DOCSLIB.ORG

Triassic Stratigraphy of Southeastern Idaho and Adjacent Areas

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Triassic Stratigraphy of Southeastern Idaho and Adjacent Areas Triassic Stratigraphy of Southeastern Idaho and Adjacent Areas By BERNHARD KUMMEL A SHORTER CONTRIBUTION TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 254-H Studies in southeastern Idaho, western Wyo11ting, and southwestern Montana, revealing one of the thickest and most complete marine sequences of Lower Triassic faunal zones in the world UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1954 UNITED STATES 'DEPARTMENT OF THE INTERIOR. Douglas McKay, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. - Price $1 (paper cover) CONTENTS Page )lbstract------------------------------------------------------------------------------------------------------ 165 Introduction----------------~--------------------------------------------------------------------------------- 165 I>inwoodyformation___________________________________________________________________________________________ 167 VVestern VVyoming_________________________________________________________________________________________ 168 Southeastern Idaho________________________________________________________________________________________ 169 Southwestern ~ontana_____________________________________________________________________________________ 170 VVoodsideformation____________________________________________________________________________________________ 170 Southeastern Idaho---------------------------------------------------------------~------------------------ 170 VVestern VVyoming ___________ ~--------------------------~------------------------------------------------T- 171 Southwestern ~ontana_____________________________________________________________________________________ 171 Northern Utah __________________________________________________________________________________________ ·__ 171 Thaynesformation---------------------------------------------------------------------~----------------------- 171 Southeastern Idaho________________________________________________________________________________________ 172 Fort Hall Indian Reservation to Grays Range ___________________________ :__________________________________ 172 Eastern Bear Lake to Sublette Ridge____ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 17 3 Bear River Range_____________________________________________________________________________________ 175 VVestern VVyoming ____________________________________________________________ :____________________________ 17g Southwestern ~ontana_____________________________________________________________________________________ 177 Central 'Vasatchand Uinta ~ountains_______________________________________________________________________ 177 Post-Thaynes Triassic------------------------------------------------------------------------------------------ 179 Central VVasatchand Uinta ~ountains_______________________________________________________________________ 179 Southeastern Idaho________________________________________________________________________________________ 180 VVestern VVyoming_________________________________________________________________________________________ 181 Chugwater formation of central VVyoming_ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ __ _ _ _ _ _ _ _ _ _ _ _ _ _ __ __ ___ __ _ _ _ __ __ _ __ __ _ _ _ __ __ _ _ _ _ _ _ __ .181 Age and correlation of formations of Triassic age__________________________________________________________________ 182 Literature cited------------------------------------------------------------------------------------------------ 188 Index-------------------------------------------------------------------------------------------------------- 191 ILLUSTRATIONS [Plates 34-40 in pocket] Pan PLATE 34. Composite correlation diagram of formations of Triassic age in ~ontana, Idaho, VVyoming, and Utah. 35. Correlation of Dinwoody and VVoodside formations between Paris, Idaho, and the VVind River ~ountains, VVyo. 36. Correlation of Dinwoody and Woodside formations between Provo, Utah, and Henry, Idaho. 37. Correlation of formations of Triassic age in southwestern ~ontana. 38. Correlation of the Thaynes and overlying formations of Triassic age between Fort Hall, Idaho, and Swift Creek, Wyo. 39. Correlation of the Thaynes and overlying formations of Triassic age between the Bear River Range, Idaho, and Muddy Creek, Wyo. 40. Correlation of outcrop sections of the Thaynes formation in the central VVasatch and Uinta Mountains, Utah. 'FIGURE 18. Correlation chart of Triassic formations in Montana, Idaho, VVyoming, and Utah___________________________ 166 19. Diagram showing northeastward overlap of Triassic formation on Permian formations in Idaho and VVyoming___ 169 20. Correlation diagram of the units of the Thaynes formation between Fort Hall, Idaho, and ~ublette Ridge, VVyo. 174 , 21. Correlation of formations of Triassic age along the south flank of Uinta Mountains, Utah and Colo__________ 178 m • • A SHORTER CONTRIBUTION TO GENERAL GEOLOGY TRIASSIC STRATIGRAPHY. OF SOUTHEASTERN IDAHO AND ADJACENT AREAS By BERNHARD KuMl\IEL ABSTRACT studies have demonstrated that this area contains one '.rhick marine strata of Early Triassic age occur in eastern of the thickest Lower Triassic marine sections in the Idaho and adjacent areas. The area covered in this report lies world and one of the most complete sequences of Lower along the eastern margin of an ancient miogeosycline. Basin­ Triassic faunal zones. Lower Triassic deposits around ward (west) the strata are thickest and consist of fossiliferous marine rocks with no red beds. Toward the craton (east) the the world are generally thin and incomplete in respect strata thin and intertongue with red sandstones and shales. to the number of faunal zones present. Data on the The Dinwoody and Thaynes formations attain their thickest Idaho section will add much to our knowledge of North marine development in the region of the Fort Hall Indian Res­ American Triassic stratigraphy and paleontology; but, ervation. To the east, north, and south of Fort Hall, the Din­ as is probably more important, they are proving to be woody formation intertongues with the red Woodside and Chug­ water formations; the T:Q.aynes formation tongues out eastward a key in the interpretation and correlation of worldwide into the Ankareh and Chugwater formations. The zone of in­ Lower Triassic faunal zones. tertonguing for the Dinwoody formation follows a line from The Early Triassic seaways that covered much of southwestern Montana along the Idaho-Wyoming boundary and western North America were more widespread than turns sharply westward in northern Utah. East of this line those of Middle or Late Triassic time. The distribution red beds are predominant ; west of the line the red beds are absent or of minor thickness. A similar facies line for the of facies and thickness of Lower Triassic strata in Thaynes formation passes southward from the Idaho-Wyoming western North America follows a pattern similar that boundary through the 'Vasatch Mountains and does not turn of the late Paleozoic. Permian and Triassic strata of westward in northern "'Ctah as for the Dinwoody formation. N evacla, California, Oregon, and Washington are char­ New ammonite faunas of Gyronitan and Flemingitan age are acterized by the presence of volcanic rocks. These areas recorded from the Dinwoody formation. The Prohungarites zone, the youngest Scythian ammonite zone, is recognized in include the eugeosyncline ofKay (1951). Strata of the the upper part of the Thaynes formation. The post-Thaynes same age in eastern Nevada, Arizona, Utah, eastern Triassic rocks of this area are of continental origin and are • Idaho, western Wyoming, and southwestern Montana correlated with the Shinarump conglomerate and Chinle forma­ contain no Yolcanic rocks and belong to the miogeosyn­ tion of the Colorado Plateau. The marine miogeosynclinal helt cline of Kay ( 1951). The line marking the approxi­ was destroyed at the end of Early Triassic time. The eastern mate boundary of the·miogeosyncline and the more sta­ Nevada geanticline (Nolan 1943) probably extended northward into Idaho in the middle and late Triassic. ble platform area of the continent has been named the Wasatch line by Kay ( 1951), and it passes in an approx­ INTRODUCTION imate north-south direction through the area of south­ eastern Idaho and the adjacent regions discussed in this Throughout the world, data on stratigraphy and report. At the Wasatch line the Triassic strata begin paleontology of the upper Permian and Lower Triassic to thin, and the marine rocks with red beds intertongue are surprisingly incomplete when compared to higher eastward onto the platform area or the craton of Kay beds of the Mesozoic. Considering that one of the im­ (1951). portant era boundaries separates these hvo series, in1- Nolan ( 1943) described a late Paleozoic and early portant physical and paleobiological data should be Mesozoic geanticline in eastern Nevada. This geanti­ sought in upper Permian and Lower Triassic rocks. cline began to form in the Permian period and extended Although the presence of thick marine deposits of northward until by Late Triassic time it reached en­ Early Triassic age in southeastern Idaho has long been tirely across Nevada. It was at least .a partial barrier known, it is only recently that field and laboratory between the miogeosyncline and the eugeosyncline dur- 16fi 166 SHORTER CONTRIBUTIONS
Load more

Recommended publications
  • Taphonomy of the Sun River Bonebed, Late Cretaceous
    TAPHONOMY OF THE SUN RIVER BONEBED, LATE CRETACEOUS (CAMPANIAN) TWO MEDICINE FORMATION OF MONTANA by Benjamin Andrew Scherzer A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Earth Sciences MONTANA STATE UNIVERSITY-BOZEMAN Bozeman, Montana April 2008 © COPYRIGHT by Benjamin Andrew Scherzer 2008 All Rights Reserved ii APPROVAL of a thesis submitted by Benjamin Andrew Scherzer This thesis has been read by each member of the thesis committee and has been found to be satisfactory regarding content, English usage, format, citations, bibliographic style, and consistency, and is ready for submission to the Division of Graduate Education. Dr. David J. Varricchio Approved for the Department of Earth Sciences Dr. Stephan G. Custer Approved for the Division of Graduate Education Dr. Carl A. Fox iii STATEMENT OF PERMISSION TO USE In presenting this thesis in partial fulfillment for the requirements for a master’s degree at Montana State University, I agree that the Library shall make it available to borrowers under rules of the Library. If I have indicated my intention to copyright this thesis by including a copyright notice page, copying is allowed only for scholarly purposes, consistent with “fair use” as prescribed in the U.S. Copyright Law. Request for permission for extended quotation from or reproduction of this thesis in whole or in parts may be granted only by the copyright holder. Benjamin Andrew Scherzer April 2008 iv ACKNOWLEDGEMENTS This thesis would not have come to completion without the help of each member of my committee: Dave Varricchio, Jack Horner, and Jim Schmitt.
