Geologic Map of Washington - Northeast Quadrant
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DE , )I .., I HINGTOh 98504 GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT by KEITH L. STOFFEL, NANCY L. JOSEPH, STEPHANIE ZURENKO WAGGONER, CHARLES W. GULICK, MICHAEL A. KOROSEC, and BONNIE B. BUNNING WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-3 9 "'991 5 a WASHINGTON STATE DEPARTMENT OF 18' Natural Resources Bnan Boyle - CommJss1oner of Pubbc lnndl ' l Ari St8C!ns Supervtsor Division ot Geology and Earth Resources Raymond Lasmanls. Stale Geologjsl UBRP.RY DEPAPT'v'""'·.. ~-,T ,.,..,,.... ,,. "''·~·,·n"!r·1,·s1 .J,J'L. or:c-nuRcr-s,,,._ .... ·,., , L. GEOLOGY Ar:11J E:,-:1:-1 . F:c:s rnv1s10N ""'- OLYMPIA, WASHINGTON 98504 WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES Raymond Lasmanis, State Geologist GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT by KEITH L. STOFFEL, NANCY L. JOSEPH, STEPHANIE ZURENKO WAGGONER, CHARLES W. GULICK, MICHAEL A. KOROSEC, and BONNIE B. BUNNING WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-39 1991 WASHINGTON STATE DEPARTMENT OF Natural Resources QE175 Brian Boyle - Comm1ss1oner of Publlc Lands A3 Art Stearns - Supervisor M3 39 copy l [text]e Photograph on envelope: Northwest-dipping cuesta formed on resistant layers of gneiss in the Okanogan meta morphic core complex near Riverside, Washington; Okanogan River in the foreground. Aerial view to the northeast. Photograph courtesy of K. F. Fox, Jr., U.S. Geological Survey. This report is for sale by: Publications Washington Department of Natural Resources Division of Geology and Earth Resources Mail Stop PY-12 Olympia, WA 98504 Folded map set: Price $ 7.42 Tax .58 (Washington residents only) Total $ 8.00 Flat map set: Price $ 9.28 Tax . 72 (Washington residents only) Total $10.00 (Flat map sets are mailed in tubes.) Mail orders must be prepaid. Please add $1.00 to each order for postage and handling. Make checks payable to Department of Natural Resources. Printed in the United States of America. Printed on recycled stock. ii CONTENTS Page Introduction . 1 Map compilation . 1 Acknowledgments . 1 Map design .... 3 Descriptions of map units 4 List of named units . 4 Sources of map data . 4 Correlation diagram . 12 Bedrock geologic and tectonic map and table summarizing the geologic history of the northeast quadrant 25 References cited . 26 ILLUSTRATIONS Figure 1. Index to sources of map data, scales 1:1,200 through 1:21,600 .. 5 Figure 2. Index to sources of map data, scale 1:24,000. ....... 6, 7 Figure 3. Index to sources of map data, scales 1:25,000 through 1:50,688 .8 Figure 4. Index to sources of map data, scales 1:62,500 through 1:96,000 .9 Figure 5. Index to sources of map data, scales 1:100,000 through 1:101,400 10 Figure 6. Index to sources of map data, scales 1:125,000 through 1:475,200 11 TABLE Table 1. Compiler, 1:100,000-scale quadrangle, and open-file report number for geologic maps in the northeast quadrant of Washington . 1 iii PREFACE State geologic maps are valuable tools that can be used for exploration for mineral resources, evaluation of geologic hazards, land-use planning, and education. Previous geologic maps of the state of Washington were published by our predecessors, the Washington Division of Geology (Culver, 1936) and the Washington Division of Mines and Geology (Huntting and others, 1961). Both of these maps are now out of print. The scale of the first two state geologic maps was 1:500,000. However, 74 per cent of all published and thesis geologic maps of areas in Washington postdate the 1961 state geologic map. We therefore decided to publish the new state geologic map in four quadrants at a scale of 1:250,000 to better display this accumulated information. As in the first map of this quadrant series (Walsh and others, 1987), we have attempted to make this geologic map useful at several levels of detail and to a variety of users by (1) employing time-litho logic units on the map rather than formations; (2) portraying unconsolidated deposits in as much detail (where available) as bedrock units; (3) using a multiple-level scheme of colors, patterns, and map symbols to represent the geologic units; and (4) providing a wider range of supporting materials than is commonly found on state geologic maps. Full explanation of these characteristics is given in the text that follows. The state geologic map program has entailed an exhaustive effort to obtain all existing published and unpublished geologic map data, and to synthesize the information into a series of 1:100,000- and 1:250,000-scale geologic maps and reports. This project has enhanced working contacts, data ex change, and mutual support among geologists at the Division of Geology and Earth Resources and at universities, in federal agencies, and in the private sector. We are proud of this map and look forward