surficial geology of san diego-tijuana area, usa and ... · surficial geology of san diego-tijuana...

0

-7,000-4,000

-500

1,000

5,00012,000

Elevation, in feet,NAVD88

Volcanic (onshore) and undivided sedimentary and volcanic rocks (offshore)

MioceneMetavolcanic and Metasedimentary Rocks (Mesozoic)

Santiago Peak VolcanicsUndivided

Crystalline Rocks (Mesozoic)

MetamorphicIntrusive

Undivided Sedimentary DepositsQuaternary

Water

Undivided Sedimentary RocksPlio-Pleistocene (San Diego Formation)

Oligocene (Otay Formation)Miocene

EoceneCretaceous

Geology

EXPLANATION

Tecate Creek

Creek

Campo

Sa n Die gu

ito R .

YsabelCreek

San

Diego River

Otay River

Sweetwater

River

Santa

River

Tijuana

wood

Cotton

Cree

k

Carlsbad Canyon

Islas De LosCoronados

La Jolla Canyon

Coronado Bank

El CapitanLake

UpperOtay Lake

San VicenteReservoir

MorenaReservoir

LakeCuyamaca

BarrettLake

LakeSutherlandLake

Hodges

LovelandReservoir

Lower OtayLake

SweetwaterReservoir

El CarrizoReservoir

Aberardo L.Rodriguez Dam

SaltonSea

San Diego Trough

Fault — Selected faults from multiple sources. Solid where accurately located, dashed where approximately located, dotted where concealed.

Pacif icO

cean

United States

Mexico Baja CaliforniaCalifornia

Pe

ni

ns

ul

ar

Ra

ng

e

Study areaboundary

C o l o r a d o R i v e r H y d r o l o g i c Re

gi o

n

MountainsSan Ysidro

Laguna Mountains

Riverside County

San Diego C

ountyIm

perial County

Colorized elevation model base from U.S. Geological Surveydigital elevation data, 1/3 arc-second resolution

0 20 MILES

0

10

10 20 KILOMETERS

117°30’ 117°00’ 116°30’ 116°00’

33°00’

32°30’

Surficial geology of San Diego-Tijuana area, USA and Mexico (Cromwell, unpublished).

San DiegoEmbayment

Santee

La Mesa

El Cajon

San Diego

Chula Vista

Tijuana

Tecate

National City

Rosarito

Escondido

Oceanside

Del Mar

La Jolla

Poway

Encinitas Julian

Campo

Study area

CALIFORNIA U.S.A.