F

Monocline

Anticline

Scarp

4 4 4 Attenuation fault--Dashed where inferred

M Syncline

Fault--Dashed where inferred, dotted where concealed

@ Fault--Concealed, queried

@ @ Fault--inferred, queried

Normal fault--Dashed where inferred, dotted where concealed

Strike slip fault--Dashed where inferred, dotted where concealed

Landslide headscarp

Contact--Dashed where inferred, dotted where concealed

Shoreline

Surface

EXPLANATION 

Fluvial terrace riser

M

ALLUVIAL DEPOSITS

Active wash deposit (Holocene)

Active valley-axis deposit (Holoc( ene)

Active alluvial fan deposit (Holocene)

Active alluvial fan deposit (Holocene)

Active alluvial fan deposit (Holocene)

Young wash deposit (Holocene and late Pleistocene)

Young alluvial fan deposit (Holocene and late Pleistocene)

Young alluvial fan deposit (Holocene and late Pleistocene)

Intermediate wash deposit (late to middle Pleistocene) 

Intermediate alluvial fan deposit (late to middle Pleistocene)

Intermediate alluvial fan deposit, older (late to middle Pleistocene)

Old alluvial fan deposit (middle to early Pleistocene)

Alluvial fan deposit undifferentiated (Quaternary)

Extremely old alluvial fan deposit (early Pleistocene to Pliocene)

Sedimentary rocks (early Pleistocene and (or) late Pliocene)

PLAYA, PALUDAL, AND LACUSTRINE DEPOSITS

Active saline lake deposit (Holocene)

Active playa deposit (Holocene), sandy facies

Active playa deposit (Holocene), mixed eolian, lacustrine, playa, alluvial

Young playa deposit (Holocene and late Pleistocene)

Playa fringe saline facies (Holocene and late Pleistocene) 

Young lacustrine beach deposit (Holocene to late Pleistocene)

Young lacustrine deposit (Holocene to late Pleistocene) 

Intermediate lacustrine beach deposit (late to middle Pleistocene)

Intermediate nearshore tufa deposit (late to middle Pleistocene) 

Intermediate lacustrine and deltaic deposits (late to middle Pleistocene) 

Intermediate lacustrine, wetlands and playa deposits (late(?)

 or middle early Pleistocene) 

EOLIAN DEPOSITS

Active eolian dune deposit (Holocene)

Young eolian deposit (Holocene and latest Pleistocene)

Young mixed alluvial and eolian deposit (Holocene and latest Pleistocene)

Young mixed alluvial and eolian deposit (Holocene and latest Pleistocene)

Intermediate alluvial and mixed eolian deposit (late to middle Pleistocene)

Old mixed alluvial and eolian deposit (late to middle Pleistocene)

Active eolian dune deposit (Holocene)

QToa

QTs

Qaa

Qaa1

Qae

Qaed

Qap Active playa deposit (Holocene)

Qapf

Qaps

Qau

Qav

Qaw

Qia

Qiae

Qiao

Qibg

Qiw

Qoa

Qsm

Qya

Qyae

Qyao

Qyb

Qye

Qyl

Qyp

Qyw

Qasl

Active saline marsh deposit (Holocene)

Qaae

Qysl

Qol

GROUNDWATER AND SPRING DEPOSITS

MADE LAND, HILLSLOPE, AND MASS WASTING DEPOSITS

Made land (Recent)

Colluvial deposits (Holocene and Pleistocene)

Mass-movement deposits (Holocene and Pleistocene)

Older colluvial deposits (Pleistocene ?)

Block slide deposits (Pleistocene and or late Pliocene)

VOLCANIC AND OLDER SEDIMENTARY ROCKS

Volcanic ash (Quaternary)

Basalt and other mafic volcanic rocks (mainly Quaternary)

Volcanic rocks (Quaternary)

Volcanic center, basalt and other mafic volcanic rocks (Quaternary and

or late Pliocene)

Basalt and other mafic volcanic rocks (Quaternary and or late Pliocene)

Conglomerate (Pliocene ?)

Sedimentary Rocks (Pliocene)

Coso Formation (Pliocene)—Divided informally into :

Rhyodacite (Pliocene)

Mainly sedimentary rocks (Pliocene)

Coso Formation, undifferentiated (Pliocene)

Coso Formation, undifferentiated volcanic rocks (Pliocene)

Red weathering rhyodacitic volcanic rock (Pliocene)

Mainly volcanic ash and tephra (Pliocene)

Lower volcanic ash and tephra (Pliocene)

Older dacitic volcanic rock (Pliocene)

Mainly flood-like basalt flows and other mafic volcanic rocks (Pliocene)

Volcanic ash flow and ash (early Pliocene and (or) late Miocene) 

Volcanic ash flow and ash(early Pliocene and (or) late Miocene) 

Sedimentary rocks (early Pliocene and (or) late Miocene)

Sedimentary rocks (late Miocene ?)

Volcanic rock (early Pliocene to late middle Miocene)

Pediment surfaces (middle and late Quaternary)

QTb

QTbc

QTsbk

Qapd

Qash

Qb

Qc

Qoc

Qvu

Tb

Tbc

Tca

Tcla

Tcs

Tcu

Tcv

Tcvr

Trb

Tsa

Tv

Tvcf

Tvd

Tvdo

Tvrc

ml

Eruptive centers for basalt flows and other mafic volcanic rocks (Pliocene)

Qit

Qil

Qoae

Sag pond (Holocene)

Active groundwater discharge deposit (Holocene)

Spring mound deposits (Holocene) 

Wetland deposits (Holocene)

Young groundwater discharge deposit (Holocene and latest Pleistocene)

Intermediate groundwater discharge deposit (late to middle Pleistocene)

Old groundwater discharge deposit (middle Pleistocene or older)

Qag

Qags

Qagw

Qigw

Qogw

Qsgp

Qygw

LIST OF MAP UNITS

[Some unit exposures on the printed or plotted map are too small to distinguish the color for unit identification. 

 These units are labeled where possible, and unlabeled units are attributed in the data base.]

Qls

Tcgl

Ts

GEOMORPHIC FEATURES

Scientific Investigations Map 3040

 Sheet 2 of 2

 Pamphlet accompanies map

SURFICIAL DEPOSITS

Qyaoe

ault

Hunter Mtn Fault

Panam

117 00' o

QUATERNARY QUATERNARY (?)

 AND TERTIARY

TERTIARY

D OLDER 

Y ROCKS

Holocene Holocene

 and 

 Late Pleistocene

Pliocene and (or) 

 Pleistocene(?)

Pliocene Pleistocene

 Late Miocene(?) and (or) Pliocene

PRE-TERTIARY

Bedrock

Paleozoic and

 Mesozoic

Mesozoic

Precambrian, 

Paleozoic and

 Mesozoic

GEOMORPHIC FEATURES

o Range

Es

KJg

KJpd

Kgu

MzPz

MzPzpd

QTb

Qapd

ash

Qvu

Tbc

Tbes

Tbpd

Tca

Tcla

Tcpd

cv

Trb

cf

Tvd

Tvdo

Tves

Tvpd

Tvrc

ca

ff

ve

Tcgl

Tblag

Rainbo

 roll