William R. PageChristopher M. MengesFloyd GrayMargaret E. BerryMark W. BultmanMichael A. CoscaD. Paco VanSistine2016Geologic Map of the Rio Rico and Nogales 1:24,000 - Scale Quadrangles, Santa Cruz County, Arizonaversion 1.0mapUSGS Scientific Investigations MapSIM 3354Denver, ColoradoU.S. Geological Surveyhttps://pubs.usgs.gov/sim/2016/3354The Rio Rico and Nogales (Arizona) 1:24,000-scale quadrangles are located in the Basin and Range Province of southern Arizona, and the southern edge of the map is the international border with Sonora, Mexico. The major urban area is Nogales, a bi-national city known as “the gateway to Mexico.” Rocks exposed in the map area range in age from Jurassic through Quaternary. Major physiographic, geologic, and hydrologic features in the map area include the southern San Cayetano Mountains, Grosvenor Hills, and Sonoita Creek in the northern part, and Mount Benedict and the Mount Benedict horst block in the southcentral part. The horst block is bounded by the Santa Cruz River on the east and Nogales Wash (tributary to the Santa Cruz River) on the west.The objectives of our mapping were to define the geologic framework for the Nogales area and the upper Santa Cruz basin (Page and others, 2011; Callegary and others, 2011), to support ongoing multidisciplinary projects. These projects include: the USGS Tucson Water Science Center Transboundary Aquifer Act Project (hydrologic and climatic modeling and water quality and quantity studies of upper Santa Cruz basin); the U.S.-Mexico Border Environmental Health Initiative (evaluating contaminants in the basin and impacts to human and wildlife health); and the assessment of concealed porphyry copper deposits in the region. This work will also provide fundamental data used for flood hazard and water storage investigations in the Nogales Wash and Santa Cruz River areas, and in efforts to detect and predict the location of illegal tunnels beneath the international border. We significantly revised the Miocene Nogales Formation based on geologic mapping combined with new geochronologic, geophysical, and petrographic studies. The Nogales Formation is poorly understood because it has not been mapped in detail, and in turn, its groundwater resource potential is poorly known. This new work will improve understanding of the Nogales Formation to more fully assess its groundwater resource potential (Gray and others, 2014).Compilation scale: 1:24,000
DATASETS INCLUDED IN THIS GEOSPATIAL DATABASE:
GEOLOGY Feature Dataset:
riorico_nogales_poly - geologic unit polygons
riorico_nogales_line - contacts and faults
riorico_nogales_pnt - geologic point features
riorico_nogales_fold - geologic folds
riorico_nogales_geochron - geochronological sample location
riorico_nogales_sections - cross-section lines
riorico_nogales_label - geologic unit polygon label points
Initial steps in compilation of the geologic map dataset included preliminary compilation of the geology of late Miocene to early Pleistocene basin fill and Quaternary alluvium by Margaret E. Berry. William R. Page then integrated the geology of the Nogales Formation and bedrock units with basin-fill and Quaternary alluvium digital compilation. Final step was completed by Christopher Menges who revised the original basin fill and Qaternary alluvium units, subdividing and defining more detailed geology of those units.2016publication dateNone planned-111.0-110.87531.531.333AGI Glossary of GeologyGeologic mappingHydrogeologyGroundwaterUpper Santa Cruz basinUS-Mexico borderStratigraphyStructureU.S. Board on Geographic Names (BGN)Southern ArizonaNogales, ArizonaRio RicoSanta Cruz CountyNational Geologic Map Database Geologic Names LexiconNogales FormationnoneUsers of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data.Ric Pagemailing addressUSGS, MS 980, Box 25046, Denver Federal CenterDenverCO80225303-236-1141303-236-5349rpage@usgs.govhttps://pubs.usgs.gov/SIM/2016Graphical representation of the mapPDFWilliam R. Page digitally compiled the geology of the Nogales Formation