GEOLOGIC MAPS OF THE KLONDIKE BLUFFS, MOLLIE HOGANS, AND THE WINDOWS SECTION 7.5' QUADRANGLES, GRAND COUNTY, UTAH by Hellmut H. Doelling and Paul A. Kuehne MAP 258DM, MAP 259DM, MAP 260DM UTAH GEOLOGICAL SURVEY a division of UTAH DEPARTMENT OF NATURAL RESOURCES 2013 GEOLOGIC MAPS OF THE KLONDIKE BLUFFS, MOLLIE HOGANS, AND THE WINDOWS SECTION 7.5' QUADRANGLES, GRAND COUNTY, UTAH by Hellmut H. Doelling and Paul A. Kuehne NOTE: This booklet is intended for three quadrangle geologic maps, published and purchased separately: Klondike Bluffs, Mollie Hogans, and The Windows Section. Not all map units are present in each quadrangle. Cover photo: (top left) View looking northwest across the Salt Valley Anticline in Arches National Park. The rounded sandstone slickrock in the foreground is the Slick Rock Member of Entrada Sandstone and the Dewey Bridge Member of the Carmel Formation, and the background shows mostly Cretaceous strata (Photo by Jim Kirkland). (top right) View of Wall Arch before it collapsed in 2008. Wall Arch was made of the Slick Rock Member of Entrada Sandstone, and collapsed sometime in the night of August 4, 2008 (Photo by Grant Willis). (bottom) View of South Window Arch. The Arch is composed of the Dewey Bridge Member of Carmel Formation, and the Slickrock Member of Entrada Sandstone (Photo by Gregg Buekelman). MAP 258DM, MAP 259DM, MAP 260DM UTAH GEOLOGICAL SURVEY a division of UTAH DEPARTMENT OF NATURAL RESOURCES 2013 STATE OF UTAH Gary R. Herbert, Governor DEPARTMENT OF NATURAL RESOURCES Michael Styler, Executive Director UTAH GEOLOGICAL SURVEY Richard G. Allis, Director PUBLICATIONS contact Natural Resources Map & Bookstore 1594 W. North Temple Salt Lake City, UT 84116 telephone: 801-537-3320 toll-free: 1-888-UTAH MAP website: mapstore.utah.gov email: [email protected] UTAH GEOLOGICAL SURVEY contact 1594 W. North Temple, Suite 3110 Salt Lake City, UT 84116 telephone: 801-537-3300 website: geology.utah.gov Although this product represents the work of professional scientists, the Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding its suitability for a particular use, and does not guarantee accuracy or completeness of the data. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product. For use at 1:24,000 scale only. CONTENTS ABSTRACT ......................................................................................................................................................................................................................................... 1 INTRODUCTION.............................................................................................................................................................................................................................. 1 DESCRIPTION OF MAP UNITS .................................................................................................................................................................................................. 3 Quaternary Deposits ............................................................................................................................................................................................................ 3 Cretaceous Rocks .................................................................................................................................................................................................................. 7 Jurassic Rocks ......................................................................................................................................................................................................................... 9 Morrison Formation .................................................................................................................................................................................................... 9 Curtis Formation .........................................................................................................................................................................................................10 Entrada Sandstone .....................................................................................................................................................................................................11 Carmel Formation ......................................................................................................................................................................................................11 Glen Canyon Group ....................................................................................................................................................................................................12 Jurassic-Triassic Rocks ......................................................................................................................................................................................................12 Triassic Rocks .......................................................................................................................................................................................................................13 Permian Rocks ......................................................................................................................................................................................................................14 Pennsylvanian Rocks .........................................................................................................................................................................................................14 STRUCTURAL GEOLOGY ...........................................................................................................................................................................................................16 Salt Walls and Salt Anticlines .........................................................................................................................................................................................16 Anticlines and Synclines...................................................................................................................................................................................................17 Moab Valley Salt Structure ..............................................................................................................................................................................................17 Cache and Salt Valley Salt Structure ............................................................................................................................................................................17 Rollovers .................................................................................................................................................................................................................................17 Elephant Butte Folds..........................................................................................................................................................................................................18 Salt Wash Syncline ..............................................................................................................................................................................................................18 Courthouse Syncline ..........................................................................................................................................................................................................18 Windows Anticline .............................................................................................................................................................................................................18 Moab Valley Faults and Joints ........................................................................................................................................................................................18 Yellow Cat Dome and Graben .........................................................................................................................................................................................18 Joints .........................................................................................................................................................................................................................................18 GEOLOGIC HISTORY OF THE PARADOX BASIN ...............................................................................................................................................................19 SUMMARY OF ECONOMIC RESOURCES .............................................................................................................................................................................19 Vanadium and Uranium ....................................................................................................................................................................................................19 Copper ......................................................................................................................................................................................................................................21