SE

AW

AR

DE

DG

EO

FC

AS

CA

DI A

SU

BD

UC

TI O

NZ

ON

E

MENDOCINO FAULT

ZONE

W.

TAH

OE

FAU

LT

POIN

T

REYES

FAULT

SAN

G

REG

OR

IO

FAULT ZONE

MONTEREYBAY

FAULTZONE

HO

SGR

I

F AU

LT

ZON

E

SA

NTA

LUC

IAB

ANK

F AU

LT

PITAS POINT FAULTVENTUR A F.

OAK RIDGE FAULT

SANTACRUZ

ISLAND FAULTSANTA ROSA IS LAN D FAULT

MALIBU COAST FAULT

SAN

CLEMENTE

FAULT

ZONE

SAN DIEGO

TROUGH FAULT ZONE

ZONE

ROSEC

ANYO

N

FAU

LTZO

NE

NEWPORT - INGLEWOOD FAULT ZONE

SANPEDRO

BASINFAULT

ZONE

SANTACRUZ

- SANTACATALINA

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BANK

CORO

NADO

FAULT

SANTA

YNEZFAULT

SAN

ANDREAS

FAULT

SAN

GABRIEL

FLTZONE

SANTA SUSANA THRUST

PINE FLT.MTN

SIERRA

MADREFLT.

SANTAMONICA F.

SAN

SIMIFLT.

PALOS

VERDES

FAULT

WHITTIERFLT. ZONE

CHINO

FLT.

ELSINORE

FAULT

FAULT

JACINTO

ZONE

SAN

BANNINGFAULT

CREEK

F.

MISSION

ZONE

CASALOMA

FLT.

SAN

ANDREAS

COYOTE

CREEK

FAULT

LA GUNA SALADA

F.

MOUNTAINF.

F.

FAULT

HILLS

SUPERSTITION

IMPERIAL

SUPERSTITION

FAULT

BLUE CUT FAULT

FAULT

MOUNTAINPINTO FAULT

F.

FAULT

FAULT

EMERSON

ANDREASANDREAS

SANBR.

N.SAN

S. BR.

F.

CUCAMONGA F.

FAULT

HELENDALE LENWOOD

CAMPROCK

FAULT

FAULT

FLT.

FLT.

WEST

CALICO

CALICO

PISGAH

MANIX

LUD

LOW

F.

BULLIONFLT.

FLT.

FLT.LAKE

COYOTE

LOCKHART

FAULT

BLACKWATER

GARLOCK

FAULT

ZONE

ZONE

FAU

LT

VALLEY

FAULTZONE

DEATH

SO

PANAMINT

VALLEY

FAULT

WOLF

WHITE

BRE

CK

EN

RI D

GE

FLT.

KERN

CAN

YON

FAULT

FAULT

RINCONADASAN

ANDREAS

BEARVLY.

F.

FAULT

FLT.

CALAVERAS

FAULT

FAU

LT

FAU

LT

ZONE

FAU

LTNEVADA

VALLEY

CREEK FAULT

FURNACE

OW

ENS

SIER

RA

ZONE

F.W

HITE

MTNS

ORTIGALITASARGENT

FAULT

FLT.

HAYWARD

ZONEZONE

FAULT

MTNS

CALAVERAS

BEAR

CONCORD

FLT.

FLT.

RODG

ERS

CREEK

GR

EENVA

LLEYFLT.

HEALDSBURG

FAULT

MELO

NES

FAU

LTZO

NEBEAR

MO

UNTAINS

FAULT

ANDREAS

SAN

F.

FLT.

MOHAW

KVALLEY

ZON

E

FAULT

HONEYLAKE

FAULTMELONES

FAULT

THRUST

RANGE

COAST

LITTLESALM

ONFLT.

