Cretaceous Shelf Sandstones and Shelf Depositional Sequences, Western Interior Basin, Utah, Colorado and New Mexico Salt Lake City, Utah to Albuquerque, New Mexico June 30-July 7, 1989 Field Trip Guidebook Tl 19 Leaders: Dag Nummedal, Editor Robyn Wright Associate Leaders: Rex Cole Robert Retny, Editor American Geophysical Union, Washington, D.C.
COVER Outcrop of the Gallup Sandstone at Nose Rock Point, New Mexico. See Stop 20 for details. Leaders: Dag Nummedal Department of Geology & Geophysics Louisiana State University Baton Rouge, LA 70803 Robyn Wright Department of Geology University of New Mexico Albuquerque, NM 87131 Associate Leaders: Rex Cole UNOCAL 326 S. Valencia Brea, CA 92621 Robert Remy Department of Geology & Geophysics Louisiana State University Baton Rouge, LA 70803 Copyright 1989 American Geophysical Union 2000 Florida Ave., N.W., Washington, D.C. 20009 ISBN: 0-87590-629-X Printed in the United States of America
TABLE OF CONTENTS FIELD TRIP ITINERARY PREFACE Page vi viii CHAPTER 1. DELTAIC AND LACUSTRINE FACIES OF THE GREEN RIVER FORMATION, SOUTHERN UINTA BASIN, UTAH 1 Robert R. Remy Introduction 1 Stop 2. Tucker Rest Area. Fine-Grained Marginal-Lacustrine and Open-Lacustrine Facies 1 Field Guide to Nine Mile Canyon 2 Stop 3. Carbonate Marker Unit (Mile 31.7) 3 Stop 4. Transgressive/Regressive Cycles and Depositional Environments (Mile 39.8) 4 Stop 5. Deltaic Facies (Mile 53.4) 8 Stop 6. Shallow-Lacustrine Facies (Mile 58.7) 10 CHAPTER 2. STRATIGRAPHY AND SEDIMENTATION OF THE BOOK CLIFFS, UTAH 13 RexD. Cole and James F. Friberg Introduction 13 Late Cretaceous Depositional Setting 14 Stop 1. Red Narrows. Castlegate Sandstone 15 Stop 7. Helper Overlook. Book Cliffs Stratigraphy 16 Stop 8. Gilson Gulch. Blackhawk Formation 18 Stop 9. Price River Canyon. Castlegate Sandstone 19 Stop 10. Thompson Canyon. Blackhawk Formation and Castlegate Sandstone 20 Stops 11 (Dead Horse Point) and 12 (Arches National Monument) 23 CHAPTER 3. COASTAL AND SHALLOW MARINE CYCLICITY 25 Robyn Wright, Danny Katzman, Melissa J. Montz, Robert S. Zech Cycle Ranking 25 High-Frequency Pelagic Cycles 25 High-Frequency Nearshore Cycles 26 Possible Forcing Mechanisms 27 Stop 13. Mancos Canyon. Point Lookout Sandstone 28 CHAPTER 4. DEPOSITIONAL SYSTEMS ARCHITECTURE OF SHALLOW MARINE SEQUENCES 35 Dag Nummedal, Robyn Wright, Donald J. P. Swift, Roderick W. Tillman, and Niels R. Wolter Sequence Stratigraphic Concepts 35 San Juan Basin Chronostratigraphy 38 Stop 14. Ship Rock Wash. Stratigraphy of Gallup and Tocito Sandstones 38 Stop 15. Hogback Oil Field. Tocito Sandstone 45 Stop 16. Chaco River. Tocito Sandstone 48 Stop 17. Chaco Culture National Historic Park 50 Stop 18. Chaco Canyon. Cliff House Sandstone 53 Stop 19. Borrego Pass. Borrego Pass Sandstone 54 Stop 20. Nose Rock Point. Gallup Sandstone 59 Stop 21. Cliff-Face East of Nose Rock Point. Gallup Sandstone 64 iii
Stop 22. Ambrosia Lake. Borrego Pass Sandstone Stop 23. Canipa Mesa. Twowells Tongue of Dakota Sandstone Stop 24. South Oak Canyon Mesa. K/J Boundary REFERENCES (FOR ENTIRE GUIDEBOOK) iv
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FIELD TRIP ITINERARY June 30 (Fri.). Trip begins at Salt Lake City 3:00-5:30 p.m. Overview lectures at hotel. Reservations: Holiday Inn, Salt Lake City Airport July 1 (Sat.). Leave Salt Lake City at 7:30 a.m. Stop 1. Stop 2. Stop 3. Stops 4-6. Red Narrows Tucker rest area Carbonate Marker Unit Lunch Stop Nine Mile Canyon Arrive in Price at 6:30 p.m. Reservations: Radissonlnn July 2 (Sun.). Leave Price at 7:30 a.m. Stop 7. Helper Stop 8. Gilson Gulch Stop 9. Price River Canyon Lunch Stop near Helper Drive through Price past Woodside and Green River to Thompson Canyon. Arrive Thompson Canyon no later than 3 p.m. Stop 10. Thompson Canyon Return to Green River at 6:30 p.m. Reservations: Best Western River Terrace July 3 (Mon.) Leave Green River at 7:30 a.m. Stop 11. Stop 12. Deadhorse Point State Park Arches National Park. Stops at "fossil dunes" of the Navajo Sandstone along the Windows Road. Also a brief stop in the breached Salt Valley anticline. Lunch stop Drive from Arches National Park to Mancos Canyon near Cortez (137 miles, 2.5 hrs) Stop 13. 5:00 p.m. Mancos Canyon. Dinner (catered) in canyon Return to Cortez at 9:30 p.m. Reservations: Best Western July 4 (Tue.) Stop 14. Stop 15. Stop 16. Leave Cortez at 7:30 a.m. Ship Rock Wash. Lunch at Ship Rock dike Hogback oil field Chaco River Arrive at Farmington at 5:30 p.m. Reservations: The Inn (Best Western) July 5 (Wed.) Leave Farmington at 7:30 a.m. Stop 17. Stop 18. Stop 19. Chaco Canyon. Visit Pueblo Bonito and Casa Rinconada and view movie on Anasazi at visitor center. Lunch stop Cliff House Sandstone at Gallo Wash Borrego Pass trading post Dinner (catered) at Red Rock State Park picnic grounds. Arrive Gallup at 9:30 p.m. Reservations: The Inn (Best Western) vi
July 6 (Thu.) Stop 20. Stop 21. Leave Gallup at 7:30 a.m. Nose Rock Point. Lunch stop Cliff-face east of Nose Rock Point Arrive at Grants at 6:30 p.m. Reservations: The Inn (Best Western) July 7 (Fri.). Leave Grants at 7:30 a.m. Stop 22. Ambrosia Lake Stop 23. Canipa Mesa Lunch stop at Pueblo of Laguna Stop 24. South Oak Canyon Mesa Arrive in Albuquerque at 4 p.m. Open evening. Reservations: Sheraton, Old Town vii