and all bedrock units. Margaret E. Berry and Christopher M. Menges digitally compiled the geology for late Tertiary to early Pleistocene basin-fill units and Quaternary alluvium. Jeremy Havens was responsible for digitally drafting all of the report illustrations, and the cross sections on pl. 1. Thanks to Gary Skipp who conducted x-ray diffraction analyses on samples from the Nogales Formation. Paco D. Van Sistine significantly contributed to the digital compilation of the map, created all of the cross section profiles, and assisted authors in creating, editing, and finalizing the digital geologic map database. Ted Brandt digitally compiled, edited, and mosaicked the topographic base map for map plate.Microsoft Windows 7 Enterprise - ArcCatalog Version 10.2.2Attributes were entered digitally and checked by GIS technician. Authors and USGS map editors performed separate reviews.Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. Automated routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards.Data are complete: no features that could be accurately represented at the compilation scale were eliminated or generalized. All geospatial database elements are attributed.Geology was mapped using 1 meter orthophoto imagery.Simons, F.S.1974Geologic map and sections of the Nogales and Lochiel quadrangles, Santa Cruz County, Arizona1.0mapU.S. Geological Survey Miscellaneous Investigations ReportI-762USA, Denver, ColoradoU.S. Geological Survey48000unknown1974publication dateSimons, 1974geologic featuresDrewes, Harald1980Tectonic map of southeast Arizona1.0mapU.S. Geological Survey Miscellaneous Investigations MapI-1109USA, Denver, ColoradoU.S. Geological Survey125000unknown1980publication dateDrewes, 1980geologic featuresDrewes, Harald1972Cenozoic rocks of the Santa Rita Mountains, southeast of Tucson, Arizona1.0mapU.S. Geological Survey Professional Paper746, 66 p.USA, Denver, ColoradoU.S. Geological Surveyunknownunknown1972publication dateDrewes, 1972geologic featuresBedrock geology was digitally mapped in ArcMap (version 9.3.1), with the aid of 2010 National Agriculture Imagery Program (NAIP) orthophotography, imagery viewed with Google Earth, 1996 National Aerial Photography Program (NAPP) 1:40,000-scale color infrared aerial photographs, and 1:24,000 and 1:100,000-scale topographic maps. Mesozoic bedrock units were compiled from existing published geologic maps in the area, including those of Simons (1974), and Drewes (1972, 1980); most bedrock unit descriptions were from these reports with minor modifications, and the location of some contacts and faults were slightly adjusted based on interpretation of orthophotography and imagery viewed with Google Earth. The surficial geology in the map area was compiled from interpretation of stereoscopic pairs of 1996 NAPP color-infrared aerial photography (1:40,000-scale), 2010 NAIP orthophotography, imagery viewed with Google Earth, topographic data, and digital soils data (U.S. Department of Agriculture Natural Resources Conservation Service, 2008), using previous mapping in adjacent areas by Youberg and Helmick (2001) and Helmick (1986) as a guide. The surficial geology was digitally mapped on the NAIP imagery using ArcMap GIS software. Interpretive mapping was constrained by, and unit description and age estimates are based on data collected at GPS-located field stations along a series of traverses. Terrace heights were estimated from 1:24,000-scale topographic maps, DEM data, and for lower (younger) units, local field measurements.2014Draft check plots of the geologic map and explanation were created and submitted for peer review. Geologists reviewed the plots for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Revisions were made to the geospatial database as needed.2015Metadata created by Paco VanSistine2015The database files, metadata, and check plots were edited by the USGS Denver Publishing Service Center, and revisions made to the geospatial database as needed.2015Universal Transverse Mercator120.99960000-111.000.00500000.000.00coordinate pair0.00010.0001metersNorth American Datum of 1983Geodetic Reference System of 1980 (GRS 80)6378137.0298.257222101GEODATABASE:
