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Volcanic and sedimentary-rock aquifers

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: May 05, 2026 at 08:58 PM | Dataset Last Updated: November 17, 2020 at 12:00 AM
This data set represents the extent of the Volcanic and sedimentary-rock aquifers in the states of Montana, Wyoming, Idaho, Nevada, California, Oregon, and Washington.

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