SUR

PRISEVA

LLEYFA

ULT

LIKELY

CAYETANO

MAACAM

A

FAU

LT

BARTLETTSPRINGS

FAULT

BLACKM

OU

NTA

INFA

ULTZONE

NORTHERN

DEATH

VALLEY

FAULT

ZONE

GREENVILLEFAULT

5

5

10

15

15

40

101

101

101

101

101

8

80

Bishop

Redding

San Francisco

Eureka

Fresno

Susanville

Ukiah

Bakersfield

Needles

San LuisObispo

El Centro

Nevada City

Sacramento

Monterey

SanBernardino

San Diego

Santa Barbara

Los Angeles

Placerville

Mount Whitney

O R E G O N

M E X I C O

N E V A D A

A

R

I

Z

O

N

A

SaltonSea

BristolLake

RogersLake

ClearLake

LakeTahoe

Clear LakeReservoir

EagleLake

Lake Almanor

GooseLake Upper

Lake

HoneyLake

MonoLake

Merced Rive r

San Joaquin River

Pit River

Tule R iver

Americ

anRi

ver

Feat

her Rive

r

Kaweah River

ShastaRiver

Calavera

s River

KlamathRiver

SanDiego River

Eel River

Susan Riv er

Stanis

laus River

Cosu

mnes Rive

r

Kings R iver

MokelumneRiver

Tuolumne River

Alamo

R

iver

Fresno Riv er

Yuba River

Trin

ityR iv

er

Amargosa

River

Sacrament o

River

Tule Ri ver

White River

Noyo Rive r

Mad River

Owens River

KernRiver

BigR iver

120°0'0"W

115°0'0"W

125°0'0"W

124°0'0"W

123°0'0"W

122°0'0"W

121°0'0"W

119°0'0"W

118°0'0"W

124°0'0"W123°0'0"W 122°0'0"W 121°0'0"W

120°0'0"W

117°0'0"W

117°0'0"W

116°0'0"W

116°0'0"W

115°0'0"W

40°0'0"N

38°0'0"N

36°0'0"N

35°0'0"N

32°0'0"N

42°0'0"N

41°0'0"N

41°0'0"N

40°0'0"N

39°0'0"N

39°0'0"N

37°0'0"N 37°0'0"N

33°0'0"N

32°0'0"N

119°0'0"W

118°0'0"W

34°0'0"N

33°0'0"N

38°0'0"N

36°0'0"N

35°0'0"N

34°0'0"N

125°0'0"W

42°0'0"N

SEAW

AR

DE

DG

EO

F

CASCAD

IASU

BD

UC

TION

ZONEMENDOCINO FAULT

ZONE

W.

TAHO

EFA

ULT

POI N

T

R EYES

FAULT

SAN

G

REG

OR

IO

FAULT ZONE

MONTEREYBAY

FAULTZONE

HOSG

RI

FAU

LT

ZON

E

SA

NTA

LUCIA

BA

NKFA

ULT

PITAS POINT FAULTVENTUR A F.

OAK RIDGE FAULT

SANTACRUZ

ISLAND FAULTSANTA ROSA IS LAN D FA ULT

MALIBU COAST FAULT

SAN

CLEMENTE

FAULT

ZONE

SAN DIEGO

TROUGH FAULT ZONE

ZONE

INGLEWOOD

ROSE

CANYO

NFAULT

NEWPORT

SAN

PEDRO

BA

SIN

FAULTZONE

SANTACRUZ

- SANTACATALINA

RI DGEFAULT ZONE

ZO

NE

BANK

CORO

NADO

FAULT

SANTA

YNEZFAULT

SAN

ANDREAS

FAULT

SAN

GABRIEL

FLTZONE

SANTA SUSANA THRUST

PINE FLT.MTN

SIERRA

MADREFLT.

SANTAMONICA F.

SAN

SIMI FLT.

PALOS

VERDES

FAULT

WHITTIERFLT. ZONE

CHINO

FLT.

ELSINORE

FAULT

FAULT

JACINTO

ZONE

SAN

BANNING

FAULT

CREEK

F.

MISSION

ZONE

CASALOMA

FLT.

SAN

ANDREAS

COYOTE

CREEK

FAULT

LA GUNA SALADA

F.

MOUNTAINF.

F.

FAULT

HILLS

SUPERSTITION

IMPERIAL

SUPERSTITION

FAULT

BLUE CUT FAULT

FAULT

MOUNTAINPINTO FAULT

F.

