DOCSLIB.ORG

New Late Cretaceous Leaf Locality from Lower Kirtland Shale Member, Bisti

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
New Late Cretaceous Leaf Locality from Lower Kirtland Shale Member, Bisti NewLate Cretaceous leaf locality from lower Kirtland Shalemember, Bisti area, San Juan Basin, New Mexico byCoteman R. Robison,U.S. Bureau ol LandManagement, Albuquerque,andAdrian Hunf, ResearchAssistant, and Donald L. Wolberg,Paleontologist, New Mexico Bureau of Minesand Mineral Resources This preliminary report represents the first sub- stantial paleobotanic study of new Fruitland or Kirt- plant yrs. land fossils in more than 65 The florule is Rt3W Rl2W Rllw Rlow Rgw the most diverse one ever found in either the Fruir land or Kirtland, and it adds substantially to the list of taxa known from these formations. The Fruitland and Kirtland floras need more paleobotanic study; cooperation from the coal companies in the area will make this possible. More precise stratigraphic delin- eation of floras is needed in differentiatine the two formations. The area in and around Hunter Wash. near the site of the Bisti Trading Post, in west- central San Juan Basin, has been actively in- vestigated by geologists and paleontologists for almost 70 yrs (for example, Bauer, l9l7; Bauer and Reeside, 1921; Gilmore, l9l7; Clemons, 1973; Hutchinson, 1981). Within the immediate region, rocks of the Lewis Shale (Late Cretaceous), Pictured Cliffs Sandstone, Fruitland Formation, and Kirtland Shale are exposed (table l). The Bisti-Fruitland coal field, upon which this area lies, is estimated to contain 1.870 million metric tons of subbitu- minous. low-sulfur coal beneath less than 250 FIGURE 1-Gnorocrcet- MApoF AREArN vrcrNrry oF LEAFLocALITY. Also shown is Fossil Forest, a fossilifer- ft of overburden and is the greatest undevel- ous area currently being studied by the authors and others. Klmv, Lewis Shale; Kpc, Pictured Cliffs Sand- Shale; Kkl, lower shale member of Kirtland Shale; Kkf, oped reserve in the San Juan Basin (Sho- ston€; Kf, Fruitland Formation; Kk, Kirtland Farmington Sandstone Member of Kirtland Shale; TKoa, Ojo.Alamo Sandstone; Tn, Nacimiento Forma- maker, l97l). To better understand the strati- tion; Tsj, San JoseFormation. graphic record and depositional environments of the rocks containing these resources, de- tailed field investigations were made near the two large continentalareas. The San Juan member overlain by the Farmington Sand- old Bisti Trading Post (Fig. l). These involved Basinlay on the westernmargin of the seaway stone Member in turn overlain by the upper stratigraphic sedimentologic and paleontolog- and was intermittently inundated by the ad- shalemember (Bauer, l9l7; Reeside,1924). ical studies (Hunt and others, 1981). During vancesand retreatsof the sea (Fassettand The contact betweenthe lower shale member the course of these investigations a new leaf Hinds,l97l). and the Fruitland Formation is imprecise locality was found in the Fruitland-Kirtland The Pictured Cliffs Sandstonerepresents although many boundaries have been sug- sequence. delta-frontand barrierbeach deposits (Erpen- gested(Fassett and Hinds, 1971,p. l9). Lind- beck, 1979;Cumella, l98l) of the final retreat say and others (1981) suggest,rightly in our TABLE l-Uppen Cnpracrous (CavpaNraN ro of the Campanianseaway from the region. view, the presenceof a transition zone be- MeestntcHtreN)srRATtcRApHtc uNtrs IN AREA oF Coal depositsof varyingthickness and lateral tweenthe uppermostFruitland and lower Kirt- HuNrpnWasn. extent and other organic-rich sedimentswere land Shale. The leaf locality reported here is Iaid down in a variety of delta-plainand back- 8.2 m (27.1ft) abovethe highestcoal contact Stratigraphicunit Thickness barrier environments(Erpenbeck, 1979). The of O'Sullivan and others(1972) and Scott and Ojo Alamo Sandstone 20 rn upper