Sandstone, shale and minor conglomerate in coastal belt of northwestern California; included by some in Franciscan Complex. Previously considered Cretaceous, but now known to contain early Tertiary microfossils in places.
Blueschist and semi-schist of Franciscan complex
Sandstone, shale, and conglomerate; mostly well consolidated
Sandstone, siltstone, shale, and conglomerate; in part Pleistocene and Miocene.
Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.
Franciscan complex: Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, limestone, and conglomerate. Includes Franciscan melange, except where separated--see KJfm.
Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 2
Undivided Paleozoic metasedimentary rocks. Includes slate, sandstone, shale, chert, conglomerate, limestone, dolomite, marble, phyllite, schist, hornfels, and quartzite
Extensive marine and nonmarine sand deposits, generally near the coast or desert playas
Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.
Undivided Mesozoic volcanic and metavolcanic rocks. Andesite and rhyolite flow rocks, greenstone, volcanic breccia and other pyroclastic rocks; in part strongly metamorphosed. Includes volcanic rocks of Franciscan Complex: basaltic pillow lava, diabase, greenstone, and minor pyroclastic rocks
Tertiary intrusive rocks; mostly shallow (hypabyssal) plugs and dikes. Includes some Mesozoic rocks.