    [Show full text]
  • Triassic- Jurassic Stratigraphy Of
    Triassic- Jurassic Stratigraphy of the <JF C7 JL / Culpfeper and B arbour sville Basins, VirginiaC7 and Maryland/ ll.S. PAPER Triassic-Jurassic Stratigraphy of the Culpeper and Barboursville Basins, Virginia and Maryland By K.Y. LEE and AJ. FROELICH U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1472 A clarification of the Triassic--Jurassic stratigraphic sequences, sedimentation, and depositional environments UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON: 1989 DEPARTMENT OF THE INTERIOR MANUEL LUJAN, Jr., Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Library of Congress Cataloging in Publication Data Lee, K.Y. Triassic-Jurassic stratigraphy of the Culpeper and Barboursville basins, Virginia and Maryland. (U.S. Geological Survey professional paper ; 1472) Bibliography: p. Supt. of Docs. no. : I 19.16:1472 1. Geology, Stratigraphic Triassic. 2. Geology, Stratigraphic Jurassic. 3. Geology Culpeper Basin (Va. and Md.) 4. Geology Virginia Barboursville Basin. I. Froelich, A.J. (Albert Joseph), 1929- II. Title. III. Series. QE676.L44 1989 551.7'62'09755 87-600318 For sale by the Books and Open-File Reports Section, U.S. Geological Survey, Federal Center, Box 25425, Denver, CO 80225 CONTENTS Page Page Abstract.......................................................................................................... 1 Stratigraphy Continued Introduction... ..........................................................................................
    [Show full text]
  • Final Biological Assessment
    REVISED BIOLOGICAL ASSESSMENT Effects of the Modified Idaho Roadless Rule on Federally Listed Threatened, Endangered, Candidate, and Proposed Species for Terrestrial Wildlife, Aquatics, and Plants September 12, 2008 FINAL BIOLOGICAL ASSESSMENT Effects of the Modified Idaho Roadless Rule on Federally Listed Threatened, Endangered, Candidate, and Proposed Species for Terrestrial Wildlife, Aquatics, and Plants Table of Contents I. INTRODUCTION.......................................................................................................................................... 1 II. DESCRIPTION OF THE FEDERAL ACTION .................................................................................................... 3 Purpose and Need..................................................................................................................................3 Description of the Project Area...............................................................................................................4 Modified Idaho Roadless Rule................................................................................................................6 Wild Land Recreation (WLR)...............................................................................................................6 Primitive (PRIM) and Special Areas of Historic and Tribal Significance (SAHTS)..............................7 Backcountry/ Restoration (Backcountry) (BCR)................................................................................10 General Forest, Rangeland,
    [Show full text]
  • Petroleum Geochemistry of the Lower Cretaceous
    Petroleum Geochemistry of the Lower Cretaceous Mannville and Jurassic Ellis Groups, Southern Alberta, Canada Kim Manzano-Kareah *, Shell International Exploration and Production, Houston, USA [email protected] The variation of oil quality in southern Alberta, Western Canada Sedimentary Basin, Canada is primarily due to differences in oils generated from different source rocks and biodegradation of oils in reservoirs. 280 oil samples were collected and analysed by GC and GC-MS, in order to assess the nature and extent of these petroleum systems. Oils from Lower Cretaceous Mannville and Jurassic Ellis Group reservoirs in southern Alberta, Canada (T1-40; R1-25W5) were generated from at least five different source rocks. The proven/probable source rocks include: the Devonian Duvernay Formation (Family D), the Devonian-Mississippian Exshaw Formation (Family E), a probable Paleozoic source (Family M), a probable Jurassic source (Rierdon/Fernie shales; Family F), and the Cretaceous Ostracod Zone (Family Q). Family D oils are restricted to the northernmost part of the study area (Provost field). Biodegradation and the mixing of degraded with non-degraded oils are the main factors controlling the variation in oil quality within a given family. The much improved understanding of oil families and degree of biodegradation allow for more accurate mapping of likely oil migration pathways. Known reservoir trends, subcrop edges, structure, hydrodynamics, the distribution and quality of known oil pools can all be integrated into mapping migration paths. This allows for more accurate mapping of likely oil and gas migration pathways, which can be used for prospect risking and for the ranking of exploration plays.