portions of the Fruitland Formation others(1979) and 5.1 m (16.8ft) belowthe top Naashoibito Member 20m and the overlying Kirtland Shale lack well- of a red-browntabular sandstone, the bound- Upper shale member 30m nonmarine developedcoal depositsthat are presentin the ary of Dane (1936) and Hutchison (1981). Kirtland Shale lower Fruitland. Preliminary analyses of Pending more precise delineation of the Farmington Sandstone Fruitland and Kirtland brackish and fresh- boundarythis localityis assignedto the lower Member 120m watermolluscan faunas indicate a progressive shalemember of theKirtland Shale. Lower shale rnember 250m trend toward fresh-waterenvironments. This Locelrrv DEScRrprroN-The locality oc- Fruitland Formation 50m in sec.32, T. 24N., R. l3 Pictured Cliffs Sandstone 25 m final marine trendimplies increasing distance from the Pic- curs theSW%NE% Lewis Shale 20m regressionfrom turedCliffs shoreline(Hartman, l98l). W. (Fig. l) within a measuredsection of 19.37 SanJuan Basin Both the Fruitland and Kirtland shalewere m (63.9 ft) of channelsandstones and over- namedby Max Bauer in 1916for exposures bank depositsconsisting of carbonaceousand along the San Juan River in northwestSan noncarbonaceousmudstones and siltstones Juan County, New Mexico. Lindsay and (appendixA; Fig. 2). The localityis just below Geologic background others(1981) suggested that theKirtland Shale the shoulder of a hill and has been protected The Upper Cretaceousrocks of the Western be renamedthe Kirtland Formation as Kirt- from weathering by an overlying resistant Interior were depositedin or near an epeiric land rocks are predominantly siltstonesand siderite concretion. Although the mudstones seathat extendedfrom the Gull of Mexico to not shales.The Fruitland Formationis domi- are highly weatheredwhere not coveredby the the Arctic Ocean.This seaway,approximately nantly composedof interbeddedcoals, sand- concretion,the deposit seemsto be a lens- 3,000 mi in length and 1,000 mi in width, stones,and shales.Three members of theKirt- shapedpocket that extendslaterally about 3.5 divided the North American landmassinto land Shale are recognized:the lower shale m (l 1.6ft). August1982 New Mexico Geology TABLE 2-CoMpostrroN oF FLoRA. ooo o20 lg Filicophyta (ferns) or9 dq/b Polypodiaceae or8 ogg Asplenium sp. ot7 Woodwardio 2 crenata 50 cm 016 k SANDSTONE Salviniaceae ( 20 inches) 5 gg GRAYGREEN Salvinia sp. Ot ss y YELLOW Coniferophyta (conifers) ol4 lq SHALE,/MUDSTONE or3 q OOO Taxodiaceae K KHAKI Sequoia cuneata COAL/HUMATE c CREAM ot2 99 Anthophyta (fl owering plants) CA CREAMGRAY Monocotyledonae o?9 lg BRECCIA y9 YELLOWGRAY Cyperaceae 028 lg orl l9 gy GREENYELLOW Cyperacties sp. o27 k CARBONACEOUS b BLACK Dicotyledonae SHALE oro lg w WHITE Salicaceae o26 CONCRETION r RED Salix lancensis oo9 l9 S. sp. A o ORANGE oo8 d9/gg s9 br BROWN S. sp. B ooo oo7 s9 SILTSTONE Juglandaceae 99 LEAVES oo6 rg d DARK o05 Caryaantiquorum 9S 9S CLINKER I LIGHT Fagaceae oo4 dg v VERY D ry hy op I lu m subfa I ca t u m 000 coNcRETtoN Moraceae lg oo3 k Ficus baueri? o02 s F. crossii o?l ool F. planicostata FIGURE Platanaceae 2-Dllcnaruvarrc REpRESENTATToNoF MAcRosrRATrcRApHrc sEcrroN rN wHrcH LEAF LocAl-rry LIES. Platanus raynoldsii Menispermaceae Menispermites belli Fruitland and Kirtland floras are inseparable. still to be found in the Fruitland Formation Magnoliaceae The newlocality described below represents by (Tidwell and others, l98l). Three speciesof Magnolia corddolia far the largest sample of a local flora yet figs (Family Moraceae)occur in the florule: Lauraceae described. Ficus vaueri, F. crossii, and F. planicostata. Laurophyllum coloradensis Ficus planicostata (figs.7 and 8) is by far the L. wardiana Floral composition L. salicifolium most frequentlyencountered species in the col- Leguminosae The plant taxa identifiedare listedin table Iection, with