FAULT

FAULT

EMERSON

ANDREASANDREAS

SANBR.

N.SAN

S. BR.

F.

CUCAMONGA F.

FAULT

HELENDALE LENWOOD

CAMPROCK

FAULT

FAULT

FLT.

FLT.

WEST

CALICO

CALICO

PISGAH

MANIX

LUD

LOW

F.

BULLIONFLT.

FLT.

FLT.LAKE

COYOTE

LOCKHART

FAULT

BLACKWATER

GARLOCK

FAULT

ZONE

ZONE

FAU

LT

VALLEY

FAULTZONE

DEATH

SO

PANAMINT

VALLEY

FAULT

WOLF

WHITE

BRE

CKE

NR

IDG

EFL

T.KE

RNCA

NY

ON

FAULT

FAULT

RINCONADA

SAN

ANDREAS

BEARVLY.

F.

FAULT

FLT.

CALAVERAS

FAULT

FAU

LT

FAU

LT

ZONE

FAU

LTNEVADA

VALLEY

CREEKFAULT

FURNACE

OW

ENS

SIER

RA

ZONE

F.W

HITE

MTNS

ORTIGALITASARGENT

FAULT

FLT.

HAYWARD

ZONEZONE

FAULT

MTNS

CALAVERAS

BEAR

CONCORD

FLT.

FLT.

RODG

ERSCREEK

GR

EENVA

LLEYFLT.

HEALDSBURG

FAULT

MELO

NES

FAU

LTZO

NEBEAR

MO

UNTAINS

FAU

LT

AND

REAS

SAN

F.

FLT.

MOHAW

KVALLEY

ZON

E

FAULT

HONEYLAKE

FAULTMELONES

FAULT

THRUST

RANGE

COAST

LITTLESALM

ONFLT.

SUR

PRISEVA

LLEYFA

ULTLIKELY

CAYETANO

MAACAM

A

FAU

LT

BARTLETTSPRINGS

FAULT

BLACKM

OU

NTA

INFA

ULTZONE

NORTHERN

DEATH

VALLEY

FAULT

Z ONE

GREENVILLEFAULT

5

5

10

15

15

40

101

101

101

101

101

8

80

Bishop

Redding

San Francisco

Eureka

Fresno

Susanville

Ukiah

Bakersfield

Needles

San LuisObispo

El Centro

Nevada City

Sacramento

Monterey

SanBernardino

San Diego

Santa Barbara

Los Angeles

Placerville

Mount Whitney

O R E G O N

M E X I C O

N E V A D A

A

R

I

Z

O

N

A

SaltonSea

BristolLake

RogersLake

ClearLake

LakeTahoe

Clear LakeReservoir

EagleLake

Lake Almanor

GooseLake Upper

Lake

HoneyLake

MonoLake

Merced River

San Joaquin River

Pit River

Tule R iver

Americ

anRi

ver

Feat

her Rive

r

Kaweah River

ShastaRiver

Calaver

as R iver

KlamathRiver

SanDiego River

Eel River

Susan Riv er

Stanis

laus River

Cosu

mnes Rive

r

Kings River

MokelumneRiver

Tuolumne River

Alamo

R

iver

Fresno Riv er

YubaRi

ver

Trin

ityR iv

er

Amargo sa

River

Sacramento

River

Tule Ri ver

White River

Noyo Rive r

Mad River

Owens River

KernRiver

BigR iver

124°0'0"W123°0'0"W

122°0'0"W

122°0'0"W 121°0'0"W

125°0'0"W

120°0'0"W

119°0'0"W

118°0'0"W

117°0'0"W

117°0'0"W

116°0'0"W

116°0'0"W

115°0'0"W

41°0'0"N

41°0'0"N

40°0'0"N

40°0'0"N

39°0'0"N

39°0'0"N

37°0'0"N

36°0'0"N

35°0'0"N

33°0'0"N

33°0'0"N

32°0'0"N

32°0'0"N

124°0'0"W

123°0'0"W

121°0'0"W

125°0'0"W

118°0'0"W

42°0'0"N

42°0'0"N

38°0'0"N38°0'0"N

37°0'0"N

36°0'0"N

35°0'0"N

34°0'0"N

34°0'0"N

120°0'0"W

119°0'0"W

116°0'0"W

Paleozoic metasedimentary rocks. Includes slate, sandstone, shale, chert, conglomerate, limestone, dolomite, marble, phyllite, schist, hornfels, and quartzite.

