National Geologic Map Database
General Information
- Title: Quaternary geology of Santa Clara Valley, Santa Clara, Alameda, and San Mateo Counties, California: a digital database
- Author(s): Helley, E.J., Graymer, R.W., Phelps, G.A., Showalter, P.K., and Wentworth, C.M.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Open-File Report OF-94-231 [Plate 1}
- Larger Work: Preliminary Quaternary geologic maps of Santa Clara Valley, Santa Clara, Alameda, and San Mateo counties, California: a digital database
- Publication Date: 1994
- Map Scale: 1:50,000
- Cross Section: None
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Additional Resources
- Links and Downloads:
- Publication (includes original ARC/INFO 6.x GIS data)
- Shapefile version (created by NGMDB, Feb., 2024 )
- For more information, please contact:
- U.S. Geological Survey
- USGS Information Services
- Box 25286
- Denver, CO 80225
- Phone: (303) 202-4700 or 1-888-ASK-USGS
- Fax: (303) 202-4710
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.