CALIFORNIA GEOLOGICAL SURVEY
Welcome to the California Geological Survey Web Site. We're here to help you find information on the geology, natural resources and geologic hazards of California.
In 1880 the California Legislature established the State Mining Bureau which has evolved during its 127 years of continuous service into the modern California Geological Survey (CGS). Of course the earliest history of CGS has its founding roots entwined with the discovery of gold in 1848.
The CGS staff is dedicated to the fulfillment of our stated mission of providing information and advice to protect life and property from natural hazards and to promote a better understanding of California's diverse geologic environment.
CGS geoscientists, engineers, and support staff take great pride in being part of an organization that has a 127 year legacy of providing scientific and engineering service to the State of California.
Thank you, California!
RECENT RELEASES
- October 28, 2009 - Special Report 210
Update of Mineral Land Classification: Aggregate Materials in the Bakersfield Production-Consumption Region, Kern County, California. Click here to view the Release Statement.
- October 21, 2009 - New CGS Note - Tsunamis
This educational document is a companion to the statewide inundation maps (public release in Decemeber, 2009). This is one in a series of CGS Notes devoted to different geologic features or hazards important to California. Click here to view the new CGS Note.
- May 22, 2009 - Special Report 211
Radon Potential in the Lake Tahoe Area, California
Click here to view the Release StatementClick here to view the Report and Map.
- May 21, 2009 - Special Report 206
Update of Mineral Land Classification for Portland Cement Concrete-Grade Aggregate in the San Bernardino Production-Consumption Region, San Bernardino and Riverside Counties, California.
Click here to view the Release Statement.
- February 27, 2009 - New Map Release
CGS has released one new Official Seismic Hazard Zone Map for the Altamont Quadrangle in western Alameda County. Click here to view the maps.
- Click here for more recent releases!
