Transition from Late Jurassic Rifting to Middle Cretaceous Dynamic Foreland, Southwestern U.S

Total Page:16

File Type:pdf, Size:1020Kb

Transition from Late Jurassic Rifting to Middle Cretaceous Dynamic Foreland, Southwestern U.S Transition from Late Jurassic rifting to middle Cretaceous dynamic foreland, southwestern U.S. and northwestern Mexico Timothy F. Lawton1,†, Jeffrey M. Amato2, Sarah E.K. Machin1, John C. Gilbert3, and Spencer G. Lucas4 1 Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78758, USA 2 Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA 3 Office of Management and Enterprise Services, State of Oklahoma, 2401 North Lincoln Boulevard, Suite 118, Oklahoma City, Oklahoma 73105, USA 4 New Mexico Museum of Natural History, 1801 Mountain Road, N.W., Albuquerque, New Mexico 87104, USA ABSTRACT renewed Albian–Cenomanian subsidence, the middle Cretaceous, an extensional tectonic set- arc continued to supply volcanic-lithic sand ting of northern Sonora, southern Arizona, and Subsidence history and sandstone prov- to the Altar-Cucurpe basin, which by then southwestern New Mexico contrasted with re- enance of the Bisbee basin of southwestern was the foredeep of the foreland basin. Sand- gional tectonics to the north, where crustal short- New Mexico, southern Arizona, and north- stone of the Bootheel basin is more quartzose ening of the Sevier orogeny was well under way ern Sonora, Mexico, demonstrate basin evo- than the Altar-Cucurpe basin, but uncommon by Aptian time in southern Nevada, Utah, and lution from an array of Late Jurassic–Early sandstone beds contain neovolcanic lithic Wyoming (Armstrong, 1968; Heller et al., 1986; Cretaceous rift basins to a partitioned middle fragments and young zircon grains that were Lawton, 1994; DeCelles, 2004; Yonkee and Cretaceous retroarc foreland basin. The fore- transported to the basin as airborne ash. Lat- Weil, 2015). Flexural subsidence adjacent to the land basin contained persistent depocenters est Albian–early Cenomanian U-Pb tuff ages, Sevier orogenic belt created an adjacent retroarc that were inherited from the rift basin array detrital zircon maximum depositional ages foreland basin (sensu Ingersoll, 2012), termed and determined patterns of Albian–early ranging from ca. 102 Ma to 98 Ma, and am- the Cordilleran foreland basin, whose foredeep Cenomanian sediment routing. Upper Ju- monite fossils all demonstrate equivalence of lay along the western flank of the epicontinental rassic and Valanginian–Aptian strata were middle Cretaceous proximal foreland strata Western Interior seaway (Jordan, 1981; Lawton, deposited in three narrow extensional basins, of the U.S.-Mexico border region with distal 1982, 1994; Robinson Roberts and Kirschbaum, termed the Altar-Cucurpe, Huachuca, and back-bulge strata of the Cordilleran foreland 1995; Currie, 1997, 1998). Dynamic topography Bootheel basins. Initially rapid Late Jurassic basin. Marine strata buried a former rift created by the subducted Farallon slab beneath subsidence in the basins slowed in the Early shoulder in southwestern New Mexico dur- western North America likely contributed to Cretaceous, then increased again from mid- ing late Albian to earliest Cenomanian time long-wavelength subsidence in the central and Albian through middle Cenomanian time, (ca. 105–100 Ma), prior to widespread trans- eastern parts of the basin (e.g., Cross, 1986; marking an episode of foreland subsidence. gression in central New Mexico (ca. 98 Ma). Pang and Nummedal, 1995; Nummedal, 2004). Sandstone composition and detrital zir- Lateral stratigraphic continuity across the In comparison, development of a retroarc fore- con provenance indicate different sediment former rift shoulder likely resulted from re- land basin in the U.S.–Mexico border region, as sources in the three basins and demonstrate gional dynamic subsidence following late Al- inferred from subsidence analysis of the Lower their continued persistence as depocenters bian collision of the Guerrero composite vol- Cretaceous section in southwestern New Mexico during Albian foreland basin development. canic terrane with Mexico and emplacement (Mack, 1987a), did not begin until late Albian Late Jurassic basins received sediment of the Farallon slab beneath the U.S.