Abstract Introduction Faults Formed by Shearing Along Preexisting
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Oligocene and Miocene), in Southern Nevada and Northwest Arizona D.G
New K-Ar age determinations from syntectonic deposits (Oligocene and Miocene), in southern Nevada and northwest Arizona D.G. Carpenter and J.G. Carpenter Isochron/West, Bulletin of Isotopic Geochronology, v. 55, pp. 10-12 Downloaded from: https://geoinfo.nmt.edu/publications/periodicals/isochronwest/home.cfml?Issue=55 Isochron/West was published at irregular intervals from 1971 to 1996. The journal was patterned after the journal Radiocarbon and covered isotopic age-dating (except carbon-14) on rocks and minerals from the Western Hemisphere. Initially, the geographic scope of papers was restricted to the western half of the United States, but was later expanded. The journal was sponsored and staffed by the New Mexico Bureau of Mines (now Geology) & Mineral Resources and the Nevada Bureau of Mines & Geology. All back-issue papers are available for free: https://geoinfo.nmt.edu/publications/periodicals/isochronwest This page is intentionally left blank to maintain order of facing pages. 10 NEW K-Ar AGE DETERMINATIONS FROM SYNTECTONIC DEPOSITS (OLIGOCENE AND MIOCENE), IN SOUTHERN NEVADA AND NORTHWEST ARIZONA DANIEL G. CARPENTER Department of Geology, Oregon State University, Corvaiiis, OR 97331-5506 JAMES G. CARPENTER Present address: Mobii Exploration and Producing U.S. inc., 1225 17th Street, Denver, CO 80202 Four new K-Ar age determinations were obtained on plagioclase, rare K-feldspar, quartz and biotite shards, and Cenozoic syntectonic deposits that are important to struc rare lithic fragments in a partially devitrified groundmass. tural and stratigraphic investigations in the southern These beds Me up section from the basal limestone and Nevada, southwest Utah, and northwest Arizona region. -
Utah Geological Association Publication 30.Pub
Utah Geological Association Publication 30 - Pacific Section American Association of Petroleum Geologists Publication GB78 239 CENOZOIC EVOLUTION OF THE NORTHERN COLORADO RIVER EXTEN- SIONAL CORRIDOR, SOUTHERN NEVADA AND NORTHWEST ARIZONA JAMES E. FAULDS1, DANIEL L. FEUERBACH2*, CALVIN F. MILLER3, 4 AND EUGENE I. SMITH 1Nevada Bureau of Mines and Geology, University of Nevada, Mail Stop 178, Reno, NV 89557 2Department of Geology, University of Iowa, Iowa City, IA 52242 *Now at Exxon Mobil Development Company, 16825 Northchase Drive, Houston, TX 77060 3Department of Geology, Vanderbilt University, Nashville, TN 37235 4Department of Geoscience, University of Nevada, Las Vegas, NV 89154 ABSTRACT The northern Colorado River extensional corridor is a 70- to 100-km-wide region of moderately to highly extended crust along the eastern margin of the Basin and Range province in southern Nevada and northwestern Arizona. It has occupied a criti- cal structural position in the western Cordillera since Mesozoic time. In the Cretaceous through early Tertiary, it stood just east and north of major fold and thrust belts and also marked the northern end of a broad, gently (~15o) north-plunging uplift (Kingman arch) that extended southeastward through much of central Arizona. Mesozoic and Paleozoic strata were stripped from the arch by northeast-flowing streams. Peraluminous 65 to 73 Ma granites were emplaced at depths of at least 10 km and exposed in the core of the arch by earliest Miocene time. Calc-alkaline magmatism swept northward through the northern Colorado River extensional corridor during early to middle Miocene time, beginning at ~22 Ma in the south and ~12 Ma in the north. -
Characterization of Hydraulic Properties Of
