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Ashland coalfield boundary; assessment area for the Knobloch coal resource unit (knbndg.shp)

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:04 AM | Dataset Last Updated: May 24, 2021 at 12:00 AM
This ArcView shapefile contains a polygon representation of the Ashland coalfield, Montana, as defined in the USGS National Coal Resource Assessment (NCRA) project. This theme was created specifically for the National Coal Resources Assessment in the Northern Rocky Mountains and Great Plains Region.

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