Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.
Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part 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.
Sandstone, shale, and conglomerate; mostly well consolidated
Upper Cretaceous sandstone, shale, and conglomerate
Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite
Sandstone, shale, and conglomerate
Extensive marine and nonmarine sand deposits, generally near the coast or desert playas
Older alluvium, lake, playa, and terrace deposits.
Lower Cretaceous sandstone, shale, and conglomerate
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3
Sandstone, shale, and conglomerate; in part Miocene and Eocene.
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, siltstone, shale, and conglomerate; in part Pleistocene and Miocene.
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Sandstone, shale, conglomerate, and fanglomerate; in part Pliocene and Oligocene.
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Tertiary pyroclastic and volcanic mudflow deposits.
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
Melange of fragmented and sheared Franciscan complex rocks.
Shale, sandstone, conglomerate, and minor limestone; in part Oligocene and Paleocene.
Undivided Cretaceous sandstone, shale, and conglomerate; minor nonmarine rocks in Peninsular Ranges
Tertiary intrusive rocks; mostly shallow (hypabyssal) plugs and dikes. Includes some Mesozoic rocks.
Selected large landslides, such as Blackhawk slide on north side of San Gabriel Mountains; early to late Quaternary.
Undivided Tertiary sandstone, shale, conglomerate, breccia, and ancient lake deposits.
Sandstone, shale, and conglomerate; mostly well consolidated
Undivided pre-Cenozoic metasedimentary and metavolcanic rocks of great variety. Mostly slate, quartzite, hornfels, chert, phyllite, mylonite, schist, gneiss, and minor marble.