Stephen J. Char, U.S. Geological Survey 20000509 Version 1.0, May 9, 2000 map Open-File Report 00-265 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr00-265_geol Char, Stephen J. 2000 http://pubs.er.usgs.gov/publication/ofr00265 This geospatial data set describes bedrock geology of the Turkey Creek drainage basin in Jefferson County, Colorado. It was digitized from maps of fault locations and geologic map units based on age and lithology. Created for use in the Jefferson County Mountain Ground-Water Resources Study, it is to be used at a scale no more detailed than 1:50,000. This data set was created for analysis of the ground-water system of the study area. The source materials for the generation of this data set consist of bedrock geology mapped on U.S. Geological Survey (USGS) topographic quadrangles at a scale of 1:24,000 by the USGS. The source materials were converted to digital format, topologically developed, and attributed on a quadrangle-by- quadrangle basis before being combined into one data set. The procedures for converting the materials to digital format differed for each quadrangle and are summarized as follows: Conifer The original camara-ready transparency of the map publication, Reconnaissance Geologic Map of the Conifer Quadrangle, Jefferson County, Colorado, was obtained from the USGS. A film-positive was made from this transparency. To simplify the linework, this film-positive was then traced by hand onto mylar. The mylar was then digitally scanned at 300 dots per inch (dpi) and stored as a TIFF image. Using Arc/INFO software from Environmental Systems Research Institute, the image was georeferenced to real-world coordinates and converted into an Arc/INFO raster data set format known as a grid, which was then vectorized into an Arc/INFO vector data set format known as a coverage. A quadrangle boundary outline that was generated from quadrangle boundary coordinates and then projected into real-world coordinates was added to the coverage, which was then converted to a coverage with polygon topology. Line features in the coverage were attributed according to fault type classification, and the polygon features were attributed according to bedrock geologic map unit and fault zone classification. Evergreen An incomplete collection of the original pre-press mylar separates for the map publication, Geologic Map of the Evergreen Quadrangle, Jefferson County, Colorado, was obtained from the USGS. Mylar separates of Quaternary geologic contacts and faults were identified and digitally scanned at 300 dpi into TIFF images. All other geologic contacts in the area of interest were traced onto mylar from a paper print of the map publication. Furthermore, an enclosing polygon outline outside of the area of interest was drawn on the mylar so that the traced contacts would form polygon features. The mylar was then digitally scanned at 300 dpi into a TIFF image. All the images were then georeferenced to real-world coordinates, converted into grids, and vectorized into three separate coverages, one for each of the two mylar sources, and one for the traced source. These coverages were then combined into one coverage. One of the authors of the map publication provided updated nomenclature for Precambrian map units (Bruce Bryant, U.S. Geological Survey, oral communication, 1998) so that the nomenclature would match that of adjacent quadrangles. The line features in the coverage were attributed according to fault type, and polygon features were attributed according to geologic map unit and fault zone classification. Indian Hills A paper print of the map publication, Geologic Map of the Indian Hills Quadrangle, Jefferson County, Colorado, was obtained from the USGS. For the area of interest on the quadrangle, two mylars were hand-traced from this paper print. One mylar consisted of geologic contacts and an enclosing polygon outline outside of the area of interest that was drawn so that the contacts would form polygon features. The other mylar consisted of fault traces. The two mylars were then digitally scanned at 300 dpi into TIFF images. These images were georeferenced to real-world coordinates and converted into grids which were then vectorized into coverages. The coverages were then combined into one coverage. One of the authors of the map publication provided updated nomencla- ture for Precambrian map units (Bruce Bryant, U.S. Geological Survey, oral communication, 1998) so that the nomenclature would match that of adjacent quadrangles. Line features in the coverage were attributed according to fault type, and polygon features were attributed according to