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

Preliminary Geologic Maps - Northern Region 

7.5-minute Quadrangles Available to View or Download:

Capell Valley (7.7 MB)
Cotati (4.2 MB)
Cuttings Wharf (3.0 MB)
Fairfield North (6.2 MB)
Glen Ellen (5.4 MB)
Kenwood (2.4 MB)*
Mt. George (3.4 MB)
Mt. Vaca (2.8 MB)*
Napa (3.8 MB)
Novato (2.3 MB)
Petaluma (2.5 MB)
Petaluma River (1.6 MB)
Rutherford (11 MB)
Sears Point (2.0 MB)
Sonoma (3.7 MB)
Two Rock (4.0 MB)
Yountville (10 MB)

* added 10/26/2007


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

South Half Napa

Geologic Map - (14.5 MB)
Pamphlet -  (1 MB)


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:

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 - TWO ROCKPreliminary Geologic Map - COTATIPreliminary Geologic Map - GLEN ELLENPreliminary Geologic Map - SONOMAPreliminary Geologic Map - NAPAPreliminary Geologic Map - MT.GEORGEPreliminary Geologic Map - PETALUMAPreliminary Geologic Map - PETALUMA RIVERPreliminary Geologic Map - SEARS POINTPreliminary Geologic Map - CUTTINGS WHARFPreliminary Geologic Map - NOVATOPreliminary Geologic Map - YOUNTVILLEPreliminary Geologic Map - RUTHERFORDPreliminary Geologic Map - CAPELL VALLEYPreliminary Geologic Map - FAIRFIELD NORTHPreliminary Geologic Map Index-Northern California