Lower Cretaceous sandstone, shale, and conglomerate
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3
Tertiary pyroclastic and volcanic mudflow deposits.
Upper Cretaceous sandstone, shale, and conglomerate
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.
Franciscan complex: Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, limestone, and conglomerate. Includes Franciscan melange, except where separated--see KJfm.
Melange of fragmented and sheared Franciscan complex rocks.
Shale, sandstone, conglomerate, and minor limestone; in part Oligocene and Paleocene.
Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene.
Selected large landslides, such as Blackhawk slide on north side of San Gabriel Mountains; early to late Quaternary.
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
Undivided Cretaceous sandstone, shale, and conglomerate; minor nonmarine rocks in Peninsular Ranges