geological Society of America Map and Chart Series, MC-28D, scale 1:250,000. Page, B.M., Wagner, H.C., McCulloch, D.S., Silver, E.A., and Spotts, J.H., 1978, Geologic cross section of the continental margin off San Luis Obispo, the southern Coast Ranges, and the San Joaquin Valley, California: Geological Society of America Map and Chart Series, MC-28G, 12 p., scale 1:250,000. Ross, D.C., and McCulloch, D.S., 1979, Cross section of the southern Coast Ranges and San Joaquin Valley from offshore Point Sur to Madera, California: Geological Society of America Map and Chart Series, MC-28H, 4 p., scale 1:250,000. Maxwell, J.C., Etter, S.D., Fritz, D.M., Gucwa, P.R., Jordan, M.A., Kleist, J.R., Lehman, D.H., Raney, J.A., and Worrall, D.M., 1981, Geologic cross sections, northern California coast ranges to northern Sierra Nevada, and Lake Pillsbury area to southern Klamath Mountains: Geological Society of America Map and Chart Series, MC-28N, 8 p., scale 1:250,000.
NGMDB product	NGMDB product page for 96750
Counties	Alameda - Colusa - Contra Costa - Del Norte - Fresno - Glenn - Humboldt - Kern - Kings - Lake - Marin - Mendocino - Merced - Monterey - Napa - San Benito - San Francisco - San Joaquin - San Luis Obispo - San Mateo - Santa Barbara - Santa Clara - Solano - Sonoma - Stanislaus - Tehama - Trinity - Yolo

Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.

Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.

Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Olaf P. Jenkins edition, Los Angeles sheet, scale 1:250,000.

Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, Redding sheet, scale 1:250,000.

Jennings, C.W., and Burnett, J.L., 1961, Geologic map of California, Olaf P. Jenkins edition, San Francisco sheet, scale 1:250,000.

Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, San Jose sheet, scale 1:250,000.

Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, San Luis Obispo sheet, scale 1:250,000.

Jennings, C.W., and Strand, R.G., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Cruz sheet, scale 1:250,000.

Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Maria sheet, scale 1:250,000.

Koenig, J.B., 1963, Geologic map of California, Olaf P. Jenkins edition, Santa Rosa sheet, scale 1:250,000.

Jennings, C.W., and Strand, R.G., 1960, Geologic map of California, Olaf P. Jenkins edition, Ukiah sheet, scale 1:250,000.

Strand, R.G., 1964, Geologic map of California, Olaf P. Jenkins edition, Weed sheet, scale 1:250,000.

Wagner, D.L., Bortugno, E.J., and McJunkin, R.D., 1990, Geologic map of the San Francisco-San Jose quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 5A, scale 1:250,000.

Wagner, D.L., and Saucedo, G.J., 1987, Geologic map of the Weed quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 4A, scale 1:250,000.

Wagner, D.L., and Bortugno, E.J., 1982, Geologic map of the Santa Rosa quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 2A, scale 1:250,000.

Fraticelli, L.A., Albers, J.P., Irwin, W.P., and Blake, M.C., Jr., 1987, Geologic map of the Redding 1 X 2 degree quadrangle, Shasta, Tehama, Humboldt, and Trinity Counties, California: U.S. Geological Survey Open-File Report 87-257, scale 1:250,000.

https://pubs.er.usgs.gov/publication/ofr87257

Blake, M.C., Jr., Helley, E.J., Jayko, A.S., Jones, D.L., and Ohlin, H.N., 1992, Geologic map of the Willows 1:100,000 quadrangle, California: U.S. Geological Survey Open-File Report 92-271, 42 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/ofr92271

Graymer, R.W., Jones, D.L., and Brabb, E.E., 2002, Geologic map and map database of northeastern San Francisco Bay region, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2403, 28 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2403

Blake, M.C., Jr., Graymer, R.W., and Stamski, R.E., 2002, Geologic map and map database of western Sonoma, northernmost Marin, and southernmost Mendocino Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2402, 43 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2402

Jayko, A.S., Blake, M.C., Jr., McLaughlin, R.J., Ohlin, H.N., Ellen, S.D., and Kelsey, Harvey, 1989, Reconnaissance geologic map of the Covelo 30- by 60-minute quadrangle, northern California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2001, scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2001