–Mexico time, or at least 20 m.y. later than farther north. from a nearby magmatic arc that migrated border region. Inferred dynamic subsidence Studies of foreland basin depositional history westward with time. Following a 10–15 m.y. in the foreland of southern Arizona and south- and tectonics have tended to focus on latitudes depositional hiatus, an Early Cretaceous con- western New Mexico was likely augmented in north of Las Vegas, Nevada, as demonstrated tinental margin arc supplied sediment to the Sonora by flexural subsidence adjacent to an by extensive reviews of basin history adjacent Altar-Cucurpe basin in Sonora as early as incipient thrust load driven by collision of the to the Sevier orogenic belt (Lawton, 1994; ca. 136 Ma, but local sedimentary and base- Guerrero superterrane. DeCelles, 2004; Yonkee and Weil, 2015). In ment sources dominated the Huachuca basin contrast, mechanisms of Late Jurassic to mid- of southern Arizona until catchment exten- INTRODUCTION dle Cretaceous sedimentary basin development sion tapped the arc source at ca. 123 Ma. The in the U.S.–Mexico border region of Arizona, Bootheel basin of southwestern New Mexico A fundamental plate tectonic reorganization Sonora, and southwestern New Mexico, and received sediment only from local basement took place during middle Cretaceous (Albian– their relationship with the Cordilleran foreland and recycled sedimentary sources with no Cenomanian) time in the southwest U.S.– basin, remain poorly understood because of less contemporary arc source evident. During Mexico border region immediately following extensive study and uncertainty regarding age Jurassic–Early Cretaceous continental rifting and depositional setting of the Upper Jurassic– (Bilodeau, 1982; Lawton and McMillan, 1999; Cretaceous section. Basin geometry and strati- †[email protected]. Dickinson and Lawton, 2001b). Prior to the graphic architecture are extensively concealed GSA Bulletin; November/December 2020; v. 132; no. 11/12; p. 2489–2516; https://doi.org/10.1130/B35433.1; 13 figures; 5 tables; Data Repository item 2020158. published online 8 April 2020 © 2020 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license. 2489 Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/132/11-12/2489/5206817/2489.pdf by guest on 25 September 2021 Lawton et al. by younger sedimentary and volcanic rocks son et al., 1986; Lawton and McMillan, 1999; potentially rendering inception of foreland his- and overprinted by subsequent deformation Lawton, 2000, 2004; Dickinson and Lawton, tory difficult to recognize. and magmatism (e.g., Soreghan, 1998; McKee 2001b). Basin geometry, forebulge develop- The Bisbee basin, an important archive of the et al., 2005; Amato et al., 2009; Mauel et al., ment, and the migration history of foreland sedimentary history of the U.S.–Mexico bor- 2011; González-León et al., 2011; Clinkscales basins formed on recently rifted lithosphere der region, initially formed as part of the Late and Lawton, 2018). In addition, the middle Cre- differ significantly from equivalent character- Jurassic Mexican Border rift system (Fig. 1; taceous foreland basin formed on continental istics of basins developed upon old lithosphere MBR, originally termed Mexican Borderland crust only newly extended during Jurassic– that behaves like an unbroken elastic plate (Fil- rift; Lawton and McMillan, 1999). The MBR Cretaceous rifting (Bilodeau, 1982; Dickin- dani and Hessler, 2005; Fosdick et al., 2014), extended from the McCoy basin of southern Explanation USA North 40° N 85-100 Ma plutons 100-148 Ma plutons Map area Mexican Undifferentiated Sierra Nevada border rift 30° N batholith NE of San Andreas fault Gulf of Baja magnetic anomaly Mexico Figure 1. Location map of 20° N Mexico Intra-rift uplift Basement age localities discussed in text. province boundary 110° W 100° W 90° W 80° W Communities: A—Albuquer- que; Ba—Batopilas; En— Nevada Ensenada; EP—El Paso; Central Nevada 115° W 110° W 105° W LA—Los Angeles; LV—Las thrust belt n Vegas; P—Phoenix; SC—Sil- ver City; T—Tucson. Geologic Utah Colorado localities of