CALIFORNIA GEOLOGICAL SURVEY
Welcome to the California Geological Survey Web Site!
In April 1860 the California Legislature established the Geological Survey of California that has evolved during its 150 years of service, and several name changes, into today’s modern California Geological Survey (CGS). Of course, the earliest history of CGS has its founding roots entwined with the discovery of gold in 1848.
CGS is dedicated to the fulfillment of its mission to provide scientific products and services about the state's geology, seismology and mineral resources that affect the health, safety, and business interests of the people of California.
CGS geoscientists, engineers and support staff take great pride in upholding the heritage of an organization that has a 150 year legacy of providing the highest quality of scientific and engineering products and services to the State of California.
Altiora Petimus (1860)
RECENT RELEASES
- January 6, 2012 - New 2012 CGS Calendar!
Visit the CGS Library and pick up your copy for $2 today! (Limited supplies on hand, walk-ins only)
Click here to download your own calendar.
December 30, 2011 - New Map Release - Landslide Inventory Maps
CGS has released maps for the Lick Observatory and Murrieta 7-5-Minute Quadrangles.
Click here for the Release Statement.Click here to go to the maps.
- August 22, 2011 - Map Sheet 59
Reported Historic Asbestos Mines, Historic Asbestos Prospects, and other Natural Occurrences of Asbestos in California.
Click here for the Release Statement.Click here to download the Map Sheet.
- July 6, 2011 - Special Report 220
Liquefaction and other Ground Failures in Imperial County, California, from the April 4, 2010, El Mayor-Cucapah Earthquake
Click here for the Release Statement.Click here for SR 220 Report (49MB file).Click here for SR 220 Plate.Click here for SR 220 Detailed Sites Table.
- June 28, 2011 - New Map Release - Landslide Inventory Maps
CGS has released maps for the Calaveras Reservoir, Milpitas, Niles, San Jose East and San Jose West 7-5-Minute Quadrangles.
Click here for the Release Statement.Click here to go to the maps.
- CGS releases State Geologic Map and State Fault Activity Map.
Printed copies are now available for purchase.
Geologic Map Release Statement.
Fault Activity Map Release Statement.
- Click here for more recent releases!