Final Report for Award No. DE-FG03-94ER14462 1 Structural Heterogeneities and Paleo Fluid Flow in an Analog Sandstone Reservoir 2001-2004 By David Pollard and Atilla Aydin Department of Geological and Environmental Sciences Stanford University Stanford, California DOE, BES, and Chemical Sciences, Geosciences, and Biosciences Division Final Report for Award No. DE-FG03-94ER14462 2 TABLE OF CONTENTS TABLE OF CONTENTS ............................................................................................................................................2 EXECUTIVE SUMMARY.........................................................................................................................................3 INTRODUCTION AND BACKGROUND ...............................................................................................................4 GEOLOGIC AND STRUCTURAL SETTING .....................................................................................................................4 Regional Geology.................................................................................................................................................4 Principal Structural Elements of the Aztec Sandstone.........................................................................................5 SUMMARY RESULTS FROM THE GRANT PERIOD ........................................................................................6 1. CHEMICAL CHARACTERIZATION OF COLORED ALTERATION BANDS AND PALEO FLUID FLOW .................................6 2. CHARACTERIZING -
Regional Stratigraphy of Oligocene and Lower Miocene Strata in the Yucca Mountain Region
* *0Ad REGIONAL STRATIGRAPHY OF OLIGOCENE AND LOWER MIOCENE STRATA IN THE YUCCA MOUNTAIN REGION Prepared for U.S. Nuclear Regulatory Commission Contract NRC-02-97-009 Prepared by Danielle A. Murray John A. Stamatakos Kenneth D. Ridgway Center for Nuclear Waste Regulatory Analyses San Antonio, Texas July 2002 CONTENTS Section Page FIGURES ............... ................ TABLES ................ ................ .vii ACKNOWLEDGMENTS .... ................ ..... ix EXECUTIVE SUMMARY .... ................ ..... xi 1 INTRODUCTION ...... ................ .... 1-1 1.1 Purpose........ ................ .... 1-1 1.2 Scope ......... ................ .... 1-2 2 GEOLOGIC SETTING .. 2-1 OLIGOCENE AND LOWER MIOCENE STRATIGRAPHY ..... 3-1 ...... 3 . 3.1 Outcrop Stratigraphy ............................ 3-1 ...... 3.1.1 Funeral Mountains ....................... ...... 3.1.2 Nevada Test Site ........................ 3-7 ...... 3.1.3 Oligocene and Lower Miocene Lithostratigraphy . ..... 3.2 Subsurface Stratigraphy ......................... 3-12 ..... 3.2.1 Nye County Well NC-EWDP-1 DX ........... 3-13 ..... 3.2.2 Nye County Well NC-EWDP-2DB ........... 3-15 ..... 3.2.3 Nye County Well NC-EWDP-3D ............ ..... 3.3 Correlation of Well Stratigraphy to Outcrop Exposures . ..... 3.3.1 Nye County Well NC-EWDP-2DB ........... ..... 3.3.2 Nye County Well NC-EWDP-1 DX ........... ..... 3.3.3 Nye County Well NC-EWDP-3D ............ ..... 4 CROSS SECTIONS ......................................... ........... 4.1 Regional Cross Section ................................ -
Importance of Groundwater in Propagating
CRevolution 2: Origin and Evolution of the Colorado River System II themed issue Crossey et al. Importance of groundwater in propagating downward integration of the 6–5 Ma Colorado River system: Geochemistry of springs, travertines, and lacustrine carbonates of the Grand Canyon region over the past 12 Ma L.C. Crossey1, K.E. Karlstrom1, R. Dorsey2, J. Pearce3, E. Wan4, L.S. Beard5, Y. Asmerom1, V. Polyak1, R.S. Crow1, A. Cohen6, J. Bright6, and M.E. Pecha6 1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico, 87131, USA 2Department of Geological Sciences, 1272 University of Oregon, Eugene, Oregon 97403-1272, USA 3U.S. Forest Service, Grand Mesa, Uncompahgre and Gunnison National Forests, Paonia Ranger District, 403 North Rio Grande Avenue, P.O. Box 1030, Paonia, Colorado 81428, USA 4U.S. Geological Survey, 345 Middlefield Road, MS977, Menlo Park, California 94025, USA 5U.S. Geological Survey, 2255 North Gemini Drive, Flagstaff, Arizona 86001, USA 6Department of Geosciences, The University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721, USA ABSTRACT travertines, suggesting a long-lived spring- basins. Bouse carbonates display a southward fed lake/marsh system sourced from western trend toward less radiogenic 87Sr/86Sr values, We applied multiple geochemical tracers Colorado Plateau groundwater. Progressive higher [Sr], and heavier d18O that we attribute (87Sr/86Sr, [Sr], d13C, and d18O) to waters and up-section decrease in 87Sr/86Sr and d13C and to an increased proportion of Colorado River carbonates of the lower Colorado River sys- increase in d18O in the uppermost 50 m of the water through time plus increased evapora- tem to evaluate its paleohydrology over the Hualapai Limestone indicate an increase in tion from north to south. -