study: Ar—Arizpe; WPt Sevier orogenic belt Arizona New Mexico CC—Clyde Canyon (Burro SJb Mountains); CM—Chirica- LV hua Mountains; CR—Cookes Range; Cu—Cucurpe; Ha— SY CordilleranColorado foreland basi Plateau Ha Hagan basin; HM—Huachuca Mountains; LHM—Little California Mogollon 35° N SAf A Hatchet Mountains; PM—Pel- Mojave LA Yavapai oncillo Mountains; SA—south- C.P. C.P. Mazatzal C.P. ern San Andres Mountains; McC Highlands Fig. 11 SR—Saddlerock Canyon (Burro Mountains); SY—San SR Fence diagram P Ysidro; Tu—Tuape. Geologic CC SC SA abbreviations: ABf—Agua rift flank PM CR Blanca fault; Cah—Cana- EP Bisbee T CM nea high; Cht—Chihuahua En BootheLHM Bisbee trough; C.P.—Proterozoic ABf HM el Huachuca crustal province; McC—Mc- Gulf of California Altar Coy basin; Saf—San Andreas -CucurpeCah fault; SJb—San Juan basin; Caborca block Basin Grenville C.P. Cu WPt—Wheeler Pass thrust. Ar Pacific Tu 30° N Altar-Cucurpe, Bootheel, and Ocean rift flank(?) Huachuca labels indicate sub- Cht basins of Bisbee basin. Plutonic Sonora belts are igneous roots of mag- Baja California Inner flank of matic arcs discussed in text (adapted from Jacobson et al., Peninsula Guerrero composite Chihuahua 2011; Hildebrand and Whalen, terrane 2014). Colorado Plateau for Ba Mexico geographic
Recommended publications
  • Handbook of Texas Cretaceous Fossils
    University of Texas Bulletin No. 2838: October 8, 1928 HANDBOOK OF TEXAS CRETACEOUS FOSSILS B y W. S. ADKINS Bureau of Economic Geology J. A. Udden, Director E. H. Sellards, Associate Director PUBLISHED BY THE UNIVERSITY FOUR TIMES A MONTH, AND ENTERED AS SECOND-CLASS MATTER AT THE POSTOFFICE AT AUSTIN, TEXAS. UNDER THE ACT OF AUGUST 24. 1912 The benefits of education and of useful knowledge, generally diffused through a community, are essential to the preservation of a free govern­ m en t. Sam Houston Cultivated mind is the guardian genius of democracy. It is the only dictator that freemen acknowl­ edge and the only security that free­ men desire. Mirabeau В. Lamar CONTENTS P age Introduction __________________________________________________ 5 Summary of Formation Nomenclature_______________________ 6 Zone Markers and Correlation_______________________________ 8 Types of Texas Cretaceous Fossils___________________________ 36 Bibliography ________________________________________________ 39 L ist and Description of Species_________________________________ 46 P lants ______________________________________________________ 46 Thallophytes ______________________________________________ 46 Fungi __________________________________________________ 46 Algae __________________________________________________ 47 Pteridophytes ____________________________________________ 47 Filices __________________________________________________ 47 Spermatophytes __________________________________________ 47 Gymnospermae _________________________________________
    [Show full text]
  • Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas
    Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253 Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas By WILLIAM A. COBBAN and E. A. MEREWETHER Molluscan Fossil Record from the Northeastern Part of the Upper Cretaceous Seaway, Western Interior By WILLIAM A. COBBAN Lower Upper Cretaceous Strata in Minnesota and Adjacent Areas-Time-Stratigraphic Correlations. and Structural Attitudes By E. A. M EREWETHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1 2 53 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916 Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. (Geological Survey Professional Paper 1253) Bibliography: 52 p. Supt. of Docs. no.: I 19.16 A. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior by William A. Cobban. B. Lower Upper Cretaceous strata in Minnesota and adjacent areas-time-stratigraphic correlations and structural attitudes by E. A. Merewether. I. Mollusks, Fossil-Middle West. 2. Geology, Stratigraphic-Cretaceous. 3. Geology-Middle West. 4. Paleontology-Cretaceous. 5. Paleontology-Middle West. I. Merewether, E. A. (Edward Allen), 1930. II. Title. III. Series. QE687.C6 551.7'7'09776 81--607803 AACR2 For sale by the Distribution Branch, U.S.
