Are there geologic maps or publications for where I live?

Detailed geologic mapping has not been completed for the entire United States, but maps are available for most locations. Geologic maps at many scales and from many sources are listed in the National Geologic Map Database.

Some geologic maps can be purchased in hard copy through the USGS Store.

Download digital geologic maps for entire states from the USGS Mineral Resources Online Geospatial Data (MRDATA) website. Scroll down to the "Geologic Data" section.

If you don't find geologic maps for your area in any of these locations, additional information may be available from the Association of American State Geologists, or a major library near you (especially if they can provide inter-library loan service). Many state geological surveys have detailed maps that can be downloaded or purchased.

The best place to look for publications about a specific area is the USGS Publications Warehouse. Try searching on place names, county names, and (if you know it) topographic quadrangle names, as USGS data is often referenced to those locations.

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What is the National Geologic Map Database?

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The National Geologic Map Database (NGMDB)

The U.S. National Geologic Map Database (NGMDB) serves as the authoritative, comprehensive resource for information about paper and digital geoscience maps and reports on the Nation's geology and stratigraphy, by all publishers. 

Date published: March 15, 2016

Publications Warehouse

Gain access to over 100,000 publications written by USGS scientists over the century-plus history of the bureau.

Date published: March 12, 2016

Mineral Resources On-Line Spatial Data

Interactive maps and downloadable data for regional and global Geology, Geochemistry, Geophysics, and Mineral Resources.

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Stitching Together the New Digital Geologic Quilt of the United States

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First Ever Digital Geologic Map of Alaska Published

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Geologic map of the conterminous United States
April 25, 2016

Geologic map of the conterminous United States

Geologic map of the conterminous United States at 1:2,500,000 scale.

Image: Geologic Map of North America
February 1, 2005

Geologic Map of North America

This map was produced from Geographic Information System (GIS) files prepared by the USGS National Geologic Map Database (NGMDB).  The GMNA Resources Site has the geospatial files, map images, publication documentation, and informational resources.

The

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Geologic Map of Big Bend National Park, Texas
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Detail of the Geologic Map of Big Bend National Park

Zoomed in detail of the Geologic Map of Big Bend National Park

The Alaska Geologic Map shows the generalized geology of the state, each color representing a different type or age of rock

Alaska Geologic Map shows the generalized geology of the state

The Alaska Geologic Map shows the generalized geology of the state, each color representing a different type or age of rock, from USGS Scientific Investigations Map 3340 - Geologic map of Alaska.