STATE OF CALIFORNIA - GRAY DAVIS, GOVERNOR THE RESOURCES AGENCY - MARY NICHOLS, SECRETARY FOR RESOURCES DEPARTMENT OF CONSERVATION - DARRYL YOUNG, DIRECTOR

DIVISION OF MINES AND GEOLOGYJAMES F. DAVIS, STATE GEOLOGIST Prepared in cooperation with the U.S. Geological Survey

117 15' 00"33 30' 00" 33 30' 00"

117 07' 30"

33 22' 30"117 07' 30"117 15' 00"

33 22' 30"

Topographic base by U.S. Geological Survey7.5' Temecula QuadranglePolyconic projection, contour interval 20 feet,dotted lines 10 feet.

UTM GRID AND 1975 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET

0 06'

GNMN

CORRELATION OF MAP UNITS MAP SYMBOLS

DEPARTMENT OFCONSERVATION Division ofMines and Geology

14.5

2 MILS258 MILS

REFERENCES

Engle, R., 1959, Geology of the Lake Elsinore quadrangle, California: California Division of Mines Bulletin 146, Plate 1, scale 1:62,500.

Kennedy, M.P., 1977, Recency and character of faulting along the Elsinore fault zone in southern Riverside county, California: California Department of Conservation, Division of Mines and Geology, Special Report 131, Plate 1, scale 1:28,000.

Larsen, E.S., Jr., 1948, Batholith and associated rocks of Corona, Elsinore and San Luis Rey Quadrangles, southern California: The Geological Society of America Memoir 29, Plate 1, scale 1:125,000.

Weber, H.F., Jr., 1963, Geology and mineral resources of San Diego County, California: California Division of Mines and Geology County Report 3, Plate 1, scale 1:120,000.

Contact between map units; generally approximately located or inferred.

Faults, generally accurately located. Arrow and number indicate directionand angle of dip of fault plane.

Strike and dip of inclined sedimentary bed.

Strike and dip of metamorphic foliation.

Landslide; arrows indicate principal direction of movement.

EXPLANATION OF MAP UNITS

Qoa

KJm

Holocene

QUATERNARY

CRETACEOUS

JURASSIC

Qls

Qoa

Kr Kgd Kt KgbKJm

Qa

Kr

Kgd

Kt

Kgb

Qpf

Qa

MODERN SURFICIAL DEPOSITS - Sediment that has been recentlytransported and deposited in channels and washes, on surfaces of alluvialfans and alluvial plains, and on hillslopes and in artificial fills. Soil-profiledevelopment is non-existant. Includes:

Qls

BEDROCK UNITS

Pauba Formation fanglomerate facies (Pleistocene) - well-indurated poorly sorted sedimentary breccia and mudstone.

Pauba Formation sandstone facies (Pleistocene) - Light-brown moderatelywell-indurated, extensively crossbedded, channeled and filled sandstoneand siltstone that contains occasional intervening cobble-and-boulderconglomerate beds.

Older alluvial flood plain deposits (Pleistocene, younger than 500,000years) - Mostly moderately well consolidated, poorly sorted, permeableflood plain deposits.

OLD SURFICIAL DEPOSITS - Sedimentary units that are moderatelyconsolidated and slightly to moderately well dissected. Older surficialdeposits have upper surfaces that are capped by moderately to well-developed pedogenic soils. Includes:

Landslide deposits (Holocene to Pleistocene) - Landslide slump and rockfall deposits.

Active alluvial flood plain deposits (late Holocene) - Unconsolidated to locally poorly consolidated sand and gravel deposits in active alluvial flood plains.

Granodiorite of Rainbow (Cretaceous) - Leucocratic hornblende-biotitegranodiorite; medium to coarse grained, massive.

Granodiorite undivided (Cretaceous) - Mostly hornblende-biotitegranodiorite; coarse to medium grained.

Tonalite undivided (Cretaceous) - Mostly hornblende-biotite tonalite;coarse grained, light gray.

Gabbro undivided (Cretaceous) - Mostly biotite-hornblende-hypersthenegabbro; coarse grained, dark gray, massive.

Metavolcanic and metasedimentary rocks undivided (Cretaceous andJurassic) - Low grade (greenschist facies) rocks that are in part coeval with and in part older than the Cretaceous plutonic rocks they lie in contact with.

Classification of plutonic rock types (from IUGA, 1973, and *Streckeisen, 1973).A, alkali feldspar; P, plagioclase feldspar; Q, quartz.

QuartzSyenite

QuartzMonzonite

QuartzMonzodiorite

Syenite Monzonite Monzodiorite

Granite

Alk

ali-f

elds

par G

rani

te

Tonalite

Diorite

Syen

ogra

nite

Granodiorite

Mon

zogr

anite

Quartz

Diorite

90 65 35 10

5

20

60Q Q

A P

60

20

5

60

*Streckeisen, A.L, 1973. Plutonic rocks--Clasification and nomenclature by the IUGA Subcommission on Systematics of Igneous Rocks: Geotimes, vol.18, p.26-30.

CENOZOIC

MESOZOIC

Qp

Qpf

QpPleistocene

San

Onofre

Bluff

Mar

garit

a

Peak

Fallbr

ook

Tem

ecula

Pecha

nga

PalaBon

sall

Mor

ro

Hill

Valley

Cente

r

San

Clemen

te

Escon

dido

Las

Pulgas

Canyo

n

Pacific Ocean

1

5

74

5

78

76

15

71 79

79

Oceanside

SanClemente

Laguna Beach

Encinitas

Mission Viejo

San Juan Capistrano

Murrieta

Temecula

Fallbrook

San Marcos Escondido

Dana

Point

GEOLOGIC MAP OF THETEMECULA 7.5' QUADRANGLE

SAN DIEGO AND RIVERSIDE COUNTIES, CALIFORNIA: A DIGITAL DATABASE

VERSION 1.0By

Siang S. Tan1 and Michael P. Kennedy1

Digital Databaseby

Brad Nelson2 and Gary Patt2

2000

1. California Division of Mines and Geology, Los Angeles, CA2. U. S. Geological Survey, Riverside, CA

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kt

Kgb

Kgb

Kgb

Kgb

Kgb

Kgb

Kr

Kr

Kr

Kgd

Kgd

Kr

Kr

Kr

Kgd

Kgd

Kr

Kgd

KJm

KJm

KJm

KJm

KJm

KJm

KJm

KJm

KJm

KJm

KJm

QpfQpf

Qpf

QpQp

Qp

Qp

Qa

Qa

Qa

Qa

Qa

Qa

Qa

Qa

Qoa

QoaQoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qoa

Qls

Qls

Qls?

Qoa

Qa

Kr

Qoa

Kr Kr

Kgb

Copyright 2000 by the California Department of Conservation Division of Mines and Geology. All rights reserved. No part ofthis publication may be reproduced without written consent of theDivision of Mines and Geology.

"The Department of Conservation makes no warranties as to thesuitability of this product for any given purpose."

cThis geologic map was funded in part by the U.S. Geological Survey National Cooperative Geologic Mapping Program, STATEMAP Award no. 99HQAG0134.