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Start Over You searched for: Place Alaska Remove constraint Place: Alaska Resource Type Polygon data Remove constraint Resource Type: Polygon data Subject Hydrogeology Remove constraint Subject: Hydrogeology

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2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).