Geologic units in Kings county, California

Quaternary alluvium and marine deposits (Pleistocene to Holocene) at surface, covers 81 % of this area

Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.

Pliocene marine rocks (Miocene to Pleistocene) at surface, covers 8 % of this area

Sandstone, siltstone, shale, and conglomerate; in part Pleistocene and Miocene.

Plio-Pleistocene and Pliocene loosely consolidated deposits (Miocene to Pleistocene) at surface, covers 3 % of this area

Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.

Upper Cretaceous marine rocks, unit 1 (Upper Great Valley Sequence) (Late Cretaceous) at surface, covers 3 % of this area

Upper Cretaceous sandstone, shale, and conglomerate

Older Quaternary alluvium and marine deposits (Pleistocene) at surface, covers 3 % of this area

Older alluvium, lake, playa, and terrace deposits.

Miocene marine rocks (Oligocene to Pliocene) at surface, covers 1 % of this area

Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.

Lower Cretaceous marine rocks (Early Cretaceous) at surface, covers 0.6 % of this area

Lower Cretaceous sandstone, shale, and conglomerate

Eocene marine rocks (Paleocene to Oligocene) at surface, covers 0.5 % of this area

Shale, sandstone, conglomerate, and minor limestone; in part Oligocene and Paleocene.

Franciscan Complex, unit 1 (Coast Ranges) (Jurassic to Cretaceous) at surface, covers 0.4 % of this area

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, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains) (Middle to Late Jurassic) at surface, covers 0.3 % of this area

Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3