State of Oregon Oregon Department of Geology and Mineral Industries Brad Avy, State Geologist GEOLOGICAL MAP 126 GEOLOGIC MAP OF THE DOG RIVER AND NORTHERN PART OF THE BADGER LAKE 7.5ʹ QUADRANGLES, HOOD RIVER COUNTY, OREGON by Jason D. McClaughry1, William E. Scott2, Carlie J.M. Duda3, and Richard M. Conrey4 2020 1 Oregon Department of Geology and Mineral Industries, Baker City Field Office, Baker County Courthouse, 1995 3rd Street, Suite 130, Baker City, Oregon 97814 2 U.S. Geological Survey, Cascades Volcano Observatory, 1300 SE Cardinal Court, Vancouver, Washington 98683 3 Oregon Department of Geology and Mineral Industries, 800 NE Oregon Street, Suite 965, Portland, Oregon 97232 4 Hamilton Analytical Laboratory, Taylor Science Center, Hamilton College, 198 College Hill Road, Clinton, New York 13323 Geologic Map of the Dog River and northern part of the Badger Lake 7.5ʹ Quadrangles, Hood River County, Oregon NOTICE This manuscript is submitted for publication with the understanding that the United States Government is authorized to reproduce and distribute reprints for governmental use. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. government. This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. Cover photograph: View west towards Mount Hood volcano and the north-flowing East Fork Hood River, which bisects the Dog River–Badger Lake area (45.35401, -121.53569 WGS84 geographic coordinates; 614697mE, 5023320mN WGS84 UTM Zone 10 coordinates). Photo credit: Jason McClaughry, 2019. Oregon Department of Geology and Mineral Industries Geologic Map 126 Published in conformance with ORS 516.030. For additional information: Administrative Offices 800 NE Oregon Street, Suite 965 Portland, OR 97232 Telephone (971) 673-1555 Fax (971) 673-1562 https://www.oregongeology.org https://www.oregon.gov/dogami Oregon Department of Geology and Mineral Industries Geologic Map 126 ii Geologic Map of the Dog River and northern part of the Badger Lake 7.5ʹ Quadrangles, Hood River County, Oregon TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................................................................ 1 2.0 GEOGRAPHY..................................................................................................................................................... 4 3.0 METHODOLOGY ............................................................................................................................................... 7 4.0 PREVIOUS WORK ........................................................................................................................................... 10 5.0 GEOLOGIC AND TECTONIC SETTING ............................................................................................................... 12 5.1 Yakima Fold Belt ...................................................................................................................................... 14 5.2 High Cascades graben .............................................................................................................................. 16 5.3 Hood River graben ................................................................................................................................... 16 5.3.1 Hood River graben, eastern boundary ............................................................................................ 17 5.3.2 Hood River graben, western boundary ........................................................................................... 18 5.4 Stratigraphic and structural synopsis ........................................................................................................ 19 5.4.1 Oligocene volcanic rocks ................................................................................................................ 23 5.4.2 Lower to middle Miocene volcanic rocks ........................................................................................ 23 5.4.3 Upper Miocene and lower Pliocene volcanic and sedimentary rocks of the early High Cascades................................................................................................................................................. 26 5.4.4 Quaternary and/or upper Pliocene volcanic and sedimentary rocks of the late High Cascades................................................................................................................................................. 33 5.4.5 Upper Cenozoic surficial deposits ................................................................................................... 36 6.0 EXPLANATION OF MAP UNITS ........................................................................................................................ 38 6.1 Overview of map units ............................................................................................................................. 38 Upper Cenozoic surficial deposits ............................................................................................................ 38 Upper Cenozoic volcanic and sedimentary rocks ..................................................................................... 39 Lower Pleistocene and Pliocene volcanic and sedimentary rocks of the late High Cascades...................... 40 Lower Pliocene and upper Miocene volcanic and sedimentary rocks of the early High Cascades .............. 41 6.2 Upper Cenozoic surficial deposits ............................................................................................................. 45 6.2.1 Colluvial deposits ........................................................................................................................... 45 6.2.2 Alluvial deposits ............................................................................................................................. 46 6.2.3 Glacial deposits .............................................................................................................................. 47 6.3 Upper Cenozoic volcanic and sedimentary rocks ...................................................................................... 49 6.3.1 Quaternary and/or upper Pliocene volcanic and sedimentary rocks of the late High Cascades................................................................................................................................................. 49 6.3.2 Lower Pleistocene and Pliocene volcanic and sedimentary rocks of the late High Cascades ............. 65 6.3.3 Lower Pliocene and upper Miocene volcanic and sedimentary rocks of the early High Cascades................................................................................................................................................. 91 6.3.4 Middle and Lower Miocene volcanic rocks .................................................................................... 109 6.3.5 Oligocene volcanic rocks .............................................................................................................. 114 6.3.6 Other rocks .................................................................................................................................. 114 7.0 STRUCTURE .................................................................................................................................................. 115 7.1.1 Thrust faults ................................................................................................................................. 115 7.1.2 North-northwest-striking faults cutting the Hood River graben escarpment .................................. 120 7.1.3 Hood River fault zone ................................................................................................................... 124 8.0 ACKNOWLEDGMENTS .................................................................................................................................. 127 9.0 REFERENCES ................................................................................................................................................. 127 10.0 APPENDIX .................................................................................................................................................. 137 10.1 Geographic Information Systems (GIS) Database .................................................................................. 137 10.2 Methods .............................................................................................................................................. 142 Oregon Department of Geology and Mineral Industries Geologic Map 126 iii Geologic Map of the Dog River and northern part of the Badger Lake 7.5ʹ Quadrangles, Hood River County, Oregon LIST OF FIGURES Figure 1-1. Location of the Dog River-Badger Lake study area ................................................................................ 2 Figure 1-2. Status map of geologic mapping .........................................................................................................