MESOZOIC

PALEOZOIC

PRECAMBRIAN

PLUTONIC ROCKSMIXED ROCKSMARINE SEDIMENTARY AND METASEDIMENTARY ROCKS

Cretaceous sandstone, shale, and conglomerate; minor non-marine rocks in Peninsular Ranges.

Limestone, dolomite, and marble, probably of Paleozoic or Mesozoic age.

Precambrian igneous and metamorphic rocks.

Gabbro and dark dioritic rocks;chiefly Mesozoic.

Paleogen

eNeogen

e CENOZOIC

Quatern

ary

VOLCANIC ROCKSNONMARINE (CONTINENTAL) SEDIMENTARY ROCKSMARINE SEDIMENTARY ROCKS

Neogene and Paleogene volcanic flows and ash deposits.

GENERALIZED GEOLOGIC UNITS

Quaternary and Neogene non-marine deposits.

Franciscan Complex metavolcanic rock.

Neogene sandstone and shale.

Quaternary surficial deposits. Quaternary glacial deposits. Quaternary volcanic flows and ash deposits.

Sandstone, shale, and minor conglomerate in coastal belt of northwestern California.

Franciscan Complex: Cretaceous and Jurassic sandstone with shale, chert, limestone, and conglomerate. Includes Franciscan melange.

Granitic and metamorphic rocks; mostly gneiss and other meta-morphic rocks intruded by granitic rocks. Mesozoic to Precambrian.

Undivided Mesozoic volcanic, meta-volcanic, and metamorphic rocks.

Ultramafic rocks; mostly serpentine.Minor peridotite, gabbro, and diabase; chiefly Mesozoic.

Granitic rocks; chiefly Mesozoic.

Paleogene sandstone and shale.

Fault − Solid where accurately located; dashed where approximately located; dotted where concealed; queried where uncertain. Arrows along fault indicate relative direction of lateral movement; ball and bar indicates downthrown side of normal fault.

Thrust fault − Solid where accurately located; dashed where approximately located; dotted where concealed; queried where uncertain. Teeth on upper plate.

Contact between geologic units

CaliforniaGeomorphicProvinces

Map Scale: 1:2,000,000

0 10050Miles

0 10050Kilometers

:Copyright © 2018 by the California Department of Conservation, California Geological Survey. All rights reserved. No part of this publication may be reproduced without written consent of theCalifornia Geological Survey.

“The California Department of Conservation makes no warrantiesas to the suitability of this product for any particular purpose.”

www.consrv.ca.gov/cgs Base Map Sources: U.S. Geological Survey, California Department of Fish and Wildlife, California Department of Transportation

A geologic map shows the distribution, relationship, and composition of earth materials including rocks and surficial deposits―such as sediments and landslides―on the earth’s surface. Each color on the map represents a different type or age of rock. Thick black lines represent the locations of faults.

Geologic maps help us understand the geologic history of an area, and to plan for the future. Geologists use the maps to interpret what resources might lie below the surface, such as oil and natural gas, groundwater, and mineral deposits. Geologic maps are also used to identify potential hazards such as landslides, volcanoes, earthquake faults, liquefaction zones, and tsunami hazard zones. Geologic maps are used in environmental and engineering studies to identify areas suitable for agriculture, urban development, and construction. They provide important information needed to build a safer and more sustainable world.

Geology of California

CALIFORNIA GEOLOGICAL SURVEYJOHN G. PARRISH, PH.D., STATE GEOLOGIST

STATE OF CALIFORNIA – EDMUND G. BROWN JR., GOVERNORTHE NATURAL RESOURCES AGENCY – JOHN LAIRD, SECRETARY

DEPARTMENT OF CONSERVATION – DAVID BUNN, DIRECTORMAP SHEET 57

GEOLOGY OF CALIFORNIA