Jason R. Masoner, David S. Burden, and Tom E. Short 2002 1.0 vector digital data Open-file Report 02-264 Oklahoma City U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?faults This digital data set contains the geologic faults for the 1:250,000-scale Sherman quadrangle, Texas and Oklahoma. The original data are from the Bureau of Economic Geology publication, "Geologic Atlas of Texas, Sherman sheet", by J.H. McGowen, T.F. Hentz, D.E. Owen, M.K. Pieper, C.A. Shelby, and V.E. Barnes, 1967, revised 1991. This data set was created for use in a regional ground-water model for the Lake Texoma watershed, for a project by the U.S. Environmental Protection Agency, National Risk Management Research Laboratory located in Ada, Oklahoma, titled "Development of protocols and decision support tools for assessing watershed system assimilative capacity, in support of risked-based ecosystem management and restoration practices." Although this data set was created for use in a specific project, it may be used to make geologic maps, and determine approximate areas and locations of various geologic units. The file "\stratig.pdf" provides a detailed description of the stratigraphic nomenclature used in this geology data set. Additional digital geology data sets are available for Oklahoma at URL http://ok.water.usgs.gov/public/gis/geology/index.html. The source maps for three counties in the Oklahoma panhandle are at a scale of 1:125,000. The source maps for the rest of Oklahoma are at a scale of 1:250,000. The original geology source map was published in the Transverse Mercator Projection, Zone 14. The resulting geology data set was projected to an Albers Equal Area projection (Synder, 1987). This projection is appropriate for maps of the conterminous United States, because of the visual presentation and equal-area characteristic, which facilitates areal analysis. This projection frequently is used for nationwide digital map data sets. The projection is cast on the North American Datum of 1983. This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. Reviewers were given digital data sets and paper plots for checking against the source maps to verify the linework and attributes. The reviewers were asked to check the metadata and accompanying files for completeness and accuracy. References Cited: Environmental Systems Research Institute, Inc. (ESRI), 2000, ARC/INFO Command References, ARC/INFO Version 8.0.2 ArcDoc: Redlands, CA. [online documentation]. McGowen, J.H., Hentz, T.F., Owen, D.E., Pieper, M.K., Shelby, C.A., and Barnes, V.E., 1991, Geologic Atlas of Texas, Sherman sheet, North-Central Texas, South-Central Oklahoma, revised: Bureau of Economic Geology, 1 sheet, scale 1:250,000 Snyder, J.P., 1987, Map projections--A working manual: U.S. Geological Survey Professional Paper 1395, 383 p. 1967 revised 1991 publication date In work None planned -97.999874 -95.999888 34.017369 32.982604 None Geology Sherman Geologic formations Geologic unit Texas Oklahoma Geologic Faults Fault inlandWaters None. There is uncertainty in the position of geologic faults from the field mapping process, the original map preparation, and the scanning process. It may be inappropriate to use this data set at scales larger than 1:250,000. Jason R. Masoner U.S. Geological Survey Hydrologist mailing address

202 NW 66th St., Bldg. 7

Oklahoma City OK 73116 USA 1-888-275-8747 405-843-7712 jmasoner@usgs.gov Please use email. Compilation of this data set and associated metadata was funded under an Interagency Agreement between the U.S. Environmental Protection Agency, National Risk Management Laboratory, and the U.S. Geological Survey. Resource Analysis and Mapping with Oklahoma State University scanned the original contact prints. Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcInfo 8.1.0.415 Chain-node topology present. This data set includes the geologic faults for the Sherman 1:250,000-scale quadrangle. Bureau of Economic Geology 1991 Map sheet Austin, TX Bureau of Economic Geology 250,000 map The original map of geologic faults was provided by the Bureau of Economic Geology in Austin, Texas, and duplicated on a velox photographic print. The print was scanned using a ANATech 3540 Eagle optical scanner at a four hundred dots per inch resolution. The resulting image was imported into LTPlus, an enhanced software package designed to replace the line Trace System at the USDA-FS, where it was registered and edited as a raster image. The raster image was converted to a DLG3 vector (line) data set and imported in ArcEdit (ESRI, 2000) GIS software to identify and remove features that did not belong in the geologic faults layer (example, roads, streams, political boundaries, and other non-fault features). This type of editing was done repeatedly until all remaining features represented geologic faults. The original map of geologic faults was in the Transverse Mercator Projection, Zone 14, and was cast on the North American Datum of 1927. This geologic fault data set was projected to an Albers Equal Area projection (Synder, 1987), cast on the North American Datum of 1983. Vector Complete chain 6 Point 4 Label point 0 Albers Conical Equal Area 29.500000 45.500000 -96.000000 23.000000 0.000000 0.000000 coordinate pair 0.000512 0.000512 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 faults.aat Arc feature attribute table FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. FNODE# Internal number of from-node Computed Whole numbers that are automatically generated. TNODE# Internal number of to-node Computed Whole numbers that are automatically generated. LPOLY# Internal number of polygon to left of arc Computed Whole numbers that are automatically generated. RPOLY# Internal number of polygon to right of arc Computed Whole numbers that are automatically generated. LENGTH Length of arc in data set units Computed Positive real numbers that are automatically generated. FAULTS# Internal feature number Computed Sequential unique whole numbers that are automatically generated. FAULTS-ID User-assigned feature number User-assigned number FAULT Line type Geologic Atlas of Texas, Sherman sheet THROW Upthrown/downthrown faults Geologic Atlas of Texas, Sherman sheet down Left side of arc is the downthrown side Up Right side of arc is up downthrown side The source map recognizes the downthrown side of a fault with a tic mark attached to a small circle. In this data set the "THROW" item contains records that signify what side of the fault is downthrown. Faults labeled as "up" signify that the downthrown side of the fault is to the right of the line. Faults labeled as "down" signify the downthrown side of the fault is to the left of the line. U.S. Geological Survey Ask USGS - Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+faults Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/faults.e00.gz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998