specimensranging in size from Leguminosites 2. Only a few ferns occur in Fruitland-Kirt- 1.5x 2.5 cm (.6 x I .0 inches)to 6.2 x 9.3 cm Rhamnaceae land floras(Tidwell and others,l98l), and the (2.5 x 3.7 inches).Menispermites belli (fig. 9) Rhamnus sp. florule discussedhere containsonly three gen- is the only member of the moonseedfamily Zizyphus sp. era: Asplenium, Woodwardia, and Salvinia. (Menispermaceae)in the florule. The laurela Vitaceae Salvinia (plate 1, fig. 1; all further references (Fauraceae)are represented,by Laurophyllum Cissus marginata to plate figures will be made by the notation coloradensis,L. wardiana (fig. Dilleniaceae l0), and L. fig. and the number)is interestingbecause it is (fig. Dillenites cleburni salicifolium l1). Of the family Dilleni- Myrtaceae an aquatic, floating fern that requires open aceae,only Dillenites cleburni (fig. l2) is pre- Myrtophyllum toneyi water. sent.The buckthorn family (Rhamnaceaeltras Taxonomic Position Uncertain The only conifer in the florule is Sequoia one specieseach from the genera(Rhamnus\ Carpites baueri cuneata,which bears short, Iancelike leaves on and Zizyphusin the florule, but the exactspe- C. Iancensis young branchesand scalelikeleaves on older ciesaffinity for the specimensis yet to be de- c. sp. branches.Sequoio cuneata is thoughtto have termined. The remaining dicot families in the Ficus? trineruis been a dominant element of late Cretaceous florule are eachrepresented by a singlespecies Rhamnusminutus peat swampsin the Rocky Mountain region and include: Carya antiquorum unidentifiedinfl uorescence of the Jug- (Parker,1976). This florule is severelyimpov- landaceae (walnut family), Platanus ray- erishedin conifers,which represent only 3.20/o noldsii of the Platanaceae(sycamore family), of the assemblageas opposed to 12.3V0for the Magnolia cordifolia of the Magnoliaceae, Fossil leavesare preservedin light-brown entireFruitland-Kirtland flora (table3). Leguminositessp. of the Leguminosae(pea compressionsthat vary in quality of preserva- The anthophyta(angiosperms
Load more

Recommended publications
  • Download File
    Chronology and Faunal Evolution of the Middle Eocene Bridgerian North American Land Mammal “Age”: Achieving High Precision Geochronology Kaori Tsukui Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Graduate School of Arts and Sciences COLUMBIA UNIVERSITY 2016 © 2015 Kaori Tsukui All rights reserved ABSTRACT Chronology and Faunal Evolution of the Middle Eocene Bridgerian North American Land Mammal “Age”: Achieving High Precision Geochronology Kaori Tsukui The age of the Bridgerian/Uintan boundary has been regarded as one of the most important outstanding problems in North American Land Mammal “Age” (NALMA) biochronology. The Bridger Basin in southwestern Wyoming preserves one of the best stratigraphic records of the faunal boundary as well as the preceding Bridgerian NALMA. In this dissertation, I first developed a chronological framework for the Eocene Bridger Formation including the age of the boundary, based on a combination of magnetostratigraphy and U-Pb ID-TIMS geochronology. Within the temporal framework, I attempted at making a regional correlation of the boundary-bearing strata within the western U.S., and also assessed the body size evolution of three representative taxa from the Bridger Basin within the context of Early Eocene Climatic Optimum. Integrating radioisotopic, magnetostratigraphic and astronomical data from the early to middle Eocene, I reviewed various calibration models for the Geological Time Scale and intercalibration of 40Ar/39Ar data among laboratories and against U-Pb data, toward the community goal of achieving a high precision and well integrated Geological Time Scale. In Chapter 2, I present a magnetostratigraphy and U-Pb zircon geochronology of the Bridger Formation from the Bridger Basin in southwestern Wyoming.
