|Name||Tertiary-Cretaceous Coastal Belt Rocks|
|Geologic age||Late Cretaceous to Pliocene|
Sedimentary > Clastic > Mudstone (Bed)Penetratively sheared; commonly forms matrix of melange enclosing other rocks of unit
Sedimentary > Clastic > Sandstone (Bed)Feldspathic to arkosic. Commonly cut by laumontite veins; commonly contains fine-grained prehnite and pumpellyite. Ranges from partially disrupted to melange
Sedimentary > Clastic > Conglomerate (Bed)
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, Pyroclastic-tuff, Dike or sill)Commonly forms blocks in melange
Sedimentary > Chemical > Chert (Bed)Radiolarian chert
Metamorphic > Schist (Blueschist)Forms blocks in melange locally along eastern boundaries of unit
Sedimentary > Carbonate > Limestone (Lens)Pelagic limestone interbedded with basalt
|Comments||Comprises Coastal terrane and most of King Range terrane (Franciscan Complex) in northwestern California. These units contain the youngest rocks known in the Franciscan Complex. Penetratively sheared and structurally disrupted; includes melange|
|Stratigraphic units||Coastal Belt of Franciscan Complex (part); Coastal terrane; King Range terrane (part)|
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.
Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, Redding 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.
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.
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.
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.
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.
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.
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.
McLaughlin, R.J., Sliter, W.V., Frederiksen, N.O., Harbert, W.P., and McCulloch, D.S., 1994, Plate motions recorded in tectonostratigraphic terranes of the Franciscan Complex and evolution of the Menocino triple junction, northwestern California: U.S. Geological Survey Bulletin 1997, 60 p.
|Counties||Humboldt - Mendocino - Sonoma|