Maps

The National Geologic Map Database Project (NGMDB) is a collaborative effort primarily involving the
USGS and the Association of American State Geologists (AASG). Includes maps, historical topographic maps, stratigraphy, standards & guides, and Geologic Map Schema.

Provides access to over 170,000 publications written by USGS scientists over the century-plus history of the bureau.

Download images and maps from the U.S. Geological Survey.

The USGS Volcano Hazards Program enhances public safety and minimize social and economic disruption from volcanic unrest and eruption. We accomplish this by delivering effective forecasts, warnings, and information about volcano hazards based on scientific understanding of volcanic processes. Learn more by exploring USGS volcanic maps.

This is the standard used in the production of USGS geologic maps. It contains descriptions, examples, cartographic specifications, and notes on usage for a wide variety of symbols that may be used on typical, general-purpose geologic maps and related products such as cross sections.