    [Show full text]
  • Forgotten Crocodile from the Kirtland Formation, San Juan Basin, New
    posed that the narial cavities of Para- Wima1l- saurolophuswere vocal resonating chambers' Goniopholiskirtlandicus Apparently included with this material shippedto Wiman was a partial skull that lromthe Wiman describedas a new speciesof croc- forgottencrocodile odile, Goniopholis kirtlandicus. Wiman publisheda descriptionof G. kirtlandicusin Basin, 1932in the Bulletin of the GeologicalInstitute KirtlandFormation, San Juan of IJppsala. Notice of this specieshas not appearedin any Americanpublication. Klilin NewMexico (1955)presented a descriptionand illustration of the speciesin French, but essentially repeatedWiman (1932). byDonald L. Wolberg, Vertebrate Paleontologist, NewMexico Bureau of lVlinesand Mineral Resources, Socorro, NIM Localityinformation for Crocodilian bone, armor, and teeth are Goni o p holi s kir t landicus common in Late Cretaceous and Early Ter- The skeletalmaterial referred to Gonio- tiary deposits of the San Juan Basin and pholis kirtlandicus includesmost of the right elsewhere.In the Fruitland and Kirtland For- side of a skull, a squamosalfragment, and a mations of the San Juan Basin, Late Creta- portion of dorsal plate. The referral of the ceous crocodiles were important carnivores of dorsalplate probably represents an interpreta- the reconstructed stream and stream-bank tion of the proximity of the material when community (Wolberg, 1980). In the Kirtland found. Figs. I and 2, taken from Wiman Formation, a mesosuchian crocodile, Gonio- (1932),illustrate this material. pholis kirtlandicus, discovered by Charles H. Wiman(1932, p. 181)recorded the follow- Sternbergin the early 1920'sand not described ing locality data, provided by Sternberg: until 1932 by Carl Wiman, has been all but of Crocodile.Kirtland shalesa 100feet ignored since its description and referral. "Skull below the Ojo Alamo Sandstonein the blue Specimensreferred to other crocodilian genera cley.
    [Show full text]
  • 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.
    [Show full text]
  • Geology and Coal Resources of the Upper Cretaceous Fruitland Formation, San Juan Basin, New Mexico and Colorado
    Chapter Q National Coal Resource Geology and Coal Resources of the Assessment Upper Cretaceous Fruitland Formation, San Juan Basin, New Mexico and Colorado Click here to return to Disc 1 By James E. Fassett1 Volume Table of Contents Chapter Q of Geologic Assessment of Coal in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah Edited by M.A. Kirschbaum, L.N.R. Roberts, and L.R.H. Biewick U.S. Geological Survey Professional Paper 1625–B* 1 U.S. Geological Survey, Denver, Colorado 80225 * This report, although in the USGS Professional Paper series, is available only on CD-ROM and is not available separately U.S. Department of the Interior U.S. Geological Survey Contents Abstract........................................................................................................................................................Q1 Introduction ................................................................................................................................................... 2 Purpose and Scope ............................................................................................................................. 2 Location and Extent of Area............................................................................................................... 2 Earlier Investigations .......................................................................................................................... 2 Geography............................................................................................................................................
    [Show full text]
  • 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.