    [Show full text]
  • From the Western of the United
    from the Western of the United GEOLOGICAL SURVEY P R® BES&lON AL PAPER 1057 Early Triassic Terebratulid Brachiopods from the Western Interior of the United States By PETER R. HOOVER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1057 Description and illustration offive species of terebratulid brachiopods, and discussion of their distribution and developmental and evolutionary history UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1979 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY H. William Menard, Director Library of Congress Cataloging in Publication Data Hoover, Peter R. Early Triassic Terebratulid Brachiopods from the Western Interior of the United States (Geological Survey Professional Paper 1057) Bibliography: p. 19 Includes index Supt. of Docs. No.: I 19:16:1057 1. Terebratulida, Fossil. 2. Paleontology Triassic. 3. Paleontology The West. I. Title. II. Series: United States Geological Survey Professional Paper 1057 QE797.T29H66 564'.8 77-608314 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-03182-5 CONTENTS Page Page Systematic paleontology Continued Abstract ....................... 1 Family Dielasmatidae Continued Introduction .................... 1 Subfamily Dielasmatinae. Previous work................ 1 Rhaetina Waagen ..... Present study ................ 3 Family Terebratulidae ......... 9 Acknowledgments ............ 3 Subfamily Plectoconchiinae. 9 Fossil localities cited in this report. .... 3 Vex, n. gen. ......... 9 Stratigraphic setting of the brachiopods 4 Family Cryptonellidae ......... 11 Faunal relationships. .............. 6 Subfamily Cryptacanthiinae . 11 Biostratigraphic implications........ 6 Obnixia, n. gen. ...... 11 Systematic paleontology............ 7 Family Zeilleriidae ............ 17 Family Dielasmatidae.......... 7 Periallus, n. gen. ......... 17 Subfamily Zugmayeriinae . 7 References cited. ................. 19 Portneufia, n. gen. .... 7 Index ......................... 21 ILLUSTRATIONS [Plates follow index] PLATE 1.
    [Show full text]
  • Feeding Height Stratification Among the Herbivorous
    Mallon et al. BMC Ecology 2013, 13:14 http://www.biomedcentral.com/1472-6785/13/14 RESEARCH ARTICLE Open Access Feeding height stratification among the herbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada Jordan C Mallon1,5*, David C Evans2, Michael J Ryan3 and Jason S Anderson4 Abstract Background: Herbivore coexistence on the Late Cretaceous island continent of Laramidia has been a topic of great interest, stemming from the paradoxically high diversity and biomass of these animals in relation to the relatively small landmass available to them. Various hypotheses have been advanced to account for these facts, of which niche partitioning is among the most frequently invoked. However, despite its wide acceptance, this hypothesis has not been rigorously tested. This study uses the fossil assemblage from the Dinosaur Park Formation of Alberta as a model to investigate whether niche partitioning facilitated herbivorous dinosaur coexistence on Laramidia. Specifically, the question of feeding height stratification is examined in light of the role it plays in facilitating modern ungulate coexistence. Results: Most herbivorous dinosaur species from the Dinosaur Park Formation were restricted to feeding no higher than approximately 1 m above the ground. There is minimal evidence for feeding height partitioning at this level, with ceratopsids capable of feeding slightly higher than ankylosaurs, but the ecological significance of this is ambiguous. Hadrosaurids were uniquely capable of feeding up to 2 m quadrupedally, or up to 5 m bipedally. There is no evidence for either feeding height stratification within any of these clades, or for change in these ecological relationships through the approximately 1.5 Ma record of the Dinosaur Park Formation.
