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National Geologic Map Database

ngmdb.usgs.govsite

This is a nation wide geologic map database developed by USGS's National Geologic Map Database (NGMDB) that comes with thousands of georeferenced geologic maps searchable through map interaction. Maps are visible at the zoom level that they were originally mapped.

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Urban & Regional Planning
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2026-10-10
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Urban & Regional Planning › Public Data Resources > Environment and Ecosystem Services: “This is a nation wide geologic map database developed by USGS's National Geologic Map Database (NGMDB) that comes with thousands of georeferenced geologic maps searchable through map interaction. Maps are visible at the zoom level that they were originally mapped.”