    [Show full text]
  • New Mexico Geological Society Proceedings Volume Uranium In
    New Mexico Geological Society Proceedings Volume Uranium in New Mexico: the Resource and the Legacy 2017 Annual Spring Meeting Macey Center New Mexico Tech Socorro, NM 1 NEW MEXICO GEOLOGICAL SOCIETY 2017 SPRING MEETING Friday, April 7, 2017 Macey Center New Mexico Tech Campus Socorro, New Mexico 87801 TABLE OF CONTENTS Schedule of Events ........................................................………3 Abstracts arranged alphabetically by first author..…………...12 NMGS EXECUTIVE COMMITTEE President: Matthew Heizler Vice President: Susan Lucas Kamat Treasurer: Dan Koning Secretary: Shannon Williams Past President: David Ennis 2017 SPRING MEETING COMMITTEE General Chair: Bonnie Frey Technical Program Chair: Virginia T. McLemore Registration Chair: Connie Apache ON-SITE REGISTRATION Connie Apache WEB SUPPORT Adam Read ORAL SESSION CHAIRS Kelsey McNamara, Stacy Timmons, Bruce Allen, David Ennis, Sara Chudnoff, Gary Axen 2 Registration Lower Lobby: 7:15 AM - 12:00 PM NMGS Business Meeting and Awards Ceremony Auditorium: 8:00 AM - 8:15 AM Welcoming Remarks: Nelia Dunbar, Director of New Mexico Bureau of Geology and Mineral Resources and State Geologist Auditorium: 8:15 AM - 8:25 AM Energy in New Mexico: Watersheds and hydrology: Auditorium: 8:30 AM - 9:50 AM Galena Room: 8:30 AM - 9:50 AM Chair: Kelsey McNamara Chair: Gary Axen THE UPPER MANCOS SHALE IN THE SAN JUAN TURNING TOYS INTO TOOLS: UNMANNED BASIN: THREE OIL AND GAS PLAYS, AIRCRAFTS FOR THE 21ST CENTURY GEOSCIENTIST CONVENTIONAL AND UNCONVENTIONAL — Matthew J. Zimmerer and Jake I. Ross — Ronald F Broadhead 8:30 AM - 8:50 AM 8:30 AM - 8:50 AM RELATIONSHIP BETWEEN TREE CANOPY COVER GEOTHERMAL POTENTIAL OF THE SOUTHERN SAN AND DISCHARGE OF UPPER GALLINAS LUIS BASIN, TAOS COUNTY, NEW MEXICO WATERSHED, NEW MEXICO, 1939 – 2015 — Shari Kelley and Jeff D.
    [Show full text]
  • Sedimentation, Pedogenesis, and Paleoclimate Conditions in the Paleocene San Juan Basin, New Mexico, U.S.A
    University of New Mexico UNM Digital Repository Earth and Planetary Sciences ETDs Electronic Theses and Dissertations 7-1-2016 Sedimentation, pedogenesis, and paleoclimate conditions in the Paleocene San Juan Basin, New Mexico, U.S.A. Kevin Hobbs Follow this and additional works at: https://digitalrepository.unm.edu/eps_etds Recommended Citation Hobbs, Kevin. "Sedimentation, pedogenesis, and paleoclimate conditions in the Paleocene San Juan Basin, New Mexico, U.S.A.." (2016). https://digitalrepository.unm.edu/eps_etds/104 This Dissertation is brought to you for free and open access by the Electronic Theses and Dissertations at UNM Digital Repository. It has been accepted for inclusion in Earth and Planetary Sciences ETDs by an authorized administrator of UNM Digital Repository. For more information, please contact [email protected]. Kevin Michael Hobbs Candidate Earth and Planetary Sciences Department This dissertation is approved, and it is acceptable in quality and form for publication: Approved by the Dissertation Committee: Dr. Peter Fawcett, Chairperson Dr. Leslie McFadden Dr. Gary Weissmann Dr. Thomas Williamson i SEDIMENTATION, PEDOGENESIS, AND PALEOCLIMATE CONDITIONS IN THE PALEOCENE SAN JUAN BASIN, NEW MEXICO, U.S.A. by KEVIN MICHAEL HOBBS B.S., Geology, The University of the South, 2006 M.S., Geological Sciences, The University of Idaho, 2010 DISSERTATION Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Earth and Planetary Sciences The University of New Mexico Albuquerque, New Mexico July 2016 ii ACKNOWLEDMENTS I thank the following persons for professional help in the form of discussions, critique of ideas, or suggestions during the research and writing of this dissertation: From the Earth and Planetary Sciences Department: Viorel Atudorei, Adrian Brearley, Ben Burnett, Jeff Carritt, Laura Crossey, Magdalena Donahue, Maya Elrick, John Geissmann, Nick George, Karl Karlstrom, Bekah Levine, Grant Meyer, Corrinne Myers, Lyman Persico, Jane Selverstone, Zach Sharp, Mike Spilde.
