Identification_Information: Citation: Citation_Information: Originator: Robert G. Bohannon Publication_Date: 2010 Title: Geologic Map of the Chisos Mountains, Big Bend National Park, Texas Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: SIM 3140 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: pubs.usgs.gov/3140 Description: Abstract: This report describes the geology of the Chisos Mountains in the central part of Big Bend National Park, Brewster County, Texas. The compilation summarizes and integrates new geologic mapping and stratigraphic studies with various topical studies and geologic maps that were published between the late 1960’s and 2006. The geology was mapped in the field during the Fall and Spring months of 2003 through 2006 on color-infrared air photographs at 1-m resolution. Purpose: The purpose of the work is to summarize the geology of the Chisos Mountains, one of the most highly visited areas in Big Bend National Park. Although a geologic map of an earlier vintage exists (Maxwell and others, 1967), the new map included in this report displays the geology in far greater detail at 1:50,000-scale, and it is plotted on a scale-stable, geo-registered base keyed to a modern grid based on the WGS-84, UTM-zone-13 coordinate system. This map and report are also designed to serve as detailed extensions of the contemporary regional geologic map of the entire Big Bend National Park at 1:100,000-scale. Supplemental_Information: Feature Classes in this GeoDatabase: CHISOS_GEOL_LINE - line features(contacts, faults, dikes etc) CHISOS_GEOL_POLY - polygon features(rock units, water bodies etc.) CHISOS_GEOL_LABEL - polygon feature labels CHISOS_GEOL_FOLDS - fold line features(anticline, syncline etc.) CHISOS_GEOL_PNTS - point features(bedding, sample locations etc.) CHISOS_GEOL_CONCEALED - buried, concealed linear features Most of the geologic interpretations are the work of the author. But, some of the data came from a variety of sources including several geologists from the U.S. Geological Survey (USGS), University of Texas at Austin (UTA), and Texas Tech University (TTU). Parts of the map also benefited from field studies conducted by several other USGS geologists including Robert Scott, Lawrence Snee, and Kenzie Turner. Tom Lehman (UTA and TTU) and Ric Page (USGS) conducted regional studies of the Cretaceous and lower Paleogene deposits throughout Big Bend National Park, and all deposits of that age that are shown on this map follow their designations. The surficial deposits (rocks of Quaternary age) of Big Bend have been studied to various degrees by Margaret Berry and Van Williams and this map reflects their work. Dan Miggins (USGS and UTEP) provided age and petrographic data for specific sites over much of the area. Cartography for roads and trails was provided by GIS specialists at the USNPS Park Headquarters in Big Bend. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -103.379269 East_Bounding_Coordinate: -103.145651 North_Bounding_Coordinate: 29.345797 South_Bounding_Coordinate: 29.071983 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Cretaceous Theme_Keyword: Paleogene Theme_Keyword: Paleocene Theme_Keyword: Eocene Theme_Keyword: Oligocene Theme_Keyword: Miocene Theme_Keyword: Cretaceous Seaway deposits Theme_Keyword: Laramide orogeny Theme_Keyword: Chisos Formation Theme_Keyword: Caldera Theme_Keyword: eruptive center Theme_Keyword: Basin-and-Range Theme_Keyword: extensional tectonism Theme_Keyword: volcanism Theme_Keyword: sedimentation Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Texas Place_Keyword: Brewster County Place_Keyword: Big Bend National Park Place_Keyword: Chisos Mountains Place_Keyword: Fresno Creek Place_Keyword: Smokey Creek Place_Keyword: The Basin Place_Keyword: Sierra Quemada Place_Keyword: Punta de la Sierra Place_Keyword: Rio Grande Place_Keyword: Panther Junction Place_Keyword: Ward Mountain Place_Keyword: Dominguez Mountain Place_Keyword: Pine Canyon Access_Constraints: none Use_Constraints: Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bob Bohannon Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS, MS 980, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 303-236-1235 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: bbohannon@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2011/3140/3140.pdf Browse_Graphic_File_Description: Graphical representation of the map Browse_Graphic_File_Type: pdf Data_Set_Credit: This map was produced under the partial auspices of the United States National Park Service (USNPS). Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered by GIS technician and authors 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 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. Completeness_Report: Data are complete: no features that could be accurately represented at the compilation scale were eliminated or generalized. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Geologic contacts mapped using 1 meter color-infrared air photographs Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Maxwell, R.A. Originator: Lonsdale, J.T. Originator: Hazzard, R.T. Originator: Wilson, J.A. Publication_Date: 1967 Title: Geology of Big Bend National Park, Brewster County, Texas Series_Information: Series_Name: Bureau of Economic Geology, University of Texas Issue_Identification: 320p Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Contribution: geologic features Process_Step: Process_Description: Lines were digitized on color-infrared air photographs at 1-m resolution using Adobe Illustrator with MaPublisher. Process_Date: 2009 Process_Step: Process_Description: Draft 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. Process_Date: 2010 Process_Step: Process_Description: Metadata created. Process_Date: 2010 Process_Step: Process_Description: The database files, metadata, and check plots were edited by the USGS Enterprise Publishing Network, and revisions made to the geospatial database as needed. Process_Date: 2010 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -105.000000 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: 0.000100 Ordinate_Resolution: 0.000100 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000100 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Feature Classes in this GeoDatabase: CHISOS_GEOL_LINE - line features(contacts, faults, dikes etc) CHISOS_GEOL_POLY - polygon features(rock units, water bodies etc.) CHISOS_GEOL_LABEL - polygon feature labels CHISOS_GEOL_FOLDS - fold line features(anticline, syncline etc.) CHISOS_GEOL_PNTS - point features(bedding, sample locations etc.) CHISOS_GEOL_CONCEALED - buried, concealed linear features CHISOS_GEOL_POLY: UNIT AGE AGE_ORDER DESCRIPTION1 DESCRIPTION2 ERA PERIOD EPOCH RADIOMETRIC UNIT DESCRIPTION1 DESCRIPTION2 Kag Marine seaway deposits Aguja Formation Kaghf Marine seaway deposits Aguja Formation Kags Marine seaway deposits Aguja Formation Kb Marine seaway deposits Boquillas Formation Kj Marine seaway deposits Javelina Formation Kp Marine seaway deposits Pen Formation QTa Surficial deposits Extremely old alluvium Qc Surficial deposits Colluvium and colluvial fans Qe Surficial deposits Eolian sand Qia Surficial deposits Intermediate age alluvial deposits Qia1 Surficial deposits Intermediate age alluvial deposits Qia2 Surficial deposits Intermediate age alluvial deposits Qlb Surficial deposits Landslide deposits Qlc Surficial deposits Landslide deposits Qlg Surficial deposits Landslide deposits Qlj Surficial deposits Landslide deposits Qlp Surficial deposits Landslide deposits Qls Surficial deposits Landslide deposits Qlt Surficial deposits Landslide deposits Qlu Surficial deposits Landslide deposits Qoa Surficial deposits Old Alluvium Qrf Surficial deposits Rock fall deposits Qs Surficial deposits Spring deposits Qya Surficial deposits Alluvium Qya1 Surficial deposits Alluvium Qya2 Surficial deposits Alluvium TKbp Marine seaway deposits Black Peaks Formation Tcbr Chisos Formation and equivalent volcanic rocks Breccia facies Tcks Chisos Formation and equivalent volcanic rocks Lower siltstone facies Tckss Chisos Formation and equivalent volcanic rocks Tuffaceous sandstone facies Tcksu Chisos Formation and equivalent volcanic rocks Upper siltstone facies Tcl Chisos Formation and equivalent volcanic rocks Lacustrine facies Tcnr Chisos Formation and equivalent volcanic rocks Nodular rhyolite tuff Tcrt Chisos Formation and equivalent volcanic rocks Rhyolite tuff facies Tcss Chisos Formation and equivalent volcanic rocks Undifferentiated sandstone facies Tcstr Chisos Formation and equivalent volcanic rocks Sandstone, tuff, and rhyolite facies Tcwt Chisos Formation and equivalent volcanic rocks White tuff facies Tcwtu Chisos Formation and equivalent volcanic rocks Upper white tuff facies Tcyot Chisos Formation and equivalent volcanic rocks Yellow-orange tuffaceous sandstone Tdds Flows and intrusions of the eruptive and intrusive episodes Dominguez Mountain dike swarm Tdr Flows and intrusions of the eruptive and intrusive episodes Rhyolite dikes of Sierra Quemada Tdsm Flows and intrusions of the eruptive and intrusive episodes Mafic dikes and sills Tdsq Flows and intrusions of the eruptive and intrusive episodes Sierra Quemada dike complex Tdsrp Flows and intrusions of the eruptive and intrusive