geologic map unit and fault zone classification. Meridian Hill A paper photocopy of preliminary geologic mapping consisting of faults and geologic contacts for the Meridian Hill Quadrangle, Clear Creek, Jefferson, and Park Counties, was obtained from the USGS. For the area of interest on this quadrangle, all the linework was traced onto mylar. Furthermore, an enclosing polygon outline outside of the area of interest was drawn on the mylar so that the traced contacts would form polygon features. The mylar was then digitally scanned at 300 dpi into a TIFF image. The image was georeferenced to real-world coordinates and converted into a grid which was then vectorized into a coverage. Line features in the coverage were then attributed according to fault type, and the polygon features were attributed according to geologic map unit and fault zone classification. Morrison The original pre-press mylar separates for the map publication Geologic Map of the Morrison Quadrangle, Jefferson County, Colorado, were obtained from the USGS. The mylar separate of geologic contacts was digitally scanned at 300 dpi into a TIFF image. This image was georeferenced to real-world coordinates and converted into a grid which was then vectorized into a coverage. The fault linework was digitized into a coverage from another mylar separate of the same publication that had too many other themes on it and was therefore too difficult to scan and vectorize. The fault coverage was then transformed to real-world coordinates. The coverages were then combined into one coverage. An enclosing polygon outline outside of the area of interest was digitized into the coverage so that the geologic contacts would form polygon features. Line features in the coverage were attributed according to fault type, and polygons were attributed according to geologic map unit and fault zone classification. Once the polygon and vector topology was developed for each quadrangle, the individual coverages were combined into one coverage. No edgematching was performed. A study-area outline of the Turkey Creek Watershed was delineated in Arc/INFO with USGS Digital Elevation Model data sets. A 500-meter buffer polygon of this outline was used to clip the geology coverage. 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 Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Arc/INFO format, this metadata file may include some Arc/INFO-specific terminology. 2000 Publication Date Complete None Planned -105.40936034 -105.17523348 39.6701563 39.49943396 none geology bedrock fault inlandWaters none Conifer Evergreen Indian Hills Meridian Hill Morrison Jefferson County Colorado Turkey Creek Basin none The scale of the source materials for this data set was 1:24,000. However, due to the nature of bedrock geologic mapping, fault and contact locations will not be as precise as other, more easily-located cartographic features. Furthermore, materials for the Meridian Hill Quadrangle, while compiled at a scale of 1:24,000, were intended for publication at 1:500,000. District Chief U.S. Geological Survey District Chief mailing address

PO Box 25046 MS 415 Denver Federal Center

Denver Colorado 80225 USA 1-888-275-8747 303-236-4912 dc_co@usgs.gov This data set was created for the Jefferson County Mountain Ground-Water Assessment project. The project was done in cooperation with the Jefferson County Planning and Zoning Department, U.S. Environmental Protection Agency, Colorado Department of Natural Resources--Water Resources Division, Colorado Department of Health, Colorado Geological Survey, Colorado School of Mines, International Groundwater Modeling Center, and U.S. Geological Survey. SunOS, 5.6, sun4u UNIX Arc/INFO version 7.2.1 Feature attribution is solely based on the source map information. Polygon topology present. Because no exact linear feature was used to delineate areas that are intruded by small quartz-monzonite bodies on the source materials, these areas were not recorded in this coverage. All other contacts and fault traces were recorded. Paper hardcopies of the data set were plotted at the same scale as the source material. These hardcopies and the source materials were then compared by the Project Chief to ensure a level of accuracy required for the study. The digital linework is accurate to +/- 7 meters. Bruce Bryant, U.S. Geological Survey 1974 map Miscellaneous Field Studies Map MF-597 Denver, Colorado, U.S.A. U.S. Geological Survey 24000 mylar separates 1974 Publication Date none vectors, and vector and polygon attributes Douglas M. Sheridan, John C. Reed, Jr., and Bruce Bryant, U.S. Geological Survey 1972 map Map Folio