U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY GEOLOGIC MAP OF THE CHRISTIAN QUADRANGLE, ALASKA by BrosgŽ, W.P.(1), and Reiser, H.N. 2000 OPEN-FILE REPORT 00-192 U.S. Department of the Interior Bruce Babbitt, Secretary U.S. Geological Survey Charles G. Groat, Director This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. (1) 345 Middlefield Road, Menlo Park, CA 94025 DISCLAIMERS This World-Wide-Web publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, 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. Although all data and software published on the Web-site have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and not responsibility is assumed by the USGS in the use of this data, software, or related materials. INTRODUCTION Open-File Report 00-192 is a 1:250,000 scale reconnaissance geologic map of the Christian quadrangle, Alaska showing bedrock and surficial geology, correlation of map units, fossil table, and structural point data. In addition, there is a pamphlet containing detailed descriptions of the geologic units, and descriptions of the geologic setting, history of mapping, and mineral and geophysics investigations. This is a Print-on-Demand product. Instructions for obtaining a paper copy of the map sheet and accompanying pamphlet are below. The digital geologic data set was created using ARC/INFO, version 7.2.1, a commercial Geographic Information System (GIS) designed by Environmental Systems Research Institute (ESRI), Redlands, California. The geospatial datasets and associated files are available online at http://geopubs.wr.usgs.gov. The data set consists of the following: ARC/INFO coverages (in interchange file format): csgeol.e00 Polygon and line coverage showing geologic units and contacts (2.5mb) csfold.e00 Line coverage of fold axes (syncline and anticline) (12kb) csstruct.e00 Point data showing the strike and dip of bedding; with annotation (282kb) cspoint.e00 Point coverage showing fossil and oil shale locations (7kb) Text and image files: christiantext.doc Pamphlet, Microsoft Word 2000 file christiantext.pdf Pamphlet, Adobe Acrobat .pdf file csopenfile.pdf Map sheet, Adobe Acrobat .pdf file csopenfile.gif Map sheet, gif image (394kb) csopenfile.eps Map sheet, EPS print file (45mb) csopenfile.ai Map sheet, 45" x 26", Adobe Illustrator, version 8, file (34mb) Other files: readme.txt this document csgeol_meta Metadata file, technical description the geospatial data set csgeol_meta.txt Metadata as a text file csgeol_meta.htm Metadata in html format csgeol_meta.faq Metadata in "frequently asked questions" format HOW TO OBTAIN PAPER PLOTS This is a Print-on-Demand (POD) product and may be obtained from USGS National Mapping Division (NMD). POD products are listed on USGS web site http://rmmcweb.cr.usgs.gov/public/mod/ (where they are referred to as "Maps on Demand" [MOD]}. An order form can be printed from this Web site, and orders may be placed by mail or in person at an Earth-Science Information Center (ESIC) office. Telephone orders can also be made by calling 1-888-ASK-USGS (1-888-275-8747). The address for mail orders is: USGS Information Services Box 25286 Denver, CO 80225 DATABASE FILES The geologic map data set consists of ARC/INFO coverages and INFO data tables that relate to the map features. The coverages that comprise the data set consist of feature classes that include geologic lines (arcs), areas (polygons), and points. See metadata (csgeol_meta.txt) for detailed descriptions of structure and content of arc attribute tables. Cover csgeol contains both arcs and polygon attributes. Arcs define the geologic contacts (stratigraphic boundary, fault, or other linear feature) and are described in the arc attribute table (csgeol.aat). Item LINETYPE is a text field which describes the type of arc; ARC-CODE is a numeric code which defines the arc. Polygon define the geologic units and are described in the polygon attribute table (csgeol.pat). Items UNIT, and UNITTYPE identify the geologic unit. CLASS is a numeric code for the geologic unit. Cover csfold contains arcs which represent the axes of synclines and anticlines. The arc attribute table (csfold.aat) includes an item LINETYPE, which describe the type of fold. Cover csstruct contains the information of the point structure data (strike and dip), and includes annotation of the dip value. Items in the point attribute table (csstruct.pat) include ANGLE, DIP, CODE, and POINTTYPE. The angle is measure azimuthal, with North as 0 degrees, increasing in clockwise direction. The dip is 90 degrees clockwise from ANGLE. Item POINTTYPE describes the measurement type. Cover cspoint displays the distribution of fossil and oil shale localities. Item STATION refers to the map number given in Table 1 of OFR00-192.