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PRELUDE to SEVEN SLOTS: FILLING and SUBSEQUENT MODIFICATION of SEVEN BROAD CANYONS in the NAVAJO SANDSTONE, SOUTH-CENTRAL UTAH by David B
PRELUDE TO SEVEN SLOTS: FILLING AND SUBSEQUENT MODIFICATION OF SEVEN BROAD CANYONS IN THE NAVAJO SANDSTONE, SOUTH-CENTRAL UTAH by David B. Loope1, Ronald J. Goble1, and Joel P. L. Johnson2 ABSTRACT Within a four square kilometer portion of Grand Staircase-Escalante National Monument, seven distinct slot canyons cut the Jurassic Navajo Sandstone. Four of the slots developed along separate reaches of a trunk stream (Dry Fork of Coyote Gulch), and three (including canyons locally known as “Peekaboo” and “Spooky”) are at the distal ends of south-flowing tributary drainages. All these slot canyons are examples of epigenetic gorges—bedrock channel reaches shifted laterally from previous reach locations. The previous channels became filled with alluvium, allowing active channels to shift laterally in places and to subsequently re-incise through bedrock elsewhere. New evidence, based on optically stimulated luminescence (OSL) ages, indicates that this thick alluvium started to fill broad, pre-existing, bedrock canyons before 55,000 years ago, and that filling continued until at least 48,000 years ago. Streams start to fill their channels when sediment supply increases relative to stream power. The following conditions favored alluviation in the study area: (1) a cooler, wetter climate increased the rate of mass wasting along the Straight Cliffs (the headwaters of Dry Fork) and the rate of weathering of the broad outcrops of Navajo and Entrada Sandstone; (2) windier conditions increased the amount of eolian sand transport, perhaps destabilizing dunes and moving their stored sediment into stream channels; and (3) southward migration of the jet stream dimin- ished the frequency and severity of convective storms. -
Biochronology of the Triassic Tetrapod Footprints
Geological Society, London, Special Publications Tetrapod footprints - their use in biostratigraphy and biochronology of the Triassic Hendrik Klein and Spencer G. Lucas Geological Society, London, Special Publications 2010; v. 334; p. 419-446 doi:10.1144/SP334.14 Email alerting click here to receive free email alerts when new articles cite this service article Permission click here to seek permission to re-use all or part of this article request Subscribe click here to subscribe to Geological Society, London, Special Publications or the Lyell Collection Notes Downloaded by on 15 June 2010 © 2010 Geological Society of London Tetrapod footprints – their use in biostratigraphy and biochronology of the Triassic HENDRIK KLEIN1,* & SPENCER G. LUCAS2 1Ru¨bezahlstraße 1, D-92318 Neumarkt, Germany 2New Mexico Museum of Natural History, 1801 Mountain Road NW, Albuquerque, NM 87104-1375 USA *Corresponding author (e-mail: [email protected]) Abstract: Triassic tetrapod footprints have a Pangaea-wide distribution; they are known from North America, South America, Europe, North Africa, China, Australia, Antarctica and South Africa. They often occur in sequences that lack well-preserved body fossils. Therefore, the question arises, how well can tetrapod footprints be used in age determination and correlation of stratigraphic units? The single largest problem with Triassic footprint biostratigraphy and biochronology is the non- uniform ichnotaxonomy and evaluation of footprints that show extreme variation in shape due to extramorphological (substrate-related) phenomena. Here, we exclude most of the countless ichnos- pecies of Triassic footprints, and instead we consider ichnogenera and form groups that show distinctive, anatomically-controlled features. Several characteristic footprint assemblages and ichnotaxa have a restricted stratigraphic range and obviously occur in distinct time intervals. -
Rock Layers of the Monument