Locally Intruded by Late Mesozoic (@93 M.Y.BP) Plutonic Rocks Related Ti the Sierra Nevada Batholith
—-...--...——.—— LA-10428-MS ! CIC-14REPORT COLLECTION C3* Reproduction COPY :,;-.+Z;LJJ I .—.— .n.Tm—. Los Alamos Nationel Laboratory IS operated by the Unlverslty 01 California for the Uruted States Department of Energy undercontiact W-7405 .ENG-36. ,- ~.. ., . ,.. -. ,. .. .— - “- , . .,, i. ,, . .. ,.- . ... ,<.- . ...-;; . .: : . .. ,.:-” ,,,.,, , -; ,. ,. ., , .,-,. .N, u , ,,“~ : “,,; ,’...... .,, .!. ,,,.. , ., . .., .. ... # ,,.. .. ,,. .. ,. .- . “. ,, ‘..,.,.Nevada Test Site Field Trip (iuidebook .-, ,. ,. ,., , ..,,..,,“ :. .,,4,,d. .,}.., , .. “:.,-. ! ————. 1984 .--.—.. -:----s ● H.-: - -r., -. .,% .~hd.? I ..-.— —. .. — . .— —.— —...——— LosAlamosNationalLaboratory LosAllallT10sLosAlamos,NewMexico87545 k AffiitiveActlosa/Equdt)p@UOity fh@oyS?S This work was supported by the US Department of Energy, Waste Management Program/Nevada Operations Ofiiee and Los Alamos Weapons Development Pro- gram/Test Operations. Edited by Glenda Ponder, ESSDivision DISCLAIMER Thisreport waspreparedas an accountof work sponsoredby an agencyof the LhdtedStatesCoverrrment. Neitherthe UnitedStates Governmentnor any agencythereof, nor any of their employees,makesany warranty,expressor irnpIied,or assumesany Iegatliabilityor responsibilityfor the accuracy,wmpletenesa, or usefutncasof any information,apparatus,product, or processdisclosed,or representsthat i!ausewould not infringeprivatelyownedrights. Reference hereinto any specificcommercialproduct, process,or serviceby trade name,trademark,manufacturer,or otherwise,doesnot newaaarilywnatitute or Irssplyits -
The Geology of the Nevada Test Site and Surrounding Area
The Geology of the Nevada Test Site and Surrounding Area Clark and Nye Counties, Nevada July 5-7, 1989 Field Trip Guidebook T 186 Leaders: H. Lawrence McKague Paul P Orkild Steven R Mattson Contributions By: F M. Byers Bruce M. Crowe E. D. Davidson Holly A. Dockery Terry A. Grant E. L Hardin Robert A. Levich A. C Matthusen Robert C Murray H. A. Perry Donna Sinks American Geophysical Union, Washington, D.C. Copyright 1989 American Geophysical Union 2000 Florida Ave., N.W., Washington, D.C. 20009 ISBN: 0-87590-636-2 Printed in the United States of America THe Geology of the Nevada Test Site and Surrounding Area COVER A view southeast across Mercury, NV towards the snow covered Spring Mountains. Mt. Charleston is the high peak in the Spring Mountains near the left edge of the photograph. The bare ridge Just beyond Mercury is the southwestern extension of the Spotted Range. Mercury Valley is the northwest extension of the Las Vegas shear zone. Leaders: Lawrence McKague Lawrence Livermore National Laboratory P.O. Box 279, L-279 Livermore, CA 94550 Paul Orkild U.S. Geological Survey Steven Mattson S.A.I.C. Suite 407 Valley Bank Building 101 Convention Center Dr. Las Vegas, NV 89109 IGC FIELD TRIP T186 THE GEOLOGY OF THE NEVADA TEST SITE AND SURROUNDING AREA: A FIELD TRIP FOR THE 28th INTERNATIONAL GEOLOGICAL CONGRESS H. Lawrence McKague(l), Paul P. Orkild(2), Steven R. Mattson(3) With Contributions by F. M,. Byers(4), Bruce M. Crowe(4), E. D. Davidson(3) Holly A. Dockery (1), Terry A. -
GEOLOGIC MAP of the LITTLEFIELD 30' X 60' QUADRANGLE, MOHAVE COUNTY, NORTHWESTERN ARIZONA by George H
