Explore Search: geologic map
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.
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.
![image of publications layered on a wooden table](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/search_result/public/media/images/newsletter-search-default-thumbnails-pubs_0.png?h=6bc574fb&itok=Ua9gRH5Z)
Geologic map of the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colorado
![image of publications layered on a wooden table](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/search_result/public/media/images/newsletter-search-default-thumbnails-pubs_0.png?h=6bc574fb&itok=Ua9gRH5Z)
Geologic map of the Arsenic Peak quadrangle, Teton and Lewis and Clark Counties, Montana
![Collage of USGS Maps.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/search_result/public/media/images/newsletter-search-default-thumbnails-real-time-maps_0.png?h=6bc574fb&itok=HLLitYZf)