DOC Maps: California Geology

The California Department of Conservation is home to the California Geological Survey (CGS).

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).

The California Geological Survey provides geologic data and information to the State of California.

Quick Access

Interactive Web Maps: Subject specific web maps
Data Viewer: Pick the data to explore
Geologic Data & Maps: Find Data

Interactive Web Maps

Scroll through the available web maps at the bottom. Click on the large picture (or the Open Map link) to open the web map in a new tab.

Quaternary Surficial Geology of Southern California(open map)
Geologic Gems of the California State Parks(open map)
Geologic Map of California (open map)
Fault Activity Map (open map)
Landslide Inventory Database (open map)
Indoor Radon Potential (open map)
Wildland Fire & Landslide Susceptibility (open map)

Data Viewer

Open full screen in a new tab

Geologic Data & Maps

Notes:

[AGOL] indicates that the Department of Conservation's official ArcGIS Online account hosts the data using cloud-based services.