Mark W. Bultman Margaret E. Berry Kenzie J. Turner Christopher M. Menges Floyd Gray James B. Paces D. Paco Van Sistine Leah E. Morgan Jeremy C. Havens William R. Page 2023 <p>This report includes an updated geologic map and cross sections of the upper Santa Cruz River basin, southern Arizona. The map and cross sections describe the geometry, thickness, and structure of the Miocene to Holocene units which form the main aquifers in the basin. The report also includes results of new hydrogeologic studies including (1) mapping and defining depth to bedrock based on geophysical data in the map area to better define the geometry and structure of the basin aquifers, (2) describing newly recognized hydrologically significant faults in the Peck Canyon and Sopori Wash areas, and (3) evaluating groundwater sources and hydrogeology of the Potrero Creek wetlands.</p> application/pdf 10.3133/sim3490 en U.S. Geological Survey Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona reports