Skip to main content

Person

Floyd Gray


Geology, Minerals, Energy, and Geophysics Science Center

Email: fgray@usgs.gov
Office Phone: 520-670-5582
ORCID: 0000-0002-0223-8966

Location
UA - ENRB - AZWSC
520 N. Park Ave
Tucson , AZ 85719
US

Supervisor: Lukas Zurcher
Rapid population growth and declining annual recharge to aquifers in the upper Santa Cruz basin area of southern Arizona, has increased the demand for additional groundwater resources. This demand is predicted to escalate in the future due to higher temperatures, longer droughts, less aquifer recharge, and decreased river and stream base flow. We conducted geologic studies to help evaluate and better understand groundwater resources in the basin. Results of these studies are presented in this report, which summarizes the basin geologic framework and hydrogeology, and presents a 3-D hydrogeologic model for the Rio Rico and Nogales 7.5' quadrangles. Three major hydrogeologic units are displayed in the 3-D model; a...
thumbnail
This digital publication contains the database, base maps, and style files used to build the geologic map of the upper Santa Cruz River basin in southern Arizona published in U.S. Geological Survey Scientific Investigations Map 3490 (Page and others, 2023). Shapefiles are also included for the user’s convenience. In the database, there are polygon features outlining the map units and data sources; line features delineating contacts, faults, and other geologic lines such as dikes, anticlines, and synclines; point features marking where there are age or structural data; and nonspatial tables in which the description of map units, data sources, and glossary information can be found. The database follows the geologic...
ScienceBase brings together the best information it can find about USGS researchers and offices to show connections to publications, projects, and data. We are still working to improve this process and information is by no means complete. If you don't see everything you know is associated with you, a colleague, or your office, please be patient while we work to connect the dots. Feel free to contact sciencebase@usgs.gov.