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Altitude of the top of the Upper Hell Creek hydrogeologic unit in the Williston structural basin

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2020-11-17T00:00:00Z
These data represent the altitude, in feet above North American Vertical Datum of 1988 (NAVD88), of the Upper Hell Creek hydrogeologic unit in the Williston structural basin. The data are presented as ASCII text files that can be converted to continuous raster format.

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