episodes Rhyolite porphyry dikes and sills Tebr Flows and intrusions of the eruptive and intrusive episodes Breccia Teeb Flows and intrusions of the eruptive and intrusive episodes Explosion breccia Terf Flows and intrusions of the eruptive and intrusive episodes Rhyolite flow Tesbr Flows and intrusions of the eruptive and intrusive episodes South Rim Formation Teslm Flows and intrusions of the eruptive and intrusive episodes South Rim Formation Tespc Flows and intrusions of the eruptive and intrusive episodes South Rim Formation Tesre Flows and intrusions of the eruptive and intrusive episodes Rocks equivalent to South Rim Formation Tetc Flows and intrusions of the eruptive and intrusive episodes Tuff and conglomerate Tetps Flows and intrusions of the eruptive and intrusive episodes Trachyte flows of Punta de la Sierra Tfacb Chisos Formation and equivalent volcanic rocks Ash Spring Basalt Member Tfasb Chisos Formation and equivalent volcanic rocks Alamo Creek Basalt Member Tfbmb Chisos Formation and equivalent volcanic rocks Bee Mountain Basalt Member Tfbu Chisos Formation and equivalent volcanic rocks Basalt flows, undifferentiated Tfdb Flows and intrusions of the eruptive and intrusive episodes Young basalt flows at Dominguez Mountain Tfdmt Flows and intrusions of the eruptive and intrusive episodes Dominguez Mountain flows Tfra Chisos Formation and equivalent volcanic rocks Rhyolite ash flow Tfvt Chisos Formation and equivalent volcanic rocks Vitric tuff Tigr Flows and intrusions of the eruptive and intrusive episodes Granite Tii Flows and intrusions of the eruptive and intrusive episodes Intermediate to mafic intrusion Tim Flows and intrusions of the eruptive and intrusive episodes Mafic intrusions of Pine Canyon caldera and Dominguez Mountain Tinm Flows and intrusions of the eruptive and intrusive episodes Nugent Mountain intrusion Tipl Flows and intrusions of the eruptive and intrusive episodes Panther laccolith Tir Flows and intrusions of the eruptive and intrusive episodes Rhyolite intrusions of Sierra Quemada Tirs Flows and intrusions of the eruptive and intrusive episodes Rough Spring laccolith Tiwm Flows and intrusions of the eruptive and intrusive episodes Ward Mountain pluton Tiwma Flows and intrusions of the eruptive and intrusive episodes Altered parts of Ward Mountain pluton Tsbu Flows and intrusions of the eruptive and intrusive episodes Undifferentiated basalt sills Tsf Flows and intrusions of the eruptive and intrusive episodes Felsic sill Tsgb Flows and intrusions of the eruptive and intrusive episodes Gabbro sill Tsi Older sills Intermediate sill Tsm Older sills Mafic sill CHISOS_GEOL_LINE: DESCRIPTION DESCRIPTION Contact-Certain Leucocratic dike-Certain Mafic intermediate dike-Certain Map Border Mass movement sole and related fault-Certain Normal or oblique-slip fault-Approximately located Normal or oblique-slip fault-Certain CHISOS_GEOL_PNTS: DESCRIPTION ROTATION AZIMUTH DIP DESCRIPTION Horizontal bedding Inclined bedding-Showing strike and dip CHISOS_GEOL_FOLDS: DESCRIPTION DESCRIPTION Anticline-Certain Syncline-Certain CHISOS_GEOL_CONCEALED: DESCRIPTION DESCRIPTION Mass Movement Sole & Related Fault, Concealed Normal or Oblique-Slip Fault, Concealed Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services, Box 25046 City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Scientific Investigations Map-2011-3140 Distribution_Liability: This database, identified as SIM 3140, 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 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. Standard_Order_Process: Non-digital_Form: Availabe as printed oversize map plate. Order from USGS at address above or see for more ordering information. Fees: For current charges please see website http://store.usgs.gov Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Enterprise Publishing Service Network Address: U.S. Geological Survey, MS 902, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-5486 Resource_Description: Scientific Investigations Map-2011-3140 Distribution_Liability: This database, identified as SIM 3140, 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Geodatabase, Shapefile Format_Version_Number: Arc 9.2 File_Decompression_Technique: GZIP compressed TAR file (Unix), ZIP archive (Windows) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3140 Fees: none Metadata_Reference_Information: Metadata_Date: 2010 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 Address: MS 980 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5452 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: dvansistine@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile