Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite
Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.
Older alluvium, lake, playa, and terrace deposits.
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 pre-Cenozoic metasedimentary and metavolcanic rocks of great variety. Mostly slate, quartzite, hornfels, chert, phyllite, mylonite, schist, gneiss, and minor marble.
Glacial till and moraines. Found at high elevations mostly in the Sierra Nevada and Klamath Mountains.
Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks
Granitic and metamorphic rocks, mostly gneiss and other metamorphic rocks injected by granitic rocks. Mesozoic to Precambrian.
Tertiary volcanic flow rocks; minor pyroclastic deposits.
Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene.
Sandstone, shale, and conglomerate.
Gabbro and dark dioritic rocks; chiefly Mesozoic
Undivided pre-Cenozoic metavolcanic rocks. Includes latite, dacite, tuff, and greenstone; commonly schistose.
Undivided Tertiary sandstone, shale, conglomerate, breccia, and ancient lake deposits.
Shale, sandstone, conglomerate, limestone, dolomite, chert, hornfels, marble, quartzite; in part pyroclastic rocks
Recent (Holocene) volcanic flow rocks; minor pyroclastic deposits; in part Pleistocene.