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  1. www.usgs.gov › what-national-geologic-map-databaseWhat is the National Geologic Map Database? | U.S. Geological ...

    The National Geologic Map Database (NGMDB) is an archive of geoscience maps (including geology maps), reports, and stratigraphic information for the United States. The NGMDB contains information on more than 90,000 maps and related geoscience reports published from the early 1800s to the present day, by more than 630 agencies, universities, associations, and private companies.

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    • 11 National Geologic Map Database - Maps Database Source
    • Geologic Maps of the 50 United States
    • USGS National Geologic Map Database MapView | p...
    • Geologic map of Meteor Crater, Arizona | AZGS
    • USGS Publishes Updated State Geologic Map Compilation #geoscience # ...
    • Types of Maps: Political, Physical, Weather, and More | EdrawMax

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  3. macrostrat.orgMacrostrat

    With over 225 maps from data providers around the world across every scale, Macrostrat is the world's largest homogenized geologic map database. Our data processing pipeline links geologic map polygons to Macrostrat column polygons, external stratigraphic name lexicons, and geochronological intervals, enabling the enhancement of the original ...

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