I-786-A Washington, District of Columbia, U.S.A. U.S. Geological Survey 24000 mylar separates and paper print 1972 Publication Date none vectors, and vector and polygon attributes Bruce Bryant, Robert D. Miller, and Glenn R. Scott, U.S. Geological Survey 1973 map Geologic Quadrangle Map GQ-1073 Washington, District of Columbia, U.S.A. U.S. Geological Survey 24000 paper print 1973 Publication Date none vectors, and vector and polygon attributes Bruce Bryant, U.S. Geological Survey 0000 map unpublished unpublished unpublished unpublished 24000 paper photocopy 0000 Publication Date none vectors, and vector and polygon attributes Glenn R. Scott, U.S. Geological Survey 1972 map Map Folio I-790-A Washington, District of Columbia, U.S.A. U.S. Geological Survey 24000 mylar separates 1972 Publication Date none vectors, and vector and polygon attributes See supplemental information. 20000509 First draft of metadata created by sjchar using FGDCMETA.AML ver. 1.3 06/22/98 on Arc/INFO data set /gis/users/cuffin/geol/geol_tc 20000509 Vector Point 1063 String 2748 GT-polygon composed of chains 1064 Universal Transverse Mercator 13 0.9996 -105.0 0.0 500000 0.0 coordinate pair 0.001 0.001 Meters North American Datum of 1927 Clarke 1866 6378206.4 294.98 GEOL_TC.PAT is a data table containing polygon attributes AREA, PERIMETER, GEOL_TC#, GEOL_TC-ID, GEOL, and FLTZONE. AREA: area of the polygonal feature in square meters PERIMETER: perimeter of the polygonal feature in meters GEOL_TC#: an Arc/INFO-generated internal feature-identity integer number GEOL_TC-ID: a user-assigned feature-identity integer number GEOL: bedrock geologic map unit, table of valid alphanumeric domains: AF.....ARTIFICIAL FILL QPP....POST-PINEY CREEK ALLUVIUM (UPPER HOLOCENE) QAF....FAN ALLUVIUM QP.....PINEY CREEK ALLUVIUM (UPPER HOLOCENE) QT.....TALUS (UPPER HOLOCENE) QF.....ALLUVIAL FAN DEPOSITS QC.....COLLUVIUM (UPPER HOLOCENE TO PLEISTOCENE) QLS....LANDSLIDE DEPOSIT (UPPER HOLOCENE TO PLEISTOCENE?) QOAC...OLDER ALLUVIUM AND COLLUVIUM (PLEISTOCENE) QL.....LOUVIERS ALLUVIUM QS.....SLOCUM ALLUVIUM (PLEISTOCENE, SANGAMON INTERGLACIATION) QV.....VERDOS ALLUVIUM (PLEISTOCENE, KANSAN GLACIATION) TSH....SHONKINITE PP_F...FOUNTAIN FORMATION (PERMIAN AND PENNSYLVANIAN) YBL....BIOTITE LATITE (PRECAMBRIAN Y?) YPP....PIKES PEAK GRANITE (PRECAMBRIAN Y) YSP....SILVER PLUME QUARTZ MONZONITE (PRECAMBRIAN Y) YPB....FINE-GRAINED PORPHYRITIC PHASE OF THE PIKES PEAK .......GRANITE (PRECAMBRIAN Y) G......GRANITIC ROCK P......COARSE-GRAINED PEGMATITE XMGD...MAFIC GRANODIORITE AND QUARTZ DIORITE (PRECAMBRIAN X) XGQG...GNEISSIC GRANODIORITE AND QUARTZ MONZONITE (PRECAMBRIAN X) XGQM...GNEISSIC QUARTZ MONZONITE (PRECAMBRIAN X) XGNM...MIGMATITIC QUARTZO-FELDSPATHIC GNEISS (PRECAMBRIAN X) XM.....MIGMATITE (PRECAMBRIAN X) AQM....AMPHIBOLITE, QUARTZITE, MARBLE, AND ASSOCIATED ROCKS XA.....AMPHIBOLITE (PRECAMBRIAN X) XB.....BIOTITE GNEISS AND ASSOCIATED ROCKS (PRECAMBRIAN X) XBGC...SILLIMANITIC BIOTITE GNEISS CONTAINING GARNET- .......BEARING LAYERS AND CORDIERITE-FELDSPAR-RICH GNEISS .......(PRECAMBRIAN X) XHCS...INTERLAYERED HORNBLENDE GNEISS, CALC-SILICATE .......GNEISS AND AMPHIBOLITE (PRECAMBRIAN X) XF.....FELDSPAR-RICH GNEISS (PRECAMBRIAN X) GMG....GARNET-MICA GNEISS FG.....WELL-FOLIATED, MEDIUM-GRAINED BIOTITE-QUARTZ .......MONZONITIC OR GRANITIC GNEISS FGU....FELSIC GNEISS SQ.....RUTILE-BEARING SILLIMANITE QUARTZITE FLTZN..UNIDENTIFIABLE MAP UNIT IN FAULT ZONE FLTZONE: fault zone indicator, Y for fault zone, N for none GEOL_TC.AAT is a data table containing line attributes FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, GEOL_TC#, GEOL_TC-ID FLT, FLTTYPE, and EDGE. FNODE#: internal unique integer number of from-node TNODE#: internal unique integer number of to-node LPOLY#: internal unique integer number of polygon to left of arc RPOLY#: internal unique integer number of polygon to right of arc LENGTH: length of arc in meters GEOL_TC#: internal unique integer feature number GEOL_TC-ID: user-defined integer feature number FLT: fault indicator, Y for fault, N for none FLTTYPE: fault location certainty indicator, K for known, C for concealed, A for approximate, N for none EDGE: quadrangle boundary indicator, 1 for edge, 0 for not none 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+ofr00-265_geol 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/ofr00-265_geol.e00.gz Other STDS file format zipped 1 http://water.usgs.gov/GIS/dsdl/ofr00-265_geol.tgz 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://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr00-265_geol FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998