|Name||Jurassic marine rocks, unit 4 (Peninsular Ranges and Western Transverse Ranges)|
|Geologic age||Paleozoic(?) to Late Jurassic|
Metamorphic > Metasedimentary > Metaclastic > Argillite
Sedimentary > Clastic > Sandstone > Graywacke (Bed)Lithic graywacke
Metamorphic > Metasedimentary > Metaclastic > QuartziteFeldspathic to arkosic quartzite
Metamorphic > SchistGradational with phyllite
Metamorphic > Metasedimentary > Metaclastic > PhylliteGradational with schist
Igneous > Volcanic > Ultramafic
Sedimentary > Clastic > Conglomerate (Bed)Commonly metamorphosed
Metamorphic > AmphiboliteThin lenses, possibly metamorphosed sills
Sedimentary > Chemical > ChertGenerally metamorphosed
Sedimentary > Carbonate > Limestone (Bed)Rarely fossiliferous
Metamorphic > GneissCommonly derived from impure quartzite
Metamorphic > Metasedimentary > Metacarbonate > Marble
|Comments||Southwestern California, Peninsular Ranges. Primarily fine-grained pelitic rocks and graywacke, variably metamorphosed. May include some rocks of Paleozoic age|
|Stratigraphic units||Bedford Canyon Fm., Santa Monica Slate, French Valley Fm.|
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, San Diego-El Centro sheet, scale 1:250,000.
Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, Santa Ana sheet, scale 1:250,000.
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.
Criscione, J.J., Davis, T.E., and Ehlig, P., 1978, The age of sedimentation/diagenesis for the Bedford Canyon Formation and the Santa Monica Formation of southern California: a Rb/Sr evaluation, in Howell, D.G., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium 2, p. 385-396.
Weber, F.H., Jr., 1963, Geology and mineral resources of San Diego County, California: California Division of Mines and Geology, County Report 3, 309 p., scale 1:125,000.
Gastil, Gordon, Morgan, George, and Krummenacher, Daniel, 1981, The tectonic history of peninsular California and adjacent Mexico, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 284-306.
Schwarcz, H.P., 1969, Pre-Cretaceous sedimentation and metamorphism in the Winchester area, northern Peninsular Ranges, California: Geological Society of America Special Paper 100, 63 p.
|Counties||Los Angeles - Orange - Riverside - San Diego|