Title: Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona By William R. Page, Mark W. Bultman, Margaret E. Berry, Kenzie J. Turner, Christopher M. Menges, Floyd Gray, James B. Paces, D. Paco VanSistine, Leah E. Morgan, and Jeremy C. Havens 2023 U.S. Geological Survey Scientific Investigations Map 3490 Data release available at https://doi.org/10.5066/P9PGUZV0 ABSTRACT: 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. DISCLAIMERS: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty, expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Although this information product, for the most part, is in the public domain, it also may contain copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. ---------------------------------------------------------------------------- FILES: The map sheets can be downloaded via the Web from the U.S. Geological Survey publications website at https://doi.org/10.3133/sim3490. The map sheets are in an Adobe Portable Document Format (PDF) (sim3490_sheet1.pdf and sim3490_sheet2.pdf) from which paper copies may be printed. The geospatial PDF (sim3490_sheet1_georeferenced.pdf) has preserved the original layering of the map and, if a PDF reader like Adobe Acrobat Pro is used, these layers can be individually toggled "on" and "off" to change the visible information in the file. This capability as well as the "Measuring Tool" with the "Object Data" and "Geospatial Location" tools will function if the file has been downloaded (functionality can't be guaranteed if opened in an internet browser). Note that the basemap layer is above the geologic unit polygon layer and effectively blocks the polygon layer. Because of this ordering, the basemap layer needs to be turned "off" when the "Object Data Tool" is used. Acrobat software runs on a variety of systems, and is available for download free of charge from Adobe at http://www.adobe.com. MAP FILES: sim3490_sheet1.pdf sim3490_sheet1_georeferenced.pdf sim3490_sheet2.pdf sim3490_pamphlet.pdf 00ReadMe.txt ---------------------------------------------------------------------------- The GIS database for this report is located at and can be downloaded via the Web from ScienceBase at https://doi.org/10.5066/P9PGUZV0 HOW TO OBTAIN THE DIGITAL MAP FILES: The map sheets can be obtained via the Internet from the U.S. Geological Survey publications website. Go to the web page at https://doi.org/10.3133/sim3490 and follow the directions to download the files. PUBLICATION REFERENCE: Page, W.R., Bultman, M.W., Berry, M.E., Turner, K.J., Menges, C.M., Gray, F., Paces, J.B., VanSistine, D.P., Morgan, L.E., and Havens, J.C., 2023, Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona: U.S. Geological Survey Scientific Investigations Map 3490, 2 sheets, scale 1:50,000, 73-p. pamphlet, https://doi.org/10.3133/sim3490. HOW TO OBTAIN THE DIGITAL GIS FILES: The digital GIS files constituting the geologic map database of this report can be obtained from the U.S. Geological Survey via the Internet from ScienceBase: ScienceBase link: https://doi.org/10.5066/P9PGUZV0 DATA RELEASE REFERENCE: Page, W.R., Bultman, M.W., Berry, M.E., Turner, K.J., Menges, C.M., Gray, F., Paces, J.B., VanSistine, D.P., Morgan, L.E., and Havens, J.C., 2023, Database for the geologic map of the upper Santa Cruz River basin, southern Arizona: U.S. Geological Survey data release, https://doi.org/10.5066/P9PGUZV0. Other associated data for this publication: Bultman, M.W., 2023, Sopori Wash sub-basin gravity data, Pima and Santa Cruz Counties, Arizona: U.S. Geological Survey data release, https://doi.org/10.5066/P9MBNX4O. Morgan, L.E., 2021, Argon data for Santa Cruz Basin, Arizona (ver. 1.1, November 2022): U.S. Geological Survey data release, accessed December 1, 2022, at https://doi.org/10.5066/P94NR0D9. Paces, J.B., 2021, Sr-, U-, H- and O-isotope data used to evaluate water sources in the Potrero Creek wetlands, upper Santa Cruz basin, southern Arizona, USA: U.S. Geological Survey data release, accessed January 5, 2022, at https://doi.org/10.5066/P9XXW25T. ArcReader may be downloaded free of charge from http://www.esri.com/software/arcgis/arcreader/download for viewing additional files included in this report. This map is offered as an online-only, digital publication. Users should be aware that, because of differences in rendering processes and pixel resolution, some slight distortion of scale may occur when viewing it on a computer screen or when printing it on an electronic plotter, even when it is viewed or printed at its intended publication scale.