California Geological Survey Library
CGS Library hours of operation:
Monday, Tuesday, Wednesday, and Thursday.Please note these changes in Library hours:
9:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:00 p.m.
The Library is closed on Fridays.
For information about how to order CGS publications, please click here.
- June 12: open 1:00 p.m. to 4:00 p.m.
- June 13: closed
- June 14: open 1:00 p.m. to 4:00 p.m.
- June 15: open 1:00 p.m. to 4:00 p.m.
CGS has a new website for searching historic documents, including the entire collection of California Geology. The CGS Digital Archive is a portal to historic images, texts, and maps detailing the mining and geologic history of California and the West. Click
here to enter the CGS Digital Archive.
Library or reference questions: 916-327-1850
801 K Street, 14th Floor (or MS 14-34 for address)
Sacramento, CA 95814-3532
Under several different names, the California Geological Survey Library has been in existence since 1880 and has developed into an extensive collection of scientific and technical materials on Earthquakes, Engineering Geology, Environmental Geology, Geology of California, Geomorphology, Groundwater, Hydrogeology, Landslides, Mapping, Mined Land Reclamation, Mineral Resources, Mining, Seismology, Soil Mineralogy, Structural Geology, Tectonics, Water Resources and Volcanology.
The Library has over 100,000 books and reports, including
CGS publications, various map collections, photographs, U.S. Geological Survey publications and
periodicals. To see some of our historical gold mining photographs,
click here. To see a sample of photos of California minerals and mines
click here. CGS now also has the
California Geology Magazine in an online searchable database.
The Library is open to the public for reference and research. Materials may be borrowed through interlibrary loan only.
The Library is a designated State Earth Science Information Center (ESIC), under an agreement with the U.S. Geological Survey, tasked to respond to requests for earth science information.
To purchase CGS publications
CGS publications are also available for reference at our
Bay Area and
Los Angeles offices. All of our publications, including those no longer available for purchase, may be viewed at the following libraries:
California State Library; California State Universities, Chico, Long Beach, San Diego; Fresno County Free Library; Los Angeles Public Library; San Diego Public Library; San Francisco Public Library; Stanford University; University of California, Berkeley, Davis, Los Angeles, San Diego and Santa Barbara.