RIORICO_NOGALES
GEOLOGY Feature Dataset:
riorico_nogales_poly
riorico_nogales_line
riorico_nogales_fold
riorico_nogales_pnt
riorico_nogales_geochron
riorico_nogales_label
riorico_nogales_sections
ATTRIBUTES:
RIORICO_NOGALES_POLY
UNIT DESCRIPTION AGE FORMATION
Jb Biotite-hornblende quartz monzonite Jurassic Mount Benedict
Jbm Quartz monzonite Jurassic Mount Benedict
Kd Diorite UpperCretaceous
Ks Salero Formation Upper Cretaceous
Ql Young intermediate alluvial deposits, undivided late Pleistocene
Ql1 Older of the young intermediate alluvial deposits late Pleistocene
Ql2 Younger of the young intermediate alluvial deposits late Pleistocene
Qlr Young intermediate river-terrace deposits, undivided late Pleistocene
Qlr1 Older of the young intermediate river-terrace deposits late Pleistocene
Qlr2 Younger of the young intermediate river-terrace deposits late Pleistocene
Qm Older intermediate alluvial deposits middle Pleistocene
Qmr Older intermediate river-terrace deposits middle Pleistocene
Qo Old alluvial deposits early Pleistocene
QTa Alluvial basin fill early Pleistocene? to Miocene
Qy Young alluvial deposits, undivided Holocene
Qy1 Older of the young alluvial deposits Holocene
Qy2 Younger of the young alluvial deposits late Holocene
Qycr Active river-channel deposits latest Holocene
Qyr1 Young river terrace deposits Holocene
Qyr2 Young river floodplain and terrace deposits late Holocene
Tgg Gringo Gulch Volcanics Paleocene
Tghm Middle rhyolite member Oligocene Grosvenor Hills Volcanics
Tghu Upper rhyodacite member Oligocene Grosvenor Hills Volcanics
Tnm Mariposa member Miocene Nogales
Tnmb Basalt flow in Mariposa member Miocene Nogales
Tnn Nogales Wash member Miocene Nogales
Tnp Proto Canyon member Miocene Nogales
Tnpd Dacite dike in Proto Canyon member Miocene Nogales
Tr Rhyodacite and rhyolite intrusive rocks Oligocene Grosvenor Hills Volcanics
RIORICO_NOGALES_LINE
DESCRIPTION
Contact - certain
Map boundary
Normal fault - approximately located
Normal fault - certain
Normal fault - concealed
Normal fault - Geophysically inferred
RIORICO_NOGALES_FOLD
DESCRIPTION
Anticline - approximately located
Syncline - approximately located
RIORICO_NOGALES_PNT
DESCRIPTION
Fault dip
Horizontal bedding
Inclined bedding - showing strike and dip
Inclined flow layering - showing strike and dip
Overturned bedding - showing strike and dip
Vertical flow layering - showing strike
DIP
0 - 90 degrees
AZIMUTH
0 - 359 degrees
RIORICO_NOGALES_GEOCHRON
SAMPLE GEOLOGIC_UNIT ARGON_AGE MATERIAL
11SCB01 Nogales Formation 23.6 to 25.09 Ma sanidine, plagioclase
11SCB02 Nogales Formation 24.7+/-0.6 to 25.93 Ma plagioclase
11SCB03 Nogales Formation 23.7 to 25.57 Ma sanidine, plagioclase
11SCB07 Nogales Formation 11.67+/-0.09 Ma whole rock
11SCB08 Nogales Formation 24.9+/-0.2 Ma sanidine, plagioclase
11SCB09 Nogales Formation 25.2+/-0.7 Ma sanidine, plagioclase
12SCB01 Nogales Formation 24.76 Ma sanidine
12SCB03 Grosvenor Hills Volcanics 23.5+/-0.1 to 24.8+/-0.1 Ma biotite
12SCB04 Grosvenor Hills Volcanics 26.3+/-0.7 to 26.9+/-0.2 Ma amphibole
12SCB05 Grosvenor Hills Volcanics 27.6+/-0.4 to 27.8+/-0.3 Ma biotite, amphibolenoneU.S. Geological Surveymailing addressUSGS, Information Services
Box 25286DenverColorado80225-0046USA1-888-ASK-USGSusgsstore@usgs.govScientific Investigations Map-3354Any 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 contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
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 any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.GEODATABASE, SHAPEFILE10.2.2ZIP Archivehttps://pubs.usgs.gov/SIM/2016For current charges please see website http://ask.usgs.gov/prices/faqs_prices_usgs_products.html
or download data at no cost.2015Paco VanSistinemailing addressDenver Federal CenterMailStop 980DenverColorado80225USA303-236-5452303-236-5349dvansistine@usgs.govFGDCFGDC-STD-001-1998nonenone