ROCK LAYERS OF THE MONUMENT The rocks of Colorado National Monument record a fascinating story of mountain building, enormous amounts of erosion, and changing climates, as the continent of North America gradually moved northward toward its present position. PRECAMBRIAN The dark-colored rock at the bottom of the with the overlying red sedimentary rocks. canyons is Precambrian in age, dated at The record of about 1.5 billion years of 1. 7 billion years old. These rocks were earth's history is missing! We know from originally sedimentary rocks, but were surrounding areas that this region was changed into metamorphic rocks and partly uplifted into a major mountain range which, melted into igneous rocks when the area that after hundreds of millions of years, was is now Colorado collided with ancient finally eroded low enough that sediments North America and became part of the could be deposited where the mountains continent. There is a huge gap in the once stood. geologic record at the contact of these rocks The lowest and oldest layer of sedimentary deposits, the Chinle Formation records a TRIASSIC rock is the Chinle Formation. Comprised time when this area was close to the equator. chiefly of red stream and floodplain JURASSIC As the continent slowly drifted northward, After Entrada time, a succession of lake and the climate changed and desert conditions stream deposits formed, beginning with the prevailed. The towering cliffs of the wind Wanakah Formation and followed by the deposited (eolian) Wingate Sandstone Morrison Formation. preserve the remnants of sand dunes Here at Colorado National Monument, the formed in that desert. -
Hydrogeology of the Chinle Wash Watershed, Navajo Nation Arizona, Utah and New Mexico
Hydrogeology of the Chinle Wash Watershed, Navajo Nation Arizona, Utah and New Mexico Item Type Thesis-Reproduction (electronic); text Authors Roessel, Raymond J. Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 07/10/2021 19:50:22 Link to Item http://hdl.handle.net/10150/191379 HYDROGEOLOGY OF THE CHINLE WASH WATERSHED, NAVAJO NATION, ARIZONA, UTAH AND NEW MEXICO by Raymond J. Roessel A Thesis Submitted to the Faculty of the DEPARTMENT OF HYDROLOGY AND WATER RESOURCES In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE WITH A MAJOR IN HYDROLOGY In the Graduate College THE UNIVERSITY OF ARIZONA 1994 2 STATEMENT BY AUTHOR This thesis has been submitted in partial fulfillment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his or her judgment the proposed use of the material is in the interests of scholarship. In all other instances, however, permission must be obtained from the author. -
GEOLOGY and GROUND-WATER SUPPLIES of the FORT WINGATE INDIAN SCHOOL AREA, Mckinley COUNTY, NEW MEXICO
GEOLOGICAL SURVEY CIRCULAR 360 GEOLOGY AND GROUND-WATER SUPPLIES OF THE FORT WINGATE INDIAN SCHOOL AREA, McKINLEY COUNTY, NEW MEXICO PROPERTY OT§ tJ. B. EED! DGJCAL' SURVEY PUBLIC INQUIRIES OFFICE BAN FRANC1ECQ. CALIFORNIA Prepared in cooperation with the Bureau of Indian Affairs UNITED STATES DEPARTMENT OF THE INTERIOR Douglas McKay, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director GEOLOGICAL SURVEY CIRCULAR 360 GEOLOGY AND GROUND-WATER SUPPLIES OF THE FORT WINGATE INDIAN SCHOOL AREA, McKINLEY COUNTY, NEW MEXICO By J. T. Callahan and R. L. Cushman Prepared in cooperation with the Bureau of Indian Affairs Washington, D. C-, 1905 Free on application to the Geological Survey, Washington 25, D. C. GEOLOGY AND GROUND-WATER SUPPLIES OF THE FORT WINGATE INDIAN SCHOOL AREA, McKINLEY COUNTY, NEW MEXICO By J. T. Callahan and R. L. Cushman CONTENTS Page Page Abstract.................................................... 1 Geology and ground-water resources--Continued Introduction............................................... 2 Geologic structures--Continued Location, topography, and drainage............... 2 Faults..,................................................. 5 Geology and ground-water resources.............. 2 Ground water................................................ 5 Geologic formations and their water-bearing San Andres formation.................................. 5 properties........................................ 2 Recharge conditions................................. 5 Permian system................................... 4 Discharge -