    [Show full text]
  • Precise Age and Biostratigraphic Significance of the Kinney Brick Quarry Lagerstätte, Pennsylvanian of New Mexico, USA
    Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstätte, Pennsylvanian of New Mexico, USA Spencer G. Lucas1, Bruce D. Allen2, Karl Krainer3, James Barrick4, Daniel Vachard5, Joerg W. Schneider6, William A. DiMichele7 and Arden R. Bashforth8 1New Mexico Museum of Natural History, 1801 Mountain Road N.W., Albuquerque, New Mexico, 87104, USA email: [email protected] 2New Mexico Bureau of Geology and Mineral Resources, 801 Leroy Place, Socorro, New Mexico, 87801, USA email: [email protected] 3Institute of Geology and Paleontology, University of Innsbruck, Innsbruck, A-6020, Austria email: [email protected] 4Department of Geosciences, Texas Tech University, Box 41053, Lubbock, Texas, 79409, USA email: [email protected] 5Université des Sciences et Technologies de Lille, UFR des Sciences de la Terre, UPRESA 8014 du CNRS, Laboratoire LP3, Bâtiment SN 5, F-59655 Villeneuve d’Ascq, Cédex, France email: [email protected] 6TU Bergakademie Freiberg, Cottastasse 2, D-09596 Freiberg, Germany email:[email protected] 7Department of Paleobiology, NMNH Smithsonian Institution, Washington, DC 20560 email: [email protected] 8Geological Museum, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen K, Denmark email: [email protected] ABSTRACT: The Kinney Brick Quarry is a world famous Late Pennsylvanian fossil Lagerstätte in central New Mexico, USA. The age assigned to the Kinney Brick Quarry (early-middle Virgilian) has long been based more on its inferred lithostratigraphic position than on biostratigraphic indicators at the quarry. We have developed three datasets —-stratigraphic position, fusulinids and conodonts— that in- dicate the Kinney Brick Quarry is older, of middle Missourian (Kasimovian) age.
    [Show full text]
  • Hydrogeology and Stratigraphy of the Dakota Formation in Northwest Iowa
    WATER SUPPLY HYDROGEOLOGY AND J.A. MUNTER BULLETIN G.A. LUDVIGSON NUMBER 13 STRATIGRAPHY OF THE B.J. BUNKER 1983 DAKOTA FORMATION IN NORTHWEST IOWA Iowa Geological Survey Donald L. Koch State Geologist and Director 123 North Capitol Street Iowa City, Iowa 52242 IOWA GEOLOGICAL SURVEY WATER-SUPPLY BULLETIN NO. 13 1983 HYDROGEOLOGY AND STRATIGRAPHY OF THE DAKOTA FORMATION IN NORTHWEST IOWA J. A. Munter G. A. Ludvigson B. J. Bunker Iowa Geological Survey Iowa Geological Survey Donald L. Koch Director and State Geologist 123 North Capitol Street Iowa City, Iowa 52242 Foreword An assessment of the quantity and quality of water available from the Dakota (Sandstone) Formation 1n northwest Iowa is presented in this report. The as sessment was undertaken to provide quantitative information on the hydrology of the Dakota aquifer system to the Iowa Natural Resources Council for alloca tion of water for irrigation, largely as a consequence of the 1976-77 drought. Most area wells for domestic, livestock, and irrigation purposes only partial ly penetrated the Dakota Formation. Consequently, the long-term effects of significant increases in water withdrawals could not be assessed on the basis of existing wells. Acquisition of new data was based upon a drilling program designed to penetrate the entire sequence of Dakota sediments at key loca tions, after a thorough inventory and analysis of existing data. Definition of the distribution, thickness, and lateral and vertical changes in composition of the Dakota Formation has permitted the recognition of two mem bers. Additionally, Identification of the rock units that underlie the Dakota Formation has contributed greatly to our knowledge of the regional geology of northwest Iowa and the upper midwest.
    [Show full text]
  • The Depositional Environment and Petrographic Analysis of the Lower Cretaceous Morita Formation, Bisbee Group, Southeastern Arizona and Northern Sonora, Mexico
    The depositional environment and petrographic analysis of the Lower Cretaceous Morita Formation, Bisbee Group, southeastern Arizona and northern Sonora, Mexico Item Type text; Thesis-Reproduction (electronic); maps Authors Jamison, Kermit 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 12:34:21 Link to Item http://hdl.handle.net/10150/557979 THE DEPOSITIONAL ENVIRONMENT AND PETROGRAPHIC ANALYSIS OF THE LOWER CRETACEOUS MORITA FORMATION, BISBEE GROUP, SOUTHEASTERN ARIZONA AND NORTHERN SONORA, MEXICO by HERMIT JAMISON A Thesis Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE WITH A MAJOR IN GEOLOGY In the Graudate College THE UNIVERSITY OF ARIZONA 1 9 8 3 Call N o . BINDING INSTRUCTIONS INTERLIBRARY INSTRUCTIONS Dept. i *9 7 9 1 Author: J ttm ilO Il, K e 1983 548 Title: RUSH____________________ PERMABIND- PAMPHLET GIFT________________ _____ COLOR: M .S . POCKET FOR MAP COVERS Front Both Special Instructions - Bindery or Repair PFFFPFKirF 3 /2 2 /8 5 Other-----------------------------— . r- STATEMENT BY AUTHOR This thesis has been submitted in partial fulfill­ ment 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 acknow­ ledgement of source is made.
