Identification_Information: Citation: Citation_Information: Originator: William R. Page Originator: D. Paco VanSistine Originator: Kenzie J. Turner Publication_Date: 2005 Title: Preliminary Geologic Map of Southernmost Texas, United States, and parts of Tamaulipas and Nuevo Leon, Mexico: Environmental Health Investigations in the United States-Mexico Border Region Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open File Report (OFR) Issue_Identification: OFR 2005-1409 Publication_Information: Publication_Place: Denver, Colorado, USA Publisher: United States Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2005/1409 or http://borderhealth.cr.usgs.gov Description: Abstract: The geologic map covers the southernmost part of Texas (parts of Jim Hogg, Brooks, Starr, Hidalgo, Zapata, Willacy, Kenedy, and Cameron Counties), and parts of Nuevo Leon and Tamaulipas, Mexico. Geologic units become younger from west to east across the map area. The oldest rocks are in the western part of the map area in the states of Nuevo Leon and Tamaulipas, Mexico, and include mostly Cretaceous and Jurassic marine limestone, sandstone, shale, and evaporite units exposed in a series of north to northwest-trending ranges. These rocks are highly folded and are part of the Sabinas foldbelt (Ewing, 1991), a compressional terrain which formed during the Laramide (Cretaceous to Paleocene) due to complex interactions related to subduction of the Pacific plate beneath North America. The Mesozoic rocks were intruded by Miocene and Oligocene igneous rocks. The central and eastern portions of the map cover the Gulf Coastal Plain province extending across southern Texas and Tamalupias and Nuevo Leon, Mexico. Rocks in central part of the map area are Tertiary units consisting mostly of sandstone, shale, and claystone units deposited in mixed marine and continental environments. These Paleocene to Pliocene rocks dip east and formed as a result of rapid deposition and progradation of sediments across the continental margin into the Gulf of Mexico. The rapid infilling resulted in the development of syndepositional growth faults which formed episodically from Paleocene to the Pliocene. The growth faults (Ewing, 1986) are concealed beneath Pliocene and Quaternary deposits and form a structurally complex Gulf Coast Tertiary basin. Tertiary bedrock units are important because they contain oil and gas resources in south Texas and in Tamaulipas, Mexico (Burgos basin), and uranium deposits in the South Texas Uranium District (Galloway and others, 1979; Eargle and others, 1971; Henry and Kapadia, 1980). In addition, some of these rocks also are aquifers for ground water in the region. Rocks bordering the Gulf of Mexico are the youngest units in the map area consisting mostly of Quaternary and modern coastal deposits in deltaic, tidal flat, beach, barrier island, lagoonal, esturary, and dune environments (Brown and others, 1980). Purpose: The primary purpose of this map is to provide an integrated, bi-national, digital, geologic map dataset for display and analyses on an ArcIMS website related to studies of environmental health issues in southern Texas and northeast Mexico. The website is being prepared by members of a USGS project titled "Environmental Health studies in the US-Mexico Border Region" (USGS, 2004). The website address is http://borderhealth.cr.usgs.gov. The geologic map is just one of many datasets included in the website; other datasets include biologic, hydrologic, and geographic, and human health themes. Supplemental_Information: geodatabase - mextexgeol.mdb coverages - mextexfld, mextexflt, mextexgeo, mextexgrth, mextexpnt Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: Map data will be updated once more with new satellite data when acquired. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -100.513123 East_Bounding_Coordinate: -96.965838 North_Bounding_Coordinate: 27.014200 South_Bounding_Coordinate: 24.989907 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Bi-national geologic map Theme_Keyword: digital geologic map Theme_Keyword: Gulf coastal plain Theme_Keyword: Sabinas fold belt Theme_Keyword: environmental health Place: Place_Keyword_Thesaurus: U.S. board on Geographic Names Place_Keyword: Southern Texas Place_Keyword: Tamaulipas, Mexico Place_Keyword: Nuevo Leon, Mexico Access_Constraints: None. Use_Constraints: None. Acknowledgement of the U.S. Geological Survey would be appreciated. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William R. Page Contact_Organization: U.S. Geological Survey Contact_Voice_Telephone: 303-236-1141 Contact_Electronic_Mail_Address: rpage@usgs.gov Contact_Address: Address_Type: mailing address Address: Denver Federal Center Mailstop 980 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Data_Set_Credit: We thank Tom Tremblay and the Bureau of Economic Geology, Austin, Texas, for providing digital files of the McAllen-Brownsville Geologic Atlas Sheet. We are grateful to INEGI (Instituto Nacional De Estadistica Geografia Informatica) for partnering with the USGS by providing digital files of the Monclova, Rio Bravo, Reynosa, and Matomoros geologic quadrangles, Mexico. Thanks to Dr. Gene Paull and students of the University of Texas Brownsville, for their help in digitizing parts of this integrated geologic map. Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered by GIS technician and checked by the geologist that made the field observations. Logical_Consistency_Report: 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 (ArcInfo) 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. Completeness_Report: Data are complete: no features that could be accurately represented at the compilation scale were eliminated or generalized. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy is tested by visual comparison of hard copy test plots to source maps or comparing locations of data on a computer monitor to other data layers in the same geographic area. Accuracy of these digital data indirectly depends on accuracy of the base maps on which the original source geologic maps were compiled. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Bureau of Economic Geology Title: Geologic Atlas of Texas, McAllen-Brownsville Sheet Publication_Date: 1976 Series_Information: Series_Name: Bureau of Economic Geology Geologic Atlas Series Issue_Identification: unknown Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bureau of Economic Geology (1976) Source_Contribution: geology Source_Scale_Denominator: 250,000 Source_Information: Source_Citation: Citation_Information: Originator: Dodge, M.M. Originator: Posey, J.S. Title: Structural cross sections, Tertiary formations, Texas Gulf Coast Publication_Date: 1981 Series_Information: Series_Name: Bureau of Economic Geology Issue_Identification: unknown Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1981 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Dodge and Posey (1981) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Eargle, D.H. Originator: Hinds, G.W. Originator: Weeks, Alice Title: Uranium geology and mines, south Texas Publication_Date: 1971 Series_Information: Series_Name: Bureau of Economic Geology Guidebook Issue_Identification: No. 12 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1971 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Eargle and others (1971) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Brown, L.F., Jr. Originator: Brewton, J.L Originator: Evans, T.J. Originator: McGowen, J.H. Originator: White, W.A. Originator: Groat, C.G. Originator: Fisher, W.L. Title: Environmental Geologic Atlas of the Texas Coastal zone-Brownsville-Harlingen area Publication_Date: 1980 Series_Information: Series_Name: Bureau of Economic Geology Issue_Identification: unknown Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1980 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Brown and others (1980) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Ewing, T.E. Title: Structurtal styles of the Wilcox and Frio growth fault trends in Texas: constraints on geopressured Reservoirs Publication_Date: 1986 Series_Information: Series_Name: Bureau of Economic Geology Report of Investigations Issue_Identification: No. 154 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Ewing (1986) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Ewing, T.E. Title: The Tectonic framework of Texas Publication_Date: 1991 Series_Information: Series_Name: Bureau of Economic Geology Tectonic Map of Texas Issue_Identification: unknown Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Ewing (1991) Source_Contribution: geology Source_Scale_Denominator: 750,000 Source_Information: Source_Citation: Citation_Information: Originator: Galloway, W.E. Originator: Finley, R.J. Originator: Henry, C.D. Title: South Texas uranium province, geologic perspective Publication_Date: 1979 Series_Information: Series_Name: Bureau of Economic Geology Guidebook Issue_Identification: No. 18 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1979 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Galloway and others (1979) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Humphrey, W.E. Originator: Diaz, Teodoro Title: Jurassic and Lower Cretaceous stratigraphy and tectonics of northeast Mexico Publication_Date: 2003 Series_Information: Series_Name: Bureau of Economic Geology Report of Investigations Issue_Identification: No. 267 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Humphrey and Diaz (2003) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Henry, C.D. Originator: Kapadia, R.R. Title: Trace elements in soils of the south Texas Uranium district: concentrations, origin, and environmental significance Publication_Date: 1980 Series_Information: Series_Name: Bureau of Economic Geology Report of Investigations Issue_Identification: No. 101 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1980 