    [Show full text]
  • The Sauropodomorph Biostratigraphy of the Elliot Formation of Southern Africa: Tracking the Evolution of Sauropodomorpha Across the Triassic–Jurassic Boundary
    Editors' choice The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary BLAIR W. MCPHEE, EMESE M. BORDY, LARA SCISCIO, and JONAH N. CHOINIERE McPhee, B.W., Bordy, E.M., Sciscio, L., and Choiniere, J.N. 2017. The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary. Acta Palaeontologica Polonica 62 (3): 441–465. The latest Triassic is notable for coinciding with the dramatic decline of many previously dominant groups, followed by the rapid radiation of Dinosauria in the Early Jurassic. Among the most common terrestrial vertebrates from this time, sauropodomorph dinosaurs provide an important insight into the changing dynamics of the biota across the Triassic–Jurassic boundary. The Elliot Formation of South Africa and Lesotho preserves the richest assemblage of sauropodomorphs known from this age, and is a key index assemblage for biostratigraphic correlations with other simi- larly-aged global terrestrial deposits. Past assessments of Elliot Formation biostratigraphy were hampered by an overly simplistic biozonation scheme which divided it into a lower “Euskelosaurus” Range Zone and an upper Massospondylus Range Zone. Here we revise the zonation of the Elliot Formation by: (i) synthesizing the last three decades’ worth of fossil discoveries, taxonomic revision, and lithostratigraphic investigation; and (ii) systematically reappraising the strati- graphic provenance of important fossil locations. We then use our revised stratigraphic information in conjunction with phylogenetic character data to assess morphological disparity between Late Triassic and Early Jurassic sauropodomorph taxa. Our results demonstrate that the Early Jurassic upper Elliot Formation is considerably more taxonomically and morphologically diverse than previously thought.
    [Show full text]
  • The Geologic History of Fossil Butte National Monument and Fossil Basin
    The Geologic History of Fossil Butte National Monument and Fossil Basin FOSSIL BUTTE The Geologic History of Fossil Butte National Monument and Fossil Basin NPS Occasional Paper No. 3 THE GEOLOGIC HISTORY OF FOSSIL BUTTE NATIONAL MONUMENT AND FOSSIL BASIN Paul O. McGrew Michael Casilliano Department of Geology, University of Wyoming National Park Service Occasional Paper Number Three 1975 TABLE OF CONTENTS index.htm Last Updated: 01-Mar-2005 http://www.nps.gov/history/history/online_books/fobu/index.htm[6/17/2013 12:42:49 PM] The Geologic History of Fossil Butte National Monument and Fossil Basin (Tables of Contents) FOSSIL BUTTE The Geologic History of Fossil Butte National Monument and Fossil Basin NPS Occasional Paper No. 3 CONTENTS COVER INTRODUCTION LOCATION HISTORICAL BACKGROUND OF RESEARCH STRATIGRAPHY Thaynes Limestone Evanston Formation Wasatch Formation Basal Conglomerate Member Lower Member Main Body Sandstone Tongue Mudstone Tongue Bullpen Member Tunp Member Age of the Wasatch Formation Depositional Environment Green River Formation Fossil Butte Member Angelo Member Age of the Green River Formation Depositional Environment Fowkes Formation Sillem Member Bulldog Hollow Member Gooseberry Member Age of the Fowkes Formation Depositional Environment QUATERNARY THE GEOLOGIC STRUCTURE OF FOSSIL BASIN PALEONTOLOGY Flora Invertebrates http://www.nps.gov/history/history/online_books/fobu/contents.htm[6/17/2013 12:42:58 PM] The Geologic History of Fossil Butte National Monument and Fossil Basin (Tables of Contents) Vertebrates Fish Amphibians Reptiles Birds Mammals PALEOECOLOGY AND TAPHONOMY ACKNOWLEDGMENTS GLOSSARY REFERENCES BIBLIOGRAPHY Library of Congress Cataloging in Publication Data McGrew, Paul Orman, 1909- The geological history of Fossil Butte National Monument and Fossil Basin.