    [Show full text]
  • Upper Paleozoic and Cretaceous Stratigraphy of the Hidalgo County Area, New Mexico Eugene Greenwood, F
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/21 Upper Paleozoic and Cretaceous stratigraphy of the Hidalgo County area, New Mexico Eugene Greenwood, F. E. Kottlowski, and A. K. Armstrong, 1970, pp. 33-44 in: Tyrone, Big Hatchet Mountain, Florida Mountains Region, Woodward, L. A.; [ed.], New Mexico Geological Society 21st Annual Fall Field Conference Guidebook, 176 p. This is one of many related papers that were included in the 1970 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores 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 geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members 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 our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]
  • By Douglas P. Klein with Plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado
    U.S DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein with plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado Open-file Report 95-506 1995 This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey editorial standards. The use of trade, product, or firm names in this papers is for descriptive purposes only, and does not imply endorsement by the U.S. Government. STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein CONTENTS INTRODUCTION .................................................. 1 DEEP SEISMIC CRUSTAL STUDIES .................................. 4 SEISMIC REFRACTION DATA ....................................... 7 RELIABILITY OF VELOCITY STRUCTURE ............................. 9 CHARACTER OF THE SEISMIC VELOCITY SECTION ..................... 13 DRILL HOLE DATA ............................................... 16 BASIN DEPOSITS AND BEDROCK STRUCTURE .......................... 20 Line 1 - Playas Valley ................................... 21 Cowboy Rim caldera .................................. 23 Valley floor ........................................ 24 Line 2 - San Luis Valley through the Alamo Hueco Mountains ....................................... 25 San Luis Valley ..................................... 26 San Luis and Whitewater Mountains ................... 26 Southern
    [Show full text]
  • Bulletin of the Geological Society of America Vol. 71. Pp. 1729-1754, 7 Figs. December 1960 Bermuda: a Partially Drowned, Late M
    BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 71. PP. 1729-1754, 7 FIGS. DECEMBER 1960 BERMUDA: A PARTIALLY DROWNED, LATE MATURE, PLEISTOCENE KARST BY J HARLEN BRETZ ABSTRACT During Pleistocene time, the Bermuda Islands repeatedly underwent partial inundation and re-emergence. The land areas were continuously attacked and reduced by rain and ground water but repeatedly renewed, during times of submergence, by deposition of marine limestone and by contemporaneous additions of shore-born and wind-transported carbonate sand, now eolianite. Soils formed under subaerial conditions are now buried be- neath later deposits and constitute important stratigraphic markers. The igneous founda- tion rock appears to have been exposed during some low marine stands, and the former shore lines seem to be recorded by submerged terraces. The major karst features are largely below sea level, and they must date from times of continental glaciations. Previous writers have assigned eolian accumulation to times of Pleistocene low sea level and soil-making to times of interglacial high sea. Both conclusions are held to be er- roneous. CONTENTS TEXT Figure Page Page Navy and Air Force modifications of the Introduction 1729 shore line 1730 Acknowledgments 1732 2. Bermuda Islands with the adjacent Dunes and eolianites 1732 banks 1733 Paleosols 1736 3. Diagram of section at Whalebone Bay, Ber- Caves 1741 muda Islands 1735 Origin of the interior basins 1744 4. Diagram to show contrast in soil record on Correlation of soil-making and dune-building uplands and lowlands, Bermuda with Pleistocene eustatism 1746 Islands 1736 Conclusion 1752 5. Diagram of Shore Hills type section, References cited 1754 Bermuda Islands 1737 6.
    [Show full text]
  • The Lower Permian Abo Formation in the Fra Cristobal and Caballo Mountains, Sierra County, New Mexico Spencer G
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/63 The Lower Permian Abo Formation in the Fra Cristobal and Caballo Mountains, Sierra County, New Mexico Spencer G. Lucas, Karl Krainer, Dan S. Chaney, William A. DiMichele, Sebastian Voigt, David S. Berman, and Amy C. Henrici, 2012, pp. 345-376 in: Geology of the Warm Springs Region, Lucas, Spencer G.; McLemore, Virginia T.; Lueth, Virgil W.; Spielmann, Justin A.; Krainer, Karl, New Mexico Geological Society 63rd Annual Fall Field Conference Guidebook, 580 p. This is one of many related papers that were included in the 2012 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores 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 geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members 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 our operating budget. Therefore, only research papers are available for download.