U.S. DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP I-2628 U.S. GEOLOGICAL SURVEY Version 1.0 GEOLOGIC MAP OF THE LITTLEFIELD 30' x 60' QUADRANGLE, MOHAVE COUNTY, NORTHWESTERN ARIZONA By George H. Billingsley and Jeremiah B. Workman INTRODUCTION 10 km north of the north-central part of the map and are the largest settlements near the map area. This map is one result of the U.S. Geological Survey's Interstate Highway 15 and U.S. Highway 91 provide intent to provide geologic map coverage and a better under access to the northwest corner of the map area, and Arizona standing of the transition in regional geology between the State Highway 389 provides access to the northeast corner. Basin and Range and Colorado Plateaus in southeastern Ne Access to the rest of the map area is by dirt roads maintained vada, southwestern Utah, and northwestern Arizona. Infor by the U.S. Bureau of Land Management, Arizona Strip Dis mation gained from this regional study provides a better trict, St. George, Utah. The area is largely managed by the understanding of the tectonic and magmatic evolution of an U.S. Bureau of Land Management, the Arizona Strip Dis area of extreme contrasts in late Mesozoic-early Tertiary trict, which includes sections of land controlled by the State compression, Cenozoic magmatism, and Cenozoic extension. of Arizona. There are several isolated sections of privately This map is a synthesis of 32 new geologic maps encom owned lands, mainly near the communities of Littlefield, passing the Littlefield 30' x 60' quadrangle, Arizona. -
Jurassic Tetrapod Footprint Ichnofaunas and Ichnofacies of the Western Interior, USA
Volumina Jurassica, 2014, Xii (2): 133–150 Doi: 10.5604/17313708 .1130134 Jurassic tetrapod footprint ichnofaunas and ichnofacies of the Western Interior, USA Martin LOCKLEY1, Gerard GIERLINSKI2 Key words: Jurassic, footprints, ichnofacies, dinosaurs, pterosaurs, Western Interior. Abstract. The Jurassic tetrapod track record of the Western Interior, USA, is one of the most diverse, complete and well-studied in the world, spanning a relatively continuous representation of Lower, Middle and Upper Jurassic formations. Although a few of these forma- tions, notably the Morrison Formation, have yielded abundant body fossils, the majority lack abundant skeletal remains and, while track- rich, are in some cases completely barren of body fossils. Thus, the track record assumes great importance as the most complete and repre- sentative record of changing tetrapod faunas through time in a region where the body fossil record is often sparse or absent. In the Lower and Middle Jurassic, many distinctive assemblages are associated with eolian units (Wingate, Navajo and Entrada) that are almost devoid of body fossils. However, the former two units are rich in synapsid tracks characterized as the Brasilichnium ichnofacies. In the Middle Jurassic, fluctuating sea-levels exerted important controls on the distribution of theropod and pterosaur-dominated ichnofaunas associated with coastal plain and marginal marine settings. The Morrison ichnofauna is a reliable reflection of the body fossil record of that formation. Ongoing efforts to group and classify the various tetrapod ichnofaunas into tetrapod ichnofacies and tetrapod biochron categories have, in some cases, provoked stimulating, if sometimes inconclusive, debate. INTRODUCTION widespread evidence of life in the various eolian and mar- ginal marine paleoenvironments that prevailed throughout The Jurassic of the Western Interior of the USA is histori- much of the Early and Middle Jurassic. -
Formations Between Southwestern Utah and Southern Nevada
Correlation of Upper Triassic and Triassic(P) Formations Between Southwestern Utah and Southern Nevada By RICHARD F. WILSON and JOHN H. STEWART CONTRIBUTIONS TO STRATIGRAPHY GEOLOGICAL SURVEY BULLETIN 1244-D Based on work done on behalf of the U.S. Atomic Energy Commission UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1967 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 15 cents CONTENTS Page Abstract_______-_____-__-__-_-_-___-__-____---_---__-__-___---_ Dl Introduction..-________________________________________________ 1 Stratigraphic terminology_________________________________________ 3 Moenkopi Formation._________________________________________ 7 Upper unit of Moenkopi(?) Formation___________________________ 8 Chinle Formation________________________________________________ 8 Shinarump Member_______________________________-_____-_____ 10 Petrified Forest Member and probable equivalent__________.-_-__ 11 Chinle Formation (restricted)-Glen Canyon Group contact _____________ 13 Glen Canyon Group and probable equivalents_.__________--___--____ 14 Moenave and Kayenta Formations and probable equivalents______ 14 Southwestern Utah________________________________________ 15 Southern Nevada________________________________________ 17 Navajo Sandstone and Aztec Sandstone__________________________ 18 References cited___________________________________________________ -