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Henry and Kapadia (1980) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: USGS Title: Science data in support of Environmental health studies in the US-Mexico border region Publication_Date: 2004 Series_Information: Series_Name: U.S. Geological Survey Fact Sheet Issue_Identification: 2004-3013 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USGS (2004) Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: INEGI Title: Geologic map of the Matomoros quadrangle, Mexico Publication_Date: 1982 Series_Information: Series_Name: Instituto Nacional De Estadistica Geografia Informatica Map Sheet Issue_Identification: G14-6-9-12 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: INEGI (1982) Source_Contribution: geology Source_Scale_Denominator: 250,000 Source_Information: Source_Citation: Citation_Information: Originator: INEGI Title: Geologic map of the Rio Bravo quadrangle, Mexico Publication_Date: 1982 Series_Information: Series_Name: Instituto Nacional De Estadistica Geografia Informatica Map Sheet Issue_Identification: G14-8 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: INEGI (1982) Source_Contribution: geology Source_Scale_Denominator: 250,000 Source_Information: Source_Citation: Citation_Information: Originator: INEGI Title: Geologic map of the Reynosa Quadrangle, Mexico Publication_Date: 1983 Series_Information: Series_Name: Instituto Nacional De Estadistica Geografia Informatica Map Sheet Issue_Identification: G14-5 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: INEGI (1983) Source_Contribution: geology Source_Scale_Denominator: 250,000 Source_Information: Source_Citation: Citation_Information: Originator: INEGI Title: Geologic map of the Monclova quadrangle, Mexico Publication_Date: 1991 Series_Information: Series_Name: Instituto Nacional De Estadistica Geografia Informatica Map Sheet Issue_Identification: G14-4 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: INEGI (1991) Source_Contribution: geology Source_Scale_Denominator: 250,000 Process_Step: Process_Description: The map was compiled by integrating geologic unit polygons, lines, and point data from the McAllen-Brownsville (Bureau of Economic Geology, 1976), Matamoros (INEGI, 1982a), Rio Bravo (INEGI, 1982b), Reynosa (INEGI, 1983), and Monclova (INEGI, 1991) 1:250,000-scale quadrangles. The integration process used USGS map formatting standards to establish stratigraphic and structural consistency between the 5 quadrangles. The attribute tables include 5 columns: map symbol; source map symbol; unit name; unit age; and unit description. The map symbol column includes map symbols redefined from the source map symbols in order to develop a consistent scheme. The capitalized first letter of the map symbol represents geologic period; "Q" for Quaternary, "T" for Tertiary, "K" for Cretaceous, and "J" for Jurassic. Column 2 includes the source map symbol as a guide in visualizing how the new units relate to the source map units. In some cases, the new symbols are the same as the source map symbols, but in general, most units were assigned new symbols for consistency. Column 3 is unit name, designated by the lowercase second part of the map symbol and derived from the formal formation or group, or informal general rock type, such as Pliocene conglomerate. The unit names are generally unchanged, and were derived directly from the source maps. Column 4 is unit age, which was also directly derived from the source maps. Column 5 is unit description. These lithologic descriptions are abbreviated versions from the source maps, and for greater detail on units, the reader is referred to the original source maps. Map unit polygons were essentially unchanged from the source maps except for one unit in the western part of the study area in the Monclova 1:250,000-scale quadrangle, Mexico. Source map unit Ki(lu-ar) was combined with unit Ki(cz) because of overlap between the two units, and the new assigned symbol is Kwt (Lower Cretaceous Washita Group-Taraises Formation). We interpreted only one direct map unit correlation between the Mexican and US map datasets. Source map unit To(lu-ar) (Mexico) and MOcf (US) both include the Catahoula, Frio, and Vicksburg Formations, and were combined into one unit redefined as Tcv. The Vicksburg Formation was not identified as part of MOcf on the Texas map, but well data in this area (Dodge and Posey, 1981) indicate the Vicksburg Formation is present in the subsurface and we subsequently included it with map unit Tcv. The Goliad Formation (Pliocene) is interpreted to conceal surface outcrops of the Flemming Formation and Oakville Sandstone (Tfo) in southernmost Texas. This is based on relations that show a north-trending sequence of Tfo in Tamaulipas projecting northward beneath the Goliad Formation in Starr and Jim Hogg Counties, Texas, and the reappearance of Tfo further north in Duval County, Texas. Geologic line (structures