    [Show full text]
  • 71St Annual Meeting Society of Vertebrate Paleontology Paris Las Vegas Las Vegas, Nevada, USA November 2 – 5, 2011 SESSION CONCURRENT SESSION CONCURRENT
    ISSN 1937-2809 online Journal of Supplement to the November 2011 Vertebrate Paleontology Vertebrate Society of Vertebrate Paleontology Society of Vertebrate 71st Annual Meeting Paleontology Society of Vertebrate Las Vegas Paris Nevada, USA Las Vegas, November 2 – 5, 2011 Program and Abstracts Society of Vertebrate Paleontology 71st Annual Meeting Program and Abstracts COMMITTEE MEETING ROOM POSTER SESSION/ CONCURRENT CONCURRENT SESSION EXHIBITS SESSION COMMITTEE MEETING ROOMS AUCTION EVENT REGISTRATION, CONCURRENT MERCHANDISE SESSION LOUNGE, EDUCATION & OUTREACH SPEAKER READY COMMITTEE MEETING POSTER SESSION ROOM ROOM SOCIETY OF VERTEBRATE PALEONTOLOGY ABSTRACTS OF PAPERS SEVENTY-FIRST ANNUAL MEETING PARIS LAS VEGAS HOTEL LAS VEGAS, NV, USA NOVEMBER 2–5, 2011 HOST COMMITTEE Stephen Rowland, Co-Chair; Aubrey Bonde, Co-Chair; Joshua Bonde; David Elliott; Lee Hall; Jerry Harris; Andrew Milner; Eric Roberts EXECUTIVE COMMITTEE Philip Currie, President; Blaire Van Valkenburgh, Past President; Catherine Forster, Vice President; Christopher Bell, Secretary; Ted Vlamis, Treasurer; Julia Clarke, Member at Large; Kristina Curry Rogers, Member at Large; Lars Werdelin, Member at Large SYMPOSIUM CONVENORS Roger B.J. Benson, Richard J. Butler, Nadia B. Fröbisch, Hans C.E. Larsson, Mark A. Loewen, Philip D. Mannion, Jim I. Mead, Eric M. Roberts, Scott D. Sampson, Eric D. Scott, Kathleen Springer PROGRAM COMMITTEE Jonathan Bloch, Co-Chair; Anjali Goswami, Co-Chair; Jason Anderson; Paul Barrett; Brian Beatty; Kerin Claeson; Kristina Curry Rogers; Ted Daeschler; David Evans; David Fox; Nadia B. Fröbisch; Christian Kammerer; Johannes Müller; Emily Rayfield; William Sanders; Bruce Shockey; Mary Silcox; Michelle Stocker; Rebecca Terry November 2011—PROGRAM AND ABSTRACTS 1 Members and Friends of the Society of Vertebrate Paleontology, The Host Committee cordially welcomes you to the 71st Annual Meeting of the Society of Vertebrate Paleontology in Las Vegas.