Stratigraphic Relations of the Navaio Sandstone to Middle Jurassic
Stratigraphic Relations of the Navaio%j Sandstone to Middle Jurassic Formations, Southern Utah and Northern Arizona G E O L O G I C A1 SURVEY PRO FES S;i ONAt PAPER 1035-B Stratigraphic Relations of the Navajo Sandstone to Middle Jurassic Formations, Southern Utah and Northern Arizona By FRED PETERSON and G. N. PIPIRINGOS UNCONFORMITIES, CORRELATION, AND NOMENCLATURE OF SOME TRIASSIC AND JURASSIC ROCKS, WESTERN INTERIOR UNITED STATES GEOLOGICAL SURVEY PROFESSIONAL PAPER1035-B A reexamination of the stratigraphy offormations that lie on the Navajo Sandstone UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1979 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY H. WUliam Menard, Director Library of Congress Cataloging in Publication Data Peterson, Fred. Stratigraphic relations of the Navajo Sandstone to Middle Jurassic formations, southern Utah and northern Arizona. (Geological Survey Professional Paper 103 5-B) (Unconformities, correlation, and nomenclature of some Triassic and Jurassic rocks, western interior United States) Bibliography: p. 42 Supt. of Docs, no.: 119.16 1035-B 1. Geology, Stratigraphic Jurassic. 2. Geology Utah. 3. Geology Arizona. I. Pipiringos, George Nicholas, 1918- joint author. II. Title III. Series. IV. Series ; United States Geological Survey Professional Paper 1035-B. QE681.P42 551.7'6 77-608321 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-03198-1 CONTENTS Page Abstract......................... Bl San Rafael Group Continued Introduction and acknowledgments 2 Carmel Formation Continued Glen Canyon Group............... 4 Upper member .................................. B17 Navajo Sandstone ............ 4 Page Sandstone ................... .............. 20 San Rafael Group.................. 6 Harris Wash Tongue.......... -
Kinematic Evolution of a Large-Offset Continental Normal Fault System, South Virgin Mountains, Nevada
Kinematic evolution of a large-offset continental normal fault system, South Virgin Mountains, Nevada Robert Brady* Brian Wernicke Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA Joan Fryxell Department of Geological Sciences, California State University, San Bernardino, California 92407, USA ABSTRACT examination of other areas suggests that the John and Foster, 1993); others may have ini- evolutionary sequence seen in the South tiated with steep dips and remained active as The South Virgin Mountains and Grand Virgin Mountains may, in fact, be widely they tilted to shallow dips. Tilting of these Wash trough comprise a mid-Miocene nor- applicable. faults is probably due to combined domino- mal fault system that de®nes the boundary style tilting and isostatically driven footwall between the unextended Colorado Plateau Keywords: Egan Range, kinematics, Lemi- ¯exure (Fig. 1C). Many gently dipping normal to the east and highly extended crust of the tar Mountains, normal faults, South Virgin faults might be best interpreted this way, rath- central Basin and Range province to the Mountains, Yerington. er than invoking rotation by younger struc- west. In the upper 3 km of the crust, the tures. system developed in subhorizontal cratonic INTRODUCTION Detailed geologic studies were conducted in strata in the foreland of the Cordilleran the South Virgin Mountains of southeastern fold and thrust system. The rugged topog- Geologic mapping in the Basin and Range Nevada and northwestern Arizona (Fig. 2), a raphy and lack of vegetation of the area af- province has shown that gently dipping nor- region well suited for testing existing kine- ford exceptional three-dimensional expo- mal faults are common (e.g., Longwell, 1945; matic models of normal faulting.