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Altitude of the top of the lower Fort Union aquifer in the Williston structural basin

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: August 25, 2025 | Last Modified: 20201117
These data represent the altitude, in feet above North American Vertical Datum of 1988 (NAVD88), of the lower Fort Union aquifer 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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