Maps of elevation of top of Pierre Shale and surficial deposit thickness with hydraulic properties from borehole geophysics and aquifers tests within and near Ellsworth Air Force Base, South Dakota, 2020–21
Abstract:The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, collected borehole geophysical data and completed simple aquifer tests to estimate the thickness and hydraulic properties of surficial deposits. The purpose of data collection was to create generalized contour maps of the elevation of the top of the Pierre Shale and the thickness of overlying surficial deposits within and near Ellsworth Air Force Base (study area). Natural gamma and electromagnetic induction data were col… Show more
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