Geology and Stratigraphy Column
Capitol Reef National Park National Park Service U.S. Department of the Interior Geology “Geology knows no such word as forever.” —Wallace Stegner Capitol Reef National Park’s geologic story reveals a nearly complete set of Mesozoic-era sedimentary layers. For 200 million years, rock layers formed at or near sea level. About 75-35 million years ago tectonic forces uplifted them, forming the Waterpocket Fold. Forces of erosion have been sculpting this spectacular landscape ever since. Deposition If you could travel in time and visit Capitol Visiting Capitol Reef 180 million years ago, Reef 245 million years ago, you would not when the Navajo Sandstone was deposited, recognize the landscape. Imagine a coastal you would have been surrounded by a giant park, with beaches and tidal flats; the water sand sea, the largest in Earth’s history. In this moves in and out gently, shaping ripple marks hot, dry climate, wind blew over sand dunes, in the wet sand. This is the environment creating large, sweeping crossbeds now in which the sediments of the Moenkopi preserved in the sandstone of Capitol Dome Formation were deposited. and Fern’s Nipple. Now jump ahead 20 million years, to 225 All the sedimentary rock layers were laid million years ago. The tidal flats are gone and down at or near sea level. Younger layers were the climate supports a tropical jungle, filled deposited on top of older layers. The Moenkopi with swamps, primitive trees, and giant ferns. is the oldest layer visible from the visitor center, The water is stagnant and a humid breeze with the younger Chinle Formation above it. -
Geologic History of the San Juan Basin Area, New Mexico and Colorado Edward C
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/1 Geologic history of the San Juan Basin area, New Mexico and Colorado Edward C. Beaumont and Charles B. Read, 1950, pp. 49-54 in: San Juan Basin (New Mexico and Colorado), Kelley, V. C.; Beaumont, E. C.; Silver, C.; [eds.], New Mexico Geological Society 1st Annual Fall Field Conference Guidebook, 152 p. This is one of many related papers that were included in the 1950 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Since 1950, the New Mexico Geological Society has held an annual Fall Field Conference that visits some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed papers. These books have set the national standard for geologic guidebooks and are an important reference for anyone working in or around New Mexico. Free Downloads The New Mexico Geological Society has decided to make our peer-reviewed Fall Field Conference guidebook papers available for free download. Non-members will have access to guidebook papers, but not from the last two years. Members will have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of the societies' operating budget. Therefore, only research papers will be made available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content will remain available only in the printed guidebooks. -
Stratigraphic Correlation Chart for Western Colorado and Northwestern New Mexico
New Mexico Geological Society Guidebook, 32nd Field Conference, Western Slope Colorado, 1981 75 STRATIGRAPHIC CORRELATION CHART FOR WESTERN COLORADO AND NORTHWESTERN NEW MEXICO M. E. MacLACHLAN U.S. Geological Survey Denver, Colorado 80225 INTRODUCTION De Chelly Sandstone (or De Chelly Sandstone Member of the The stratigraphic nomenclature applied in various parts of west- Cutler Formation) of the west side of the basin is thought to ern Colorado, northwestern New Mexico, and a small part of east- correlate with the Glorieta Sandstone of the south side of the central Utah is summarized in the accompanying chart (fig. 1). The basin. locations of the areas, indicated by letters, are shown on the index map (fig. 2). Sources of information used in compiling the chart are Cols. B.-C. shown by numbers in brackets beneath the headings for the col- Age determinations on the Hinsdale Formation in parts of the umns. The numbers are keyed to references in an accompanying volcanic field range from 4.7 to 23.4 m.y. on basalts and 4.8 to list. Ages where known are shown by numbers in parentheses in 22.4 m.y. on rhyolites (Lipman, 1975, p. 6, p. 90-100). millions of years after the rock name or in parentheses on the line The early intermediate-composition volcanics and related rocks separating two chronostratigraphic units. include several named units of limited areal extent, but of simi- No Quaternary rocks nor small igneous bodies, such as dikes, lar age and petrology—the West Elk Breccia at Powderhorn; the have been included on this chart. -