    [Show full text]
  • Geologic Controls on Ground-Water Flow in the Mimbres Basin, Southwestern New Mexico Finch, Steven T., Jr
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/59 Geologic controls on ground-water flow in the Mimbres Basin, southwestern New Mexico Finch, Steven T., Jr. McCoy, Annie and Erwin Melis, 2008, pp. 189-198 in: Geology of the Gila Wilderness-Silver City area, Mack, Greg, Witcher, James, Lueth, Virgil W.; [eds.], New Mexico Geological Society 59th Annual Fall Field Conference Guidebook, 210 p. This is one of many related papers that were included in the 2008 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores 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 geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members 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 our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks.
    [Show full text]
  • 12. Lower Cretaceous Ammonites from the South Atlantic Leg 40 (Dsdp), Their Stratigraphic Value and Sedimentologic Properties
    12. LOWER CRETACEOUS AMMONITES FROM THE SOUTH ATLANTIC LEG 40 (DSDP), THEIR STRATIGRAPHIC VALUE AND SEDIMENTOLOGIC PROPERTIES Jost Wiedmann and Joachim Neugebauer, Geol.-palaont. Institut der Universitat Tubingen, BRD ABSTRACT Eleven ammonites have been cored during Leg 40. They were found concentrated in the lower parts of the drilled section at Sites 363 (Walvis Ridge) and 364 (Angola Basin), and permit recognition of upper Albian, middle Albian, and upper Aptian. So far, no lower Albian could be recognized. A high ammonite density can be assumed for the South Atlantic Mid-Cretaceous. In contrast to data available so far, the Walvis Ridge associations consisting of phylloceratids and desmoceratids show more open- basin relationships than those of the Angola Basin, which are composed of mortoniceratids, desmoceratids, and heteromorphs. Paleobiogeographically, the South Atlantic fauna can be related to the well-known onshore faunas of Angola, South Africa, and Madagascar as well as to the European Mid-Cretaceous. This means that the opening of the South Atlantic and its connection with the North Atlantic occurred earlier as was generally presumed, i.e., in the middle Albian. Records of lower Aptian ammonite faunas from Gabon and Brazil remain doubtful. High rates of sedimentation prevailed especially in the Aptian and Albian, in connection with the early deepening of the South Atlantic basins. The mode of preservation of the ammonites suggests that they were deposited on the outer shelf or on the upper continental slope and were predominantly buried under sediments of slightly reducing conditions. In spite of a certain variability of the depositional environment, the ammonites show a uniform and particular mode of preservation.
    [Show full text]
  • Locational Factors Determining the Distribution of Nesting Sites for A
    Edith Cowan University Research Online Theses : Honours Theses 1998 Locational factors determining the distribution of nesting sites for a colony of wedge-tailed shearwaters, puffinus pacificus, onest W Wallabi Island, Houtman Abrolhos, Western Australia Julie Davis Edith Cowan University Follow this and additional works at: https://ro.ecu.edu.au/theses_hons Part of the Ecology and Evolutionary Biology Commons, and the Ornithology Commons Recommended Citation Davis, J. (1998). Locational factors determining the distribution of nesting sites for a colony of wedge- tailed shearwaters, puffinus pacificus, onest W Wallabi Island, Houtman Abrolhos, Western Australia. https://ro.ecu.edu.au/theses_hons/473 This Thesis is posted at Research Online. https://ro.ecu.edu.au/theses_hons/473 Edith Cowan University Copyright Warning You may print or download ONE copy of this document for the purpose of your own research or study. The University does not authorize you to copy, communicate or otherwise make available electronically to any other person any copyright material contained on this site. You are reminded of the following: Copyright owners are entitled to take legal action against persons who infringe their copyright. A reproduction of material that is protected by copyright may be a copyright infringement. Where the reproduction of such material is done without attribution of authorship, with false attribution of authorship or the authorship is treated in a derogatory manner, this may be a breach of the author’s moral rights contained in Part IX of the Copyright Act 1968 (Cth). Courts have the power to impose a wide range of civil and criminal sanctions for infringement of copyright, infringement of moral rights and other offences under the Copyright Act 1968 (Cth).
    [Show full text]