What is the National Geologic Map Database Data Portal?

The National Geologic Map Database Data Portal is intended to: 1) give the user a quick browse and query of our Nation's geologic maps, in a standardized format, and 2) link the user to the source information found via the NGMDB Map Catalog and Geologic Names Lexicon. More than 80,000 maps and reports, by 370 publishers, are accessible.

For more information go to the Portal