1. 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 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2023 Resource Type: Map Access & Availability: Loading
2. Maps showing altitude of the potentiometric surface and changes in water levels of the alluvial aquifer in eastern Arkansas, Spring 1983 Author/Creator: Edds, Joe, 1924- cartographer Publication/Creation: [Litte Rock, Arkansas] : U.S. Department of the Interior, U.S. Geological Survey, [1984] Resource Type: Map Access & Availability: Loading