to the continuing challenge of compiling the remaining two quadrant maps. We hope that you will realize as many benefits in the use of this map as we have in its preparation. J. Eric Schuster, Project Manager Bonnie B. Bunning, Assistant Project Manager William M. Phillips, Assistant Project Manager May 22, 1991 V r GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT by Keith L. Stoffel, Nancy L. Joseph, Stephanie Zurenko Waggoner, Charles W. Gulick, Michael A. Korosec, and Bonnie B. Bunning INTRODUCTION maps and accompanying source-of-data maps, descriptions of map units, isotopic and fossil age data, and whole-rock geo The Geologic Map of Washington - Northeast Quadrant chemistry data were then synthesized to prepare the is the second in a series of four 1:250,000-scale geologic 1:250,000-scale geologic map of Washington and the other maps, which together will make up the third geologic map of components of this publication. Washington published by the Washington Division of Geology and Earth Resources and its predecessors. The Geologic Map ACKNOWLEDGMENTS of Washington - Southwest Quadrant, the first map in the series, is available as Washington Division of Geology and The Geologic Map of Washington - Northeast Quadrant Earth Resources Geologic Map GM-34 (Walsh and others, is the culmination of the efforts of hundreds of geologists over 1987). The remaining two maps in the series, the Geologic the better part of a century. The contributions of many of the Map of Washington - Southeast Quadrant and the Geologic geologists are acknowledged by citation. (See References Map of Washington - Northwest Quadrant, are currently in Cited.) Regrettably, many other significant works are not preparation (May 1991). cited. We gratefully acknowledge all those geologists who In addition to the geologic map, the northeast quadrant have made vital contributions toward deciphering the complex publication includes a key to geologic units, descriptions geology of northeastern Washington. of map units, a list of named units, a correlation dia Numerous individuals have contributed greatly to the suc gram, a 1 :625,000-scale bedrock geologic and tectonic cess of the state geologic map project and the publication of map, a summary of the geologic history of northeast this report. We offer warm thanks to the people named on ern Washington, source-of-data maps, and a list of ref the following pages for their invaluable contributions. erences cited. A topographic base map is available separately. Table 1. Compiler, 1: 100,000-scale quadrangle, and MAP COMPILATION DGER open-file report number for geologic maps in the northeast quadrant of Washington Preliminary compilation of the Geologic Map of Washing ton - Northeast Quadrant began in 1984, when all available Open File published and unpublished geologic information was compiled Report on sixteen 1: 100,000-scale quadrangles. (See Sheet 1.) Be Compilers Quadrangle Number tween 1984 and 1988, Division of Geology and Earth Re 90-9 sources (DGER) geologists mapped (at reconnaissance and Bunning, B. B. Twisp 90-1 detailed levels) areas where previous geologic mapping was Gulick, C. W. Moses Lake Gulick, C. W. Ritzville 90-2 either inadequate or lacking. New geologic mapping was also Gulick, C. W.; Banks Lake 90-6 acquired during that time through a DGER geologic mapping Korosec, M. A. support program, which funded 23 university graduate stu Gulick, C. W.; Omak 90-12 dent and faculty member mapping projects. (See Acknowledg Korosec, M. A. ments.) The new geologic mapping has been augmented by Joseph, N. L. Colville 90-13 4 23 new potassium-argon (K-Ar) ages, 2 new radiocarbon (1 C) Joseph, N. L. Nespelem 90-16 ages, and 230 new whole-rock geochemical analyses, which Joseph, N. L. Spokane 90-17 are provided in the reports listed in Table 1. Korosec, M. A. Chelan In 1990, following extensive reviews by geologists out Stoffel, K. L. Republic 90-10 side the DGER, fourteen of the sixteen 1:100,000-scale geo Stoffel, K. L. Oroville 90-11 logic maps were released as Washington Division of Geology Stoffel, K. L.; Robinson Mtn. 90-5 and Earth Resources open-file reports (Table 1). Reports were McGroder, M. F. not prepared for the Chelan and Wenatchee quadrangles be Waggoner, S. Z. Rosalia 90-7 cause geologic maps of those quadrangles have been pub Waggoner, S. Z. Chewelah 90-14 lished by the U.S. Geological Survey (USGS) (Tabor and Waggoner, S. Z. Coulee Dam 90-15 others, 1982, 1987). The sixteen 1: 100,000-scale geologic Walsh, T. J. Wenatchee 2 GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT Cartographic and Editorial Support (DGER staff) Unpublished Geologic Mapping Nancy A. Eberle Brian F. Atwater (USGS) Carl F. T. Harris Eric R. Braun (consulting geologist) Donald W. Hiller Eric S. Cheney (University of Washington) Keith G. Ikerd Edward D. Fields (Boise Cascade Corp.) William M.