Geologic Map of Nevada By A. Elizabeth Jones Crafford1 With a section on A Digital Conodont Database of Nevada By Anita G. Harris2 and A. Elizabeth Jones Crafford1 Prepared in cooperation with the Nevada Bureau of Mines and Geology Pamphlet to accompany Data Series 249 1GeoLogic, 9501 Nettleton Drive, Anchorage, Alaska 2U.S. Geological Survey, Denver, Colo. U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia: 2007 Version 1.0 For sale by U.S. Geological Survey Information Services Box 25286, Denver Federal Center Denver, Colo. 80225 For more information about the USGS and its products: Telephone: 1-888-ASK-USGS World Wide Web: http//www.usgs.gov/ Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Crafford, A.E.J., 2007, Geologic Map of Nevada: U.S. Geological Survey Data Series 249, 1 CD-ROM, 46 p., 1 plate. Library of Congress Cataloging-in-Publication Data Crafford, A. Elizabeth Jones, Geologic Map of Nevada p. cm. –(U.S. Geological Survey data series ; 249) Includes bibliographic references. 1. Geology—Nevada. ISBN: 978-141131812-0 iii Contents Introduction.....................................................................................................................................................1 The Digital Map ..............................................................................................................................................1 Components of the Digital Map ...................................................................................................................2 Biostratigraphy ......................................................................................................................................2 Cities ....................................................................................................................................................2 Contours .................................................................................................................................................2 Counties ..................................................................................................................................................3 Geology ...................................................................................................................................................3 Lakes ....................................................................................................................................................3 Public Land Survey ...............................................................................................................................3 Quadrangles...........................................................................................................................................3 Resources ..............................................................................................................................................3 Rivers ....................................................................................................................................................3 Roads ....................................................................................................................................................3 Summary of Regional Geologic Interpretation .........................................................................................3 Detailed Explanation of Geologic Units ......................................................................................................7 Quaternary Sediments and Rocks (Holocene and Pleistocene) ...................................................7 Sediments and Sedimentary Rocks ..........................................................................................7 Volcanic Rocks .............................................................................................................................8 Quaternary and Pliocene Sediments and Rocks .............................................................................8 Sediments and Sedimentary Rocks ..........................................................................................8 Volcanic Rocks .............................................................................................................................8 Tertiary and Upper Cretaceous(?) Rocks ..........................................................................................8 Volcanic and Sedimentary Rocks .............................................................................................8 Intrusive Rocks ...........................................................................................................................11 Miocene(?) to Jurassic(?) Intrusive Rocks .....................................................................................11 Mesozoic Intrusive and Volcanic Rocks .........................................................................................11 Intrusive Rocks ...........................................................................................................................11 Volcanic Rocks ...........................................................................................................................12 Mesozoic Terranes, Sedimentary Rocks, and Assemblages ......................................................13 Terranes .......................................................................................................................................14 Walker Lake Terrane ........................................................................................................14 Black Rock-Jackson Terrane ..........................................................................................15 Sand Springs Terrane .......................................................................................................15 Quartz Mountain Terrane .................................................................................................16 Jungo Terrane ...................................................................................................................16 Sedimentary Rocks and Assemblages ...................................................................................16 Localized Clastic Rocks ...................................................................................................16 Gold Range Assemblage .................................................................................................17 Humboldt Assemblage .....................................................................................................18 Siliciclastic Overlap Assemblage ..................................................................................18 Cratonal Sequence ...........................................................................................................19 iv Paleozoic Rocks ..................................................................................................................................20 Sedimentary and Metamorphic Rocks ...................................................................................21 Carbonate Shelf Sequence .............................................................................................21 Undivided and Metamorphosed Carbonate Shelf Sequence Rocks ........................24 Terranes and Assemblages ......................................................................................................24 Golconda Terrane .............................................................................................................24 Siliciclastic Overlap Assemblage ..................................................................................26 Foreland Basin Assemblage ...........................................................................................27 Dutch Flat Terrane ............................................................................................................28 Slope Assemblage ............................................................................................................29 Basin Assemblage ............................................................................................................32 Nolan Belt ..........................................................................................................................33 Precambrian and Other Rocks .........................................................................................................34 Lower Cambrian to Latest Proterozoic Clastic Rocks .........................................................34 Proterozoic Basement Rocks ..................................................................................................35 Other Rocks.................................................................................................................................35 Map References...........................................................................................................................................36 References ....................................................................................................................................................37