Faults in the Central Texas Study Area, Western part of the Gulf Coast Coal-Bearing Region (cen

United States Geological Survey (USGS) 2011 Faults in the Central Texas Study Area, Western part of the Gulf Coast Coal-Bearing Region (cen_geof.shp) vector digital data Tulsa, OK American Association of Petroleum Geologists U.S. Geological Survey 2011 Geologic Assessment of Coal in the Gulf of Mexico Coastal Plain, U.S.A. AAPG Discovery Series/AAPG Studies in Geology No.14/No. 62 Tulsa, OK American Association of Petroleum Geologists cen_geof withheld AAPG Discovery Series/AAPG Studies in Geology No. 14/No. 62 The western part of the Gulf Coast coal-bearing region is part of the Gulf Coast area that was selected for assessment by the National Coal Resource Assessment project. The geologic faults of western part of the Gulf Coast coal-bearing region was digitized so that we could use the geology and geologic structures as a guide to help delineate the near-surface coal-bearing regions of the area. The purpose of digitizing the geologic map was to allow us to have a geologic base on which to tie stratigraphic and structural correlations of coal beds and coal-bearing strata. Geologic features are shown on the the map to show their proximity to the near-surface coal-bearing areas. en 2011 publication date Complete None planned -98.0000 -94.1993 32.0011 29.5007 -98.000000 -94.199333 29.500679 32.001106 None Geology Coal Faults None Texas Anderson County, TX Angelina County, TX Bastrop County, TX Brazos County, TX Burleson County, TX Caldwell County, TX Cherokee County, TX Falls County, TX Fayette County, TX Freestone County, TX Grimes County, TX Hill County, TX Houston County, TX Jasper County, TX Lee County, TX Leon County, TX Limestone County, TX Madison County, TX Milam County, TX Nacodoches County, TX Polk County, TX Robertson County, TX San Augustine County, TX San Jacinto County, TX Shelby County, TX Travis County, TX Trinity County, TX Tyler County, TX Walker County, TX Waller County, TX Washington County, TX Williamson County, TX None None Peter D. Warwick USGS Geologist mailing and physical address

U.S. Geological Survey MS 956 National Center 12201 Sunrise Valley Drive

Reston Virginia 20192 USA (703) 648-6469 pwarwick@usgs.gov ESRI ArcCatalog 9.3.1.3000 Shapefile The geologic attributes are combinations of those used on the original geologic source map. The assumption was made that the original geologic features were 500000, and that the original geologic attributions on the source map were correct. The digitized geologic features were overlain on the geologic source map and checked for errors, and the errors were corrected in the digital file using ArcEdit. The geologic features of the entire coal-bearing region of the western part of the Gulf Coastal Plain was digitized from the source maps. A visual comparison was made between paper copies of the digital geologic map and the source map. The horizontal accuracy of the boundaries should not be considered accurate at 500000. USGS 19801025 Map 500000 paper 1992 publication date n/a n/a The original geologic features and a series of latitude-longitude points of the source maps were scanned by a USGS contractor (Geologic Data Systems, Inc., Denver, CO) using a large-format scanner to produce an image file. The image files were converted into an Arc Grid, and then into an Arc Vector coverages. The coverages were then transformed into a world geographic projection. Geologic polygons were attributed with a scheme to follow that on the source maps. Once the completed Arc coverages arrived at the USGS from the contractor, project staff edited the coverages using ArcEdit, so that a uniform geologic nomenclature would exist across the region, and so that the coverage would follow USGS digital map standards. The data was originally published by the Bureau of Economic Geology, The University of Texas at Austin as Miscellaneous Maps 41, 2 sheets 1:500,000. The data were extracted from that publication and reproduced here. 1997 withheld The data were extracted from the following publication and reproduced here: Warwick, P.D., Aubourg, C.A., Hook, R.W., and SanFilipo, J.R. (compilers), Morrissey, E.C., Schultz, A.C., Karlesen, A.W., Watt, C.S., Podwysocki, S.M., Mercier, T.J., Wallace, W.C., Tully, J.K., Sun, Zhuang, and Newton, Mathew (digital compilers), 2002, Geology and land use in the western part of the Gulf Coast Coal-bearing Region: Bureau of Economic Geology, The University of Texas at Austin Miscellaneous Maps 41, 2 sheets 1:500,000 scale and CD-Rom. withheld 2003 Vector Simple FALSE 0 TRUE FALSE cen_geof.dbf Polygon Attribute Table none Feature Class 0 OBJECTID FID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 8 0 0 Feature geometry. ESRI Coordinates defining the features. FNODE_ FNODE_ Double 8 38 8 TNODE_ TNODE_ Double 8 38 8 LPOLY_ LPOLY_ Double 8 38 8 RPOLY_ RPOLY_ Double 8 38 8 LENGTH LENGTH Double 8 38 8 CEN_GEOF_ CEN_GEOF_ Double 8 38 8 CEN_GEOF_I CEN_GEOF_I Double 8 38 8 SYMBOL SYMBOL SmallInteger 2 5 0 SYMBOL_ARC SYMBOL_ARC Integer 4 10 0 Feature Type represents the geologic name of the various geologic features shown on the geologic map. derived from source maps Fault, Fault (ball shows downthrown side), Faults (approximately located),Nomenclature break,Fault (concealed) Fault not atributed,Fault with down-dropped side shown,Faults approximately located,Boundary between nomenclature changes,Concealed faults U.S.Geological Survey FEATURE String 31 0 0 source_organization Source Organization String 255 0 0 dataset_name Dataset Name String 255 0 0 hyperlink Link String 255 0 0 dateupdated Date Last Updated String 255 0 0 source_ID Source ID String 255 0 0 st_length(shape) st_length(shape) Double 0 0 0 American Association of Petroleum Geologists American Association of Petroleum Geologists mailing and physical address

P. O. Box 979

Tulsa OK 74101-0979 USA 1 800 364 2274 1 918 560 2665 Although the data has been processed on the computer system at the U.S. Geological Survey, U.S. Department of the Interior, no warranty, expressed or implied, is made by the Geological Survey regarding the utility of the data on any other system, not shall the act of distribution constitute any such warranty. Downloadable Data 0.076 0.076 2011 2011 Peter D. Warwick U.S. Geological Survey Geologist mailing and physical address

U.S. Geological Survey 956 National Center 12201 Sunrise Valley Drive

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