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.
Melange of fragmented and sheared Franciscan complex rocks.
Undivided Cretaceous sandstone, shale, and conglomerate; minor nonmarine rocks in Peninsular Ranges
Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.
Upper Cretaceous sandstone, shale, and conglomerate
Older alluvium, lake, playa, and terrace deposits.
Franciscan complex: Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, limestone, and conglomerate. Includes Franciscan melange, except where separated--see KJfm.
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.
Extensive marine and nonmarine sand deposits, generally near the coast or desert playas
Sandstone, shale, and conglomerate; mostly well consolidated
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 volcanic flow rocks; minor pyroclastic deposits.