    [Show full text]
  • Download Paper
    1 Early Paleocene Magnetostratigraphy and Revised Biostratigraphy of the 2 Ojo Alamo Sandstone and Lower Nacimiento Formation, San Juan 3 Basin, New Mexico, USA 4 5 Andrew G. Flynn1*, Adam J. Davis1,2, Thomas E. Williamson3, Matthew Heizler4, C. William 6 Fenley IV1, Caitlin E. Leslie1, Ross Secord5, Stephen L. Brusatte6, and Daniel J. Peppe1* 7 1Terrestrial Paleoclimate Research Group, Department of Geosciences, Baylor University, Waco, 8 Texas, 76706, USA; *Corresponding authors: [email protected]; 9 [email protected] 10 2Wood PLC, Novi, Michigan, 48377, USA 11 3New Mexico Museum of Natural History and Science, Albuquerque, New Mexico, 87104, USA 12 4New Mexico Bureau of Geology & Mineral Resources, New Mexico Tech, Socorro, New 13 Mexico, USA, 87801 14 5Department of Earth and Atmospheric Sciences and University of Nebraska State Museum, 15 University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA 16 6School of GeoSciences, University of Edinburgh, Grant Institute, James Hutton Road, 17 Edinburgh EH9 3FE, UK 18 Page 1 of 78 19 ABSTRACT 20 The lower Paleocene Ojo Alamo Sandstone and Nacimiento Formation from the San Juan Basin 21 (SJB) in northwestern New Mexico preserve arguably the best early Paleocene mammalian 22 record in North America and is the type location for the Puercan (Pu) and Torrejonian (To) North 23 American Land Mammal ages (NALMA). However, the lack of precise depositional age 24 constraints for the Ojo Alamo Sandstone and lower Nacimiento Formation has hindered our 25 understanding of the timing and pacing of mammalian community change in the SJB following 26 the Cretaceous-Paleogene mass extinction. Here we produced a high-resolution age model for 27 the Ojo Alamo Sandstone and lower Nacimiento Formation combining magnetostratigraphy and 28 40Ar/39Ar geochronology spanning the first ~3.5 Myr of the Paleocene.
    [Show full text]
  • Summary of the Geology and Resources of Uranium in the San Juan Basin and Adjacent Region
    u~c..~ OFR :J8- 'JtgLJ all''1 I. i \ "' ! .SUHMARY OF THE GEOLOGY .ANp RESOURCES OF ,URANIUM IN THE SAN JUAN BASIN AND ADJACENT 'REGION, NEW MEXICO, ARIZONA, UTAH & COLORADO I , J.L. Ridgley, et. al. 1978 US. 6EOL~ SURVEY ~RD, US'RARY 505 MARQU51"1"5 NW, RM 72e I .1\LB'U·QuERQ~, N.M. 87'102 i I UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY SUMMARY OF THE GEOLOGY AND RESOURCES OF URANIUM IN THE SAN JUAN BASIN AND ADJACENT REGION, NEW MEXICO, A~IZONA, UTAH, AND COLORADO 'V'R.0 t ~.-4~ . GICAL SURVEY p.· ..... P• 0 . .:.;J .. _. ·5 ALBU~U~~QUE, N. By Jennie L. Ridgley, Morris W. Green, Charles T. Pierson, • Warren I. Finch, and Robert D. Lupe Open-file Report 78-964 1978 Contents • Page Abstract Introduction 3 General geologic setting 3 Stratigraphy and depositional environments 4 Rocks of Precambrian age 5 .. Rocks of Cambrian age 5 < 'I Ignacio Quartzite 6 Rocks of Devonian age 6... i Aneth Formation 6 Elbert Formation 7 Ouray Limestone 7 Rocks of Mississippian age 8 Redwall Limestone 8 Leadville Limestone 8 Kelly Limestone 9 Arroyo Penasco Group 10 Log Springs Formation 10 Rocks of Pennsylvanian age 11 Molas Formation 11 ~ermosa Formation 12 .' . Ric9 Formation'· 13 .. •;,. Sandia Fotfuatto~ 13 Madera Limestone 14 Unnamed Pennsylvanian rocks 15 • ii • Rocks of Permian age 15 Bursum Formation 16 Abo Formation 16 Cutler Formation 17. Yeso Formation 18 Glorieta Sandstone 19 San Andres Limestone 19 Rocks of Triassic age 20 Moenkopi(?) Formation 21 Chinle Formation 21 Shinarump Member 21 Monitor Butte Member 22 Petrified Forest
    [Show full text]
  • Theropod Bite Marks on Dinosaur Bones: Indications of a Scavenger, Predator Or Both?; and Their Taphonomic Implications