Mesozoic Stratigraphy at Durango, Colorado
160 New Mexico Geological Society, 56th Field Conference Guidebook, Geology of the Chama Basin, 2005, p. 160-169. LUCAS AND HECKERT MESOZOIC STRATIGRAPHY AT DURANGO, COLORADO SPENCER G. LUCAS AND ANDREW B. HECKERT New Mexico Museum of Natural History and Science, 1801 Mountain Rd. NW, Albuquerque, NM 87104 ABSTRACT.—A nearly 3-km-thick section of Mesozoic sedimentary rocks is exposed at Durango, Colorado. This section con- sists of Upper Triassic, Middle-Upper Jurassic and Cretaceous strata that well record the geological history of southwestern Colorado during much of the Mesozoic. At Durango, Upper Triassic strata of the Chinle Group are ~ 300 m of red beds deposited in mostly fluvial paleoenvironments. Overlying Middle-Upper Jurassic strata of the San Rafael Group are ~ 300 m thick and consist of eolian sandstone, salina limestone and siltstone/sandstone deposited on an arid coastal plain. The Upper Jurassic Morrison Formation is ~ 187 m thick and consists of sandstone and mudstone deposited in fluvial environments. The only Lower Cretaceous strata at Durango are fluvial sandstone and conglomerate of the Burro Canyon Formation. Most of the overlying Upper Cretaceous section (Dakota, Mancos, Mesaverde, Lewis, Fruitland and Kirtland units) represents deposition in and along the western margin of the Western Interior seaway during Cenomanian-Campanian time. Volcaniclastic strata of the overlying McDermott Formation are the youngest Mesozoic strata at Durango. INTRODUCTION Durango, Colorado, sits in the Animas River Valley on the northern flank of the San Juan Basin and in the southern foothills of the San Juan and La Plata Mountains. Beginning at the northern end of the city, and extending to the southern end of town (from north of Animas City Mountain to just south of Smelter Moun- tain), the Animas River cuts in an essentially downdip direction through a homoclinal Mesozoic section of sedimentary rocks about 3 km thick (Figs. -
Jurassic Navajo Sandstone, Glen Canyon National Recreation Area
JurassicJurassic NavajoNavajo Sandstone,Sandstone, GlenGlen CanyonCanyon NationalNational RecreationRecreation AreaArea –– OutcropOutcrop AnalogAnalog forfor thethe JurassicJurassic NuggetNugget SandstoneSandstone Reservoir,Reservoir, ThrustThrust BeltBelt NAVAJO SANDSTONE OUTCROP CHARACTERISTICS Spectacular contorted bedding in Navajo Sandstone; south side of Antelope Island in Lake Powell. Location of reservoirs that produce oil (green) and gas and condensate (red) from the Jurassic Nugget Sandstone, Utah and Wyoming. The Index map to Glen Canyon National Recreation Area, Utah Nugget Sandstone play area is dotted. and Arizona (modified from Hintze, 1997; topographic relief base map modified with permission, courtesy of Navajo Sandstone beds display pronounced trough Chalk Butte, Inc., Boulder, Wyoming). cross-bedding which indicates the paleowinds NUGGET SANDSTONE RESERVOIR were from the north and northwest. CHARACTERISTICS • Net pay – 70 to 1000 ft (21-300 m) • Depositional environments – eolian dune (straight-crested to sinuous, coalescing, transverse barchanoid ridges), interdune/playa • Lithology – dune deposits = sandstone (fine- to coarse-grained, subangular to subrounded sand or silt grains cemented by calcite), interdune/playa = sandstone and siltstone with some carbonate (limestone and dolomite) and evaporite • Pore types – intergrainular, fractures • Porosity - averages 11-15%, enhanced by natural fracture systems • Permeability – less than 1 md to 50 md, averaging 18 md Typical limestone oasis deposit near the top of the Navajo Sandstone; Forgotten Canyon. Mudcracks in oasis limestone mud above bed Rapid pinch out of thin limestone bed; Moki Canyon. • Framework and matrix grains in sandstone (>1/16 mm and 1/16 to 1/256 containing ripple marks; Forgotten Canyon. mm, respectively) and siltstone are commonly composed of more than 90 percent quartz (usually frosted) with varying amounts of K-feldspar, plagioclase, and rock fragments Photomicrographs (crossed nicols) of Navajo Sandstone oasis deposits. -