including faults, folds, and dikes) and point (strike and dip) data are essentially unchanged from the source map versions, although we added the system of Paleocene to Pliocene growth faults of Ewing (1991). These are buried faults in the Gulf Coastal Plain that formed due to progradation and rapid deposition and infilling of sediment into the Gulf of Mexico. Although concealed, these faults are important in controlling the geometry of geopressured oil, gas, and ground-water aquifers in the region. It should be noted that the traces of these faults were digitized from a much smaller-scale map (1:750,000-scale) and so their positions on the 1:250,000-scale map should be qualified as concealed and approximately located. Process_Date: 2004 Process_Step: Process_Description: datasets were joined, reclassed and clipped to create a continuous bi-national dataset. Process_Date: 2004 Process_Step: Process_Description: metadata was created for the final dataset. Process_Date: 2005 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 9204 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 106 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 525 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 146 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 438 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 4680 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 14 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -99.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000264 Ordinate_Resolution: 0.000264 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: GEOLOGIC UNIT SUMMARY (mextexgeol) SYMBOL DESCRIPTION FS Artificial fill and spoil Jlc La Casita Group Jm Minas Viejas Formation Jz Zuloaga Group Kae Austin and Eagle Ford Formations, undivided Km Mendez Shale Kwt Washita Group, Kiamichi Formation, Aurora Limestone, La Pena, Cupido, and Taraises Formations, undiv QTu Uvalde Gravel Qa Quaternary alluvium, undivided Qal Holocene alluvium, undivided Qam Muddy flood-plain alluvium Qas Silty and sandy flood-plain alluvium Qb Beaumont Formation, undivided Qbf Beaumont Formation, flood-plain deposits Qbi Barrier island deposits Qbm Beaumont Formation, clay and mud Qcd Clay dune and clay to sand dune deposits Qcg Quaternary conglomerate Qds Stabilized sand dunes Qeo Eolian deposits Ql Lissie Formation Qla Coastal lacustrine deposits Qli Littoral deposits Qs Sand sheet deposits Qsd Active dunes on mainland Qt Terrace deposits Qtf Tidal flat deposits Tbr Tertiary breccia Tc Caliche Tcg Pliocene conglomerate Tcgl Oligocene conglomerate Tcv Catahoula, Frio, and Vicksburg Formations, undivided Td Diorite Tfo Fleming Formation and Oakville Sandstone, undivided Tg Goliad Formation, undivided Tgc Goliad Formation, caliche Tgd Granodiorite Tj Jackson Group Tjw Jackson, Claiborne, and Wilcox Groups, undivided Tl Tertiary limestone Tla Laredo Formation Tli Miocene limestone Tm Midway Group, undivided Tmz Monzonite Tsc Miocene sandstone and conglomerate Tscg Pliocene sandstone and conglomerate Tsi Syenite Ttr Tertiary travertine Ty Yegua Formation water FAULT TYPE SUMMARY (mextexflt) DESCRIPTION dike fault-certain fracture normal fault-approximately located normal fault-certain reverse fault-certain study boundary FOLD TYPE SUMMARY (mextexfld) DESCRIPTION anticline-approximately located anticline-certain anticline-concealed doubly plunging anticline-certain doubly plunging syncline-certain doubly plunging syncline-concealed plunging anticline-approximately located plunging anticline-certain plunging anticline-concealed plunging syncline-certain plunging syncline-concealed recumbent anticline-certain recumbent syncline-certain study boundary syncline-approximately located syncline-certain syncline-concealed POINT FEATURE SUMMARY (mextexpnt) DESCRIPTION inclined bedding-showing strike Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Voice_Telephone: 303-236-5486 Contact_Address: Address_Type: mailing address Address: Central Publications Group City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: United States Distribution_Liability: Although this digital spatial database has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government nor any agency thereof, nor any employees thereof, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE,SHP File_Decompression_Technique: GZIP TAR archive, In UNIX use the command "gunzip -c | tar xvf -" In Windows, use WinZip (http://www.winzip.com/) or other programs to extract the file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2005/1409 or http://borderhealth.cr.usgs.gov Fees: none Metadata_Reference_Information: Metadata_Date: 2005 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Paco VanSistine Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Denver Federal Center MS-980 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5452 Contact_Electronic_Mail_Address: dsistine@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile