Lower Cretaceous marine rocks (CAKl;0)

State	California
Name	Lower Cretaceous marine rocks
Geologic age	Early Cretaceous
Original map label	Kl
Comments	Coast Ranges. Middle part of Great Valley Sequence. Thick, extensive sequences of shale, siltstone, sandstone, and conglomerate. Included in undivided Lower Cretaceous and Upper Jurassic rocks on many recent maps
Primary rock type	mudstone
Secondary rock type	sandstone
Other rock types	conglomerate
Lithologic constituents
Map references	Jennings, C.W., Strand, R.G., and Rogers, T.H., 1977, Geologic map of California: California Division of Mines and Geology, scale 1:750,000.
Unit references	Jennings, C.W., Strand, R.G., and Rogers, T.H., 1977, Geologic map of California: California Division of Mines and Geology, 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. Smith, A.R., 1965, Geologic map of California, Olaf P. Jenkins edition, Bakersfield sheet, scale 1:250,000. 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. 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. Saucedo, G.J., and Wagner, D.L., 1992, Geologic map of the Chico quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 7A, 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 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. [http://pubs.er.usgs.gov/publication/ofr87257] Yerkes, R.F., and Campbell, R.H., 1997, Preliminary geologic map of the west half, Los Angeles 60' x 30' quadrangle: U.S. Geological Survey Open-File Report 97-483, scale 1:100,000. [http://pubs.er.usgs.gov/publication/ofr97483] Tennyson, M.E., 1992, Preliminary geologic map of the Santa Maria 30' x 60' quadrangle, California: U.S. Geological Survey Open-File Report 92-189, 9 p., scale 1:100,000. [http://pubs.er.usgs.gov/publication/ofr92187] 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. [http://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. [http://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. [http://pubs.er.usgs.gov/publication/mf2402] 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. [http://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. [http://pubs.er.usgs.gov/publication/mf2337] Blake, M.C., Jr., Harwood, D.S., Helley, E.J., Irwin, W.P., Jayko, A.S., and Jones, D.L., 1999, Geologic map of the Red Bluff 30' x 60' quadrangle, California: U.S. Geological Survey Geologic Investigations Series Map I-2542, 15 p., scale 1:100,000. [http://pubs.er.usgs.gov/publication/i2542] Morton, D.M., 1999, Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, southern California: U.S. Geological Survey Open-File Report 99-172, scale 1:100,000. [http://pubs.er.usgs.gov/publication/ofr99172] Dibblee, T.W., Jr., 1973, Regional geologic map of San Andreas and related faults in Carrizo Plain, Temblor, Caliente, and La Panza Ranges and vicinity, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-757, scale 1:125,000. [http://pubs.er.usgs.gov/publication/i757] 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. [http://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. [http://pubs.er.usgs.gov/publication/i487] Vedder, J.G., Dibblee, T.W., Jr., and Brown, R.D., Jr., 1973, Geologic map of the upper Mono Creek-Pine Mountain area, California, showing rock units and structures offset by the Big Pine fault: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-752, scale 1:48,000. [http://pubs.er.usgs.gov/publication/i752] Ingersoll, R.V., Rich, E.I., and Dickinson, W.R., 1977, Field guide; Great Valley Sequence, Sacramento Valley; [Field trip no. 8]: Geological Society of America, Cordilleran Section, Guidebook for Field Trips, 73rd Annual Meeting, Sacramento, CA, April 5-7, 1977, 72 p. Hart, E.W., 1966, Mines and mineral resources of Monterey County, California: California Division of Mines and Geology, County Report 5, 142 p., scale 1:250,000.
Geographic coverage	Colusa - Contra Costa - Fresno - Glenn - Kern - Kings - Lake - Mendocino - Merced - Monterey - Napa - San Benito - San Luis Obispo - Santa Barbara - Shasta - Solano - Sonoma - Stanislaus - Tehama - Trinity - Yolo