Franciscan complex: Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, limestone, and conglomerate. Includes Franciscan melange, except where separated--see KJfm.
Blueschist and semi-schist of Franciscan complex
Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene.
Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3
Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.
Melange of fragmented and sheared Franciscan complex 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.
Lower Cretaceous sandstone, shale, and conglomerate
Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.
Upper Cretaceous sandstone, shale, and conglomerate
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
Older alluvium, lake, playa, and terrace deposits.
Recent (Holocene) volcanic flow rocks; minor pyroclastic deposits; in part Pleistocene.
Sandstone, shale, and conglomerate; mostly well consolidated
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Shale, sandstone, conglomerate, and minor limestone; in part Oligocene and Paleocene.
Tertiary pyroclastic and volcanic mudflow deposits.