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CGS / Regional Geologic Hazards and Mapping Program / Regional Geologic Mapping

Preliminary Geologic Maps - Southern Region 

7.5 Minute Quadrangles (1:24,000 Scale)

Aguanga (5.2 MB) Lake Hughes (6 MB) Pechanga (4.2 MB) Saticoy (4.6 MB)
Apple Valley North (3.1 MB) Lancaster East (3.5 MB) Pismo Beach (4.5 MB) Sleepy Valley (4.3 MB)*
Atascadero (3.6 MB)* Lancaster West (3.8 MB) Pitas Point (2.1 MB) Temecula (4.8 MB)
Bonsall (3.2 MB) Las Pulgas Canyon (3.7 MB) Point Mugu (5.2 MB) Vail Lake (6.2 MB)
Boucher Hill (8.9 MB) Little Buttes (2.1 MB)* Ramona (4.0 MB) Valley Center (3.3 MB) 
Camarillo (2.3 MB) Margarita Peak (5 MB) Ritter Ridge (8.6 MB) Ventura (6 MB)
Dana Point (2.3 MB) Matilija (6.1 MB) San Clemente (5.2 MB) Victorville (6.4 MB)
Del Sur (4.6 MB) Morro Bay South (6.1 MB) San Luis Obispo (5.5 MB) White Ledge Peak (3.1 MB)
El Cajon (2.2 MB) Morro Hill (3 MB) San Onofre Bluff (1.9 MB)
Escondido (2.7 MB) Ojai (10 MB) San Pasqual (2.5 MB)
Fairmont Butte (3.9 MB) Otay Mesa (1.2 MB) San Vicente Reservoir (1.7 MB)
Fallbrook (4.7 MB) Oxnard (2.2 MB) Santa Paula (3.6 MB) *  added 11/15/2012
Jamul Mountains (2.1 MB) Pala (4 MB) Santa Paula Peak (11 MB)



30 x 60 Minute Quadrangles (1:100,000 Scale)

Oceanside San Diego
The Oceanside 30' x 60' Geologic Map has been published as RGM No. 2.  Click to View the geologic map (map is located on USGS's National Geologic Map Database web site).  This map and other RGM maps can be purchased through the CGS Publications. The San Diego 30' x 60' Geologic Map has been published as RGM No. 3.  Click to View the geologic map (map is located on USGS's National Geologic Map Database web site).  This map and other RGM maps can be purchased through the CGS Publications.
Long Beach East Half Santa Barbara
Sheet 1 - Geologic Map (7.8 MB) Sheet 1 - Geologic Map (33.5 MB)
Sheet 2 - Correlation and description of map units Sheet 2 - Correlation and description of map units

These maps were created in Adobe Portable Document Format (PDF), and require Adobe Acrobat reader to open. You can download Acrobat by clicking on the icon at the bottom of this page, or by clicking here.

View/Download Maps: (NOTE: All the maps listed above are not displayed on the image below)

To view: click on quadrangle name, map will open in Adobe Acrobat.
To download: with map open, go to Acrobat tool bar, click on the disk icon and a "save a copy" dialog box will open. Or you can right-click on quadrangle name in the list above and select "save target as" to save file to your hard drive.

Download Adobe Acrobat Reader

Preliminary Geologic Map - WHITE LEDGE PEAKPreliminary Geologic Map - PITAS POINTPreliminary Geologic Map - VENTURAPreliminary Geologic Map - SATICOYPreliminary Geologic Map - SANTA PAULAPreliminary Geologic Map - OXNARDPreliminary Geologic Map - CAMARILLOPreliminary Geologic Map - POINT MUGUPreliminary Geologic Map - OJAIPreliminary Geologic Map - SANTA PAULA PEAKPreliminary Geologic Map - MATILIJA

Preliminary Geologic Map - DANA POINTPreliminary Geologic Map - MARGARITA PEAKPreliminary Geologic Map - SAN CLEMENTEPreliminary Geologic Map - FALLBROOKPreliminary Geologic Map - TEMECULAPreliminary Geologic Map - PECHANGAPreliminary Geologic Map - VAIL LAKEPreliminary Geologic Map - AGUANGAPreliminary Geologic Map - SAN ONOFRE BLUFFPreliminary Geologic Map - LAS PULGAS CANYONPreliminary Geologic Map - MORRO HILLPreliminary Geologic Map - BONSALLPreliminary Geologic Map - PALAPreliminary Geologic Map - VALLEY CENTERPreliminary Geologic Map - ESCONDIDOPreliminary Geologic Map - SAN VICENTE RESERVOIRPreliminary Geologic Map - EL CAJONPreliminary Geologic Map - JAMUL MOUNTAINSPreliminary Geologic Map - OTAY MESAOceanside - Sheet 1San Diego - Sheet 1