Diagenetic Coloration Facies and Alteration History of the Jurassic Navajo Sandstone, Zion National Park and Vicinity, Southwestern Utah
DIAGENETIC COLORATION FACIES AND ALTERATION HISTORY OF THE JURASSIC NAVAJO SANDSTONE, ZION NATIONAL PARK AND VICINITY, SOUTHWESTERN UTAH Gregory B. Nielsen, Marjorie A. Chan, and Erich U. Petersen Department of Geology and Geophysics University of Utah 115 S. 1460 E., Rm. 383 FASB Salt Lake City, Utah 84112-0102 [email protected] [email protected] [email protected] ABSTRACT Coloration patterns in the Jurassic Navajo Sandstone of Zion National Park and vicinity are examined using a broad variety of geochemical, geospatial, petrographic, and bedform analysis techniques. Six diagenetic coloration facies (including 12 subfacies) are defined and characterized. Results indicate a prolonged and complex diagenetic history with variations in color resulting largely from changes in the concentration and distri- bution of iron oxides. In the northern Kolob Plateau, the Navajo Sandstone has a uniform red pigmentation (red primary facies) that formed during early diagenesis to produce the “primary” sandstone color. In contrast, Navajo Sandstone of main Zion Canyon displays “secondary” alteration features occurring in three distinct vertical coloration facies: brown (lower), pink (middle), and white (upper). The white and pink facies in Zion Canyon are characterized by a combination of prevalent bleaching, areas of remnant “primary” sandstone, and small concretionary iron-enriched lenses. Bleaching is concentrated in the upper Navajo Sandstone where alteration occurred during middle diagenesis (deep burial). Widespread bleaching and alteration in Zion Canyon terminates abruptly in the central park but narrow, well-defined, white bleached bands locally follow high-permeability beds northward for several kilometers into the red-colored Kolob Plateau (red/white facies). The brown facies is characterized by widespread dark iron oxide cement concentrations precipitated beneath a well-defined subhorizontal boundary. -
The Geology of Quail Creek State Park Itself, the Park Is Surrounded by a Landscape of Enormous Geological and Human Interest
TT HH EE G E O L OO GG Y OO FF Q UU AA II LL C R E E K SS T A TT EE PP A R K T H E G E O L O G Y O F Q U A I L C R E E K S T A T E P A R K T H E GEOLO G Y O F Q UA IL CREEK STAT E PA R K by Robert F. Biek Introduction . 1 Layers of Rock. 3 Regional overview . 3 Moenkopi Formation . 4 Shnabkaib Member . 6 Upper red member . 7 Chinle Formation . 7 Shinarump Conglomerate Member . 7 Petrified Forest Member . 8 Surficial deposits . 9 Talus deposits . 9 Mixed river and slopewash deposits . 9 Landslides. 9 The Big Picture . 10 Geological Highlights . .14 Virgin anticline . .14 Faults . .14 Gypsum . .14 “Picture stone” . .15 Boulders from the Pine Valley Mountains . .16 Catastrophic failure of the Quail Creek south dike . .17 Acknowledgments . .19 References . .19 T H E G E O L O G Y O F Q U A I L C R E E K S T A T E P A R K I N T R O D U C T I O N The first thing most visitors to Quail Creek State Park notice, apart from the improbably blue and refreshing waters of the reservoir itself, are the brightly colored, layered rocks of the surrounding cliffs. In fact, Quail Creek State Park lies astride one of the most remarkable geologic features in southwest- ern Utah. The park lies cradled in the eroded core of the Virgin anticline, a long upwarp of folded rock that trends northeast through south-central Washington County.