U.S. Geological Survey Data Series 250 Modal Composition and Age of Intrusions in North-central and Northeast Nevada By Edward A. du Bray1 and A. Elizabeth Jones Crafford2 1 U.S. Geological Survey Box 25046, Mail Stop 973 Denver Federal Center Lakewood, CO 80225-0046 2 GeoLogic 9501 Nettleton Drive Anchorage, AK 99507 U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director For more information about Modal Composition and Age of Intrusions in North-central and Northeast Nevada, please contact: Edward A. du Bray U.S. Geological Survey Box 25046, Mail Stop 973 Denver Federal Center Lakewood, CO 80225-0046 303-236-5591 edubray@usgs.gov or A. Elizabeth Jones Crafford GeoLogic 9501 Nettleton Drive Anchorage, AK 99507 907-272-0171 ecrafford@alaska.com I. Introduction This product is a compilation of composition and geochronologic information about intrusions of north-central and northeast Nevada intended to aid in the study of the geologic framework of the region. This product contains Portable Document Format (.pdf) files, which require Adobe Acrobat for viewing. Installation files for Acrobat Reader 7 for Windows and Macintosh are provided on the disk. II. DISCLAIMERS This 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 this product 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 no responsibility is assumed by the USGS in the use of this data, software, or related materials. III. SYSTEM REQUIREMENTS Minimum System Requirements Windows-based computer: Intel Pentium processor computer (486 minimum, Pentium or Pentium Pro recommended), with Microsoft Windows XP, Windows 2000, Windows NT 4.0 with Service Pack 5 or later Windows 98 Second Edition, or Windows 95 Service Release 2 (OSR2); 64 MB of RAM. Macintosh computer: Power PC processor; Mac OS 8.6 or later; 64 MB of RAM. IV. INSTRUCTIONS AND DOCUMENTATION FOR U.S. GEOLOGICAL SURVEY DATA SERIES 250 A. To access the data: Software Required: Adobe Acrobat Reader 7 ArcGIS 9.1 or later Microsoft Excel This publication contains data files and ArcGIS 9.x project files needed to display a shape file showing the Intrusions of north-central and northeast Nevada. The map can be viewed by opening: NevadaIntrusiveRocks.mxd using ArcGIS 9.1 or higher. B. Contents: The downloads directory (DS250) contains the following files and folders: Files: 00ReadMeFirst.txt -- This file is a text document. IntrusionsNENV.xls -- An Excel spreadsheet containing all of the intrusion attribute data. NevadaIntrusiveRocks.mxd -- The ArcGIS project file that accesses all of the data layers used to display the map using ArcMap software. IntrNENVpolys.txt -- Tab-delimited text file version of IntrNENVpolys tab within IntrusionNENV.xls. IntrSorted.txt -- Tab-delimited text file version of IntrSorted tab within IntrusionNENV.xls. Metadata.txt -- Metadata file for Intrusions_polyNENV.shp. Folders: pdf DS250_text.pdf -- Text that accompanies the map. DS250_map.pdf -- Adobe Acrobat Reader version (plottable) of intrusions map. This map has been enhanced considerably from the version accessed via the NevadaIntrusiveRocks.mxd file. Intrusion color selections have been modified to enable easier identification of time versus composition relations. Also, in two parts of the map that are especially cluttered, marginal inset maps have been created in order to ameliorate this situation. Cities CITIES_P_Clip.dbf CITIES_P_Clip.prj CITIES_P_Clip.sbn CITIES_P_Clip.sbx CITIES_P_Clip.shp CITIES_P_Clip.shp.xml CITIES_P_Clip.shx Cities and Towns.lyr Contours CTOUR2_Clip.dbf CTOUR2_Clip.prj CTOUR2_Clip.sbn CTOUR2_Clip.sbx CTOUR2_Clip.shp CTOUR2_Clip.shp.xml CTOUR2_Clip.shx Contours-150M 2 ArcSec.lyr Counties NEVADACOUNTIES_Project_Clip.dbf NEVADACOUNTIES_Project_Clip.prj NEVADACOUNTIES_Project_Clip.sbn NEVADACOUNTIES_Project_Clip.sbx NEVADACOUNTIES_Project_Clip.shp NEVADACOUNTIES_Project_Clip.shp.xml NEVADACOUNTIES_Project_Clip.shx County Boundaries.lyr Metadata Bndy_State_Counties.doc Geology Intrusions_polyNENV.dbf Intrusions_polyNENV.prj Intrusions_polyNENV.sbn Intrusions_polyNENV.sbx Intrusions_polyNENV.shp Intrusions_polyNENV.shp.xml Intrusions_polyNENV.shx Intrusions of Northeast Nevada.lyr Rivers nevadarivers_Clip.dbf nevadarivers_Clip.prj nevadarivers_Clip.sbn nevadarivers_Clip.sbx nevadarivers_Clip.shp nevadarivers_Clip.shp.xml nevadarivers_Clip.shx Rivers.lyr Roads ROADS_A_Clip.dbf ROADS_A_Clip.prj ROADS_A_Clip.sbn ROADS_A_Clip.sbx ROADS_A_Clip.shp ROADS_A_Clip.shp.xml ROADS_A_Clip.shx Roads.lyr USGS4DBox studyarea_boundary_UTM.dbf studyarea_boundary_UTM.prj studyarea_boundary_UTM.sbn studyarea_boundary_UTM.sbx studyarea_boundary_UTM.shp studyarea_boundary_UTM.shp.xml studyarea_boundary_UTM.shx Metallogeny of the Great Basin Study Area.lyr