Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.
Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.
Extensive marine and nonmarine sand deposits, generally near the coast or desert playas
Upper Cretaceous sandstone, shale, and conglomerate
Franciscan complex: Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, limestone, and conglomerate. Includes Franciscan melange, except where separated--see KJfm.
Sandstone, shale, conglomerate, and fanglomerate; in part Pliocene and Oligocene.
Older alluvium, lake, playa, and terrace deposits.
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Melange of fragmented and sheared Franciscan complex rocks.
Sandstone, shale, and conglomerate.
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
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.
Sandstone, shale, and conglomerate; mostly well consolidated
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3
Tertiary intrusive rocks; mostly shallow (hypabyssal) plugs and dikes. Includes some Mesozoic rocks.
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.
Granitic and metamorphic rocks, mostly gneiss and other metamorphic rocks injected by granitic rocks. Mesozoic to Precambrian.
Shale, sandstone, conglomerate, and minor limestone; in part Oligocene and Paleocene.
Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Blueschist and semi-schist of Franciscan complex
Lower Cretaceous sandstone, shale, and conglomerate