Brabb, E.E., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of the Palo Alto 30' x 60' quadrangle, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2332, 30 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2332

Blake, M.C., Jr., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF 2337, 29 p., scale 1:75,000.

https://pubs.er.usgs.gov/publication/mf2337

McLaughlin, R.J., Ellen, S.D., Blake, M.C., Jr., Jayko, A.S., Irwin, W.P., Aalto, K.R., Carver, G.A., and Clarke, S.H., Jr., 2000, Geology of the Cape Mendocino, Eureka, Garberville, and southwestern part of the Hayfork 30 x 60 minute quadrangles and adjacent offshore area, northern California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2336, 30 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2336

Silberling, N.J., Jones, D.L., Blake, M.C., Jr., and Howell, D.G., 1987, Lithotectonic terrane map of the western conterminous United States: U.S. Geological Survey Miscellaneous Field Studies Map MF-1874-C, scale 1:2,500,000.

https://pubs.er.usgs.gov/publication/mf1874C

Graymer, R.W., 2000, Geologic map and map database of the Oakland metropolitan area, Alameda, Contra Costa, and San Francisco Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2342, 29 p., scale 1:50,000.

https://pubs.er.usgs.gov/publication/mf2342

Vedder, J.G., Gower, H.D., Clifton, H.E., and Durham, D.L., 1967, Reconnaissance geologic map of the central San Rafael Mountains and vicinity, Santa Barbara County, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-487, scale 1:48,000.

https://pubs.er.usgs.gov/publication/i487

Cotton, W.R., 1972, Preliminary geologic map of the Franciscan rocks in the central part of the Diablo Range, Santa Clara and Alameda Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-343, scale 1:62,500.

https://pubs.er.usgs.gov/publication/mf343

Blake, M.C., Jr., and Jones, D.L., 1981, The Franciscan Assemblage and related rocks in northern California: a reinterpretation, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 307-328.

Page, B.M., 1981, The southern Coast Ranges, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 329-417.

Blake, M.C., Jr., Jayko, A.S., McLaughlin, R.J., and Underwood, M.B., 1988, Metamorphic and tectonic evolution of the Franciscan Complex, northern California, in Ernst, W.G., ed., Metamorphism and crustal evolution of the western United States (Rubey Volume 7): Englewood Cliffs, N.J., Prentice-Hall, p. 1035-1060.

Blake, M.C., Jr., and others, 1985, C-1 Mendocino triple junction to North American craton: Geological Society of America Centennial Continent/Ocean Transect 12, 30 p., scale 1:500,000.

Suppe, John, 1978, Cross section of southern part of northern Coast Ranges and Sacramento Valley, California: Geological Society of America Map and Chart Series, MC-28B, 8 p., scale 1:250,000.

Irwin, Porter, and Dennis, M.D., 1978, Geologic structure section across southern Klamath Mountains, Coast Ranges, and seaward to Point Delgada, California: Geological Society of America Map and Chart Series, MC-28D, scale 1:250,000.

Page, B.M., Wagner, H.C., McCulloch, D.S., Silver, E.A., and Spotts, J.H., 1978, Geologic cross section of the continental margin off San Luis Obispo, the southern Coast Ranges, and the San Joaquin Valley, California: Geological Society of America Map and Chart Series, MC-28G, 12 p., scale 1:250,000.

Ross, D.C., and McCulloch, D.S., 1979, Cross section of the southern Coast Ranges and San Joaquin Valley from offshore Point Sur to Madera, California: Geological Society of America Map and Chart Series, MC-28H, 4 p., scale 1:250,000.

Maxwell, J.C., Etter, S.D., Fritz, D.M., Gucwa, P.R., Jordan, M.A., Kleist, J.R., Lehman, D.H., Raney, J.A., and Worrall, D.M., 1981, Geologic cross sections, northern California coast ranges to northern Sierra Nevada, and Lake Pillsbury area to southern Klamath Mountains: Geological Society of America Map and Chart Series, MC-28N, 8 p., scale 1:250,000.