    Sullivan, R.M. and Lucas, S.G., eds., 2015, Fossil Record 4. New Mexico Museum of Natural History and Science Bulletin 68. 275 THEROPOD BITE MARKS ON DINOSAUR BONES: INDICATIONS OF A SCAVENGER, PREDATOR OR BOTH?; AND THEIR TAPHONOMIC IMPLICATIONS ROBERT F. ROBINSON1, STEVEN E. JASINSKI1,2 and ROBERT M. SULLIVAN3 1Section of Paleontology and Geology, State Museum of Pennsylvania, 300 North St., Harrisburg, PA 17120 -email: [email protected]; 2Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA 19104; 3New Mexico Museum of Natural History and Science, 1801 Mountain Rd. NW, Albuquerque, NM 87104. Abstract— Three nearly complete, isolated vertebrae, and a right humerus of a sub-adult hadrosaurine (Ornithopoda: Hadrosaurinae), all from separate individuals and from the Late Cretaceous (late Campanian) Hunter Wash local fauna (Fruitland Formation [Fossil Forest Member] and Kirtland Formation [Hunter Wash Member]), San Juan Basin, New Mexico, bear distinctive bite marks. These bite marks vary in size and shape, suggesting that different species of theropods, or possibly different ontogenetic individuals of a single species, were feeding on the carcasses pertaining to these individual elements. The isolated vertebrae suggest post-mortem bites, probably from scavenging behavior, whereas the bite marks on the humerus may have been inflicted during predation. Based on the bite mark traces, it appears that all bite marks were made by tyrannosauroids of different ontogenetic stages and/or different species. INTRODUCTION in several places and has been fully restored. The main shaft of the humerus is well preserved, while the distal and proximal ends are Fossil vertebrates have been known from the Upper Cretaceous slightly eroded.
    [Show full text]
  • Synoptic Taxonomy of Major Fossil Groups
    APPENDIX Synoptic Taxonomy of Major Fossil Groups Important fossil taxa are listed down to the lowest practical taxonomic level; in most cases, this will be the ordinal or subordinallevel. Abbreviated stratigraphic units in parentheses (e.g., UCamb-Ree) indicate maximum range known for the group; units followed by question marks are isolated occurrences followed generally by an interval with no known representatives. Taxa with ranges to "Ree" are extant. Data are extracted principally from Harland et al. (1967), Moore et al. (1956 et seq.), Sepkoski (1982), Romer (1966), Colbert (1980), Moy-Thomas and Miles (1971), Taylor (1981), and Brasier (1980). KINGDOM MONERA Class Ciliata (cont.) Order Spirotrichia (Tintinnida) (UOrd-Rec) DIVISION CYANOPHYTA ?Class [mertae sedis Order Chitinozoa (Proterozoic?, LOrd-UDev) Class Cyanophyceae Class Actinopoda Order Chroococcales (Archean-Rec) Subclass Radiolaria Order Nostocales (Archean-Ree) Order Polycystina Order Spongiostromales (Archean-Ree) Suborder Spumellaria (MCamb-Rec) Order Stigonematales (LDev-Rec) Suborder Nasselaria (Dev-Ree) Three minor orders KINGDOM ANIMALIA KINGDOM PROTISTA PHYLUM PORIFERA PHYLUM PROTOZOA Class Hexactinellida Order Amphidiscophora (Miss-Ree) Class Rhizopodea Order Hexactinosida (MTrias-Rec) Order Foraminiferida* Order Lyssacinosida (LCamb-Rec) Suborder Allogromiina (UCamb-Ree) Order Lychniscosida (UTrias-Rec) Suborder Textulariina (LCamb-Ree) Class Demospongia Suborder Fusulinina (Ord-Perm) Order Monaxonida (MCamb-Ree) Suborder Miliolina (Sil-Ree) Order Lithistida
    [Show full text]
  • Cretaceous and Tertiary Rocks of the Eastern San Juan Basin, New Mexico and Colorado J
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/25 Cretaceous and Tertiary rocks of the eastern San Juan Basin, New Mexico and Colorado J. E. Fassett, 1974, pp. 225-230 in: Ghost Ranch, Siemers, C. T.; Woodward, L. A.; Callender, J. F.; [eds.], New Mexico Geological Society 25th Annual Fall Field Conference Guidebook, 404 p. This is one of many related papers that were included in the 1974 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]