    [Show full text]
  • Carboniferous Formations and Faunas of Central Montana
    Carboniferous Formations and Faunas of Central Montana GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 Carboniferous Formations and Faunas of Central Montana By W. H. EASTON GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 A study of the stratigraphic and ecologic associa­ tions and significance offossils from the Big Snowy group of Mississippian and Pennsylvanian rocks UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1962 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publication as follows : Eastern, William Heyden, 1916- Carboniferous formations and faunas of central Montana. Washington, U.S. Govt. Print. Off., 1961. iv, 126 p. illus., diagrs., tables. 29 cm. (U.S. Geological Survey. Professional paper 348) Part of illustrative matter folded in pocket. Bibliography: p. 101-108. 1. Paleontology Montana. 2. Paleontology Carboniferous. 3. Geology, Stratigraphic Carboniferous. I. Title. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, B.C. CONTENTS Page Page Abstract-__________________________________________ 1 Faunal analysis Continued Introduction _______________________________________ 1 Faunal relations ______________________________ 22 Purposes of the study_ __________________________ 1 Long-ranging elements...__________________ 22 Organization of present work___ __________________ 3 Elements of Mississippian affinity.._________ 22 Acknowledgments--.-------.- ___________________
    [Show full text]
  • Wolverines in Idaho 2014–2019
    Management Plan for the Conservation of Wolverines in Idaho 2014–2019 Prepared by IDAHO DEPARTMENT OF FISH AND GAME July 2014 2 Idaho Department of Fish & Game Recommended Citation: Idaho Department of Fish and Game. 2014. Management plan for the conservation of wolverines in Idaho. Idaho Department of Fish and Game, Boise, USA. Idaho Department of Fish and Game – Wolverine Planning Team: Becky Abel – Regional Wildlife Diversity Biologist, Southeast Region Bryan Aber – Regional Wildlife Biologist, Upper Snake Region Scott Bergen PhD – Senior Wildlife Research Biologist, Statewide, Pocatello William Bosworth – Regional Wildlife Biologist, Southwest Region Rob Cavallaro – Regional Wildlife Diversity Biologist, Upper Snake Region Rita D Dixon PhD – State Wildlife Action Plan Coordinator, Headquarters Diane Evans Mack – Regional Wildlife Diversity Biologist, McCall Subregion Sonya J Knetter – Wildlife Diversity Program GIS Analyst, Headquarters Zach Lockyer – Regional Wildlife Biologist, Southeast Region Michael Lucid – Regional Wildlife Diversity Biologist, Panhandle Region Joel Sauder PhD – Regional Wildlife Diversity Biologist, Clearwater Region Ben Studer – Web and Digital Communications Lead, Headquarters Leona K Svancara PhD – Spatial Ecology Program Lead, Headquarters Beth Waterbury – Team Leader & Regional Wildlife Diversity Biologist, Salmon Region Craig White PhD – Regional Wildlife Manager, Southwest Region Ross Winton – Regional Wildlife Diversity Biologist, Magic Valley Region Additional copies: Additional copies can be downloaded from the Idaho Department of Fish and Game website at fishandgame.idaho.gov/wolverine-conservation-plan Front Cover Photo: Composite photo: Wolverine photo by AYImages; background photo of the Beaverhead Mountains, Lemhi County, Idaho by Rob Spence, Greater Yellowstone Wolverine Program, Wildlife conservation Society. Back Cover Photo: Release of Wolverine F4, a study animal from the Central Idaho Winter Recreation/Wolverine Project, from a live trap north of McCall, 2011.
    [Show full text]
  • North American Coral Recovery After the End-Triassic Mass Extinction, New York Canyon, Nevada, USA
    North American coral recovery after the end-Triassic mass extinction, New York Canyon, Nevada, USA Montana S. Hodges* and George D. Stanley Jr., University of INTRODUCTION Montana Paleontology Center, 32 Campus Drive, Missoula, Mass extinction events punctuate the evolution of marine envi- Montana 59812, USA ronments, and recovery biotas paved the way for major biotic changes. Understanding the responses of marine organisms in the ABSTRACT post-extinction recovery phase is paramount to gaining insight A Triassic-Jurassic (T/J) mass extinction boundary is well repre- into the dynamics of these changes, many of which brought sented stratigraphically in west-central Nevada, USA, near New sweeping biotic reorganizations. One of the five biggest mass York Canyon, where the Gabbs and Sunrise Formations contain a extinctions was that of the end-Triassic, which was quickly continuous depositional section from the Luning Embayment. followed by phases of recovery in the Early Jurassic. The earliest The well-exposed marine sediments at the T/J section have been Jurassic witnessed the loss of conodonts, severe reductions in extensively studied and reveal a sedimentological and paleonto- ammonoids, and reductions in brachiopods, bivalves, gastropods, logical record of intense environmental change and biotic turn- and foraminifers. Reef ecosystems nearly collapsed with a reduc- over, which has been compared globally. Unlike the former Tethys tion in deposition of CaCO3. Extensive volcanism in the Central region, Early Jurassic scleractinian corals surviving the end- Atlantic Magmatic Province and release of gas hydrates and other Triassic mass extinction are not well-represented in the Americas. greenhouse gases escalated CO2 and led to ocean acidification of Here we illustrate corals of Early Sinemurian age from Nevada the end-Triassic (Hautmann et al., 2008).
    [Show full text]