Gastropods from the Gara El Itima (Eastern Anti-Atlas, Morocco)
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Cambrian Ordovician
Open File Report LXXVI the shale is also variously colored. Glauconite is generally abundant in the formation. The Eau Claire A Summary of the Stratigraphy of the increases in thickness southward in the Southern Peninsula of Michigan where it becomes much more Southern Peninsula of Michigan * dolomitic. by: The Dresbach sandstone is a fine to medium grained E. J. Baltrusaites, C. K. Clark, G. V. Cohee, R. P. Grant sandstone with well rounded and angular quartz grains. W. A. Kelly, K. K. Landes, G. D. Lindberg and R. B. Thin beds of argillaceous dolomite may occur locally in Newcombe of the Michigan Geological Society * the sandstone. It is about 100 feet thick in the Southern Peninsula of Michigan but is absent in Northern Indiana. The Franconia sandstone is a fine to medium grained Cambrian glauconitic and dolomitic sandstone. It is from 10 to 20 Cambrian rocks in the Southern Peninsula of Michigan feet thick where present in the Southern Peninsula. consist of sandstone, dolomite, and some shale. These * See last page rocks, Lake Superior sandstone, which are of Upper Cambrian age overlie pre-Cambrian rocks and are The Trempealeau is predominantly a buff to light brown divided into the Jacobsville sandstone overlain by the dolomite with a minor amount of sandy, glauconitic Munising. The Munising sandstone at the north is dolomite and dolomitic shale in the basal part. Zones of divided southward into the following formations in sandy dolomite are in the Trempealeau in addition to the ascending order: Mount Simon, Eau Claire, Dresbach basal part. A small amount of chert may be found in and Franconia sandstones overlain by the Trampealeau various places in the formation. -
Triassic Gastropods of the Southern Qinling Mountains, China
SMITHSONIAN CONTRIBUTIONS TO PALEOBIOLOGY • NUMBER 92 Triassic Gastropods of the Southern Qinling Mountains, China Jinnan Tong and Douglas H. Erwin Smithsonian Institution Press Washington, D.C. 2001 ABSTRACT Tong, Jinnan, and Douglas H. Erwin. Triassic Gastropods of the Southern Qinling Mountains, China. Smithsonian Contributions to Paleobiology, number 92,47 pages, 11 figures, 6 plates, 5 tables, 2001. Forty-eight species in 27 genera of gastropods, including 14 new species and one new genus, are described from early- to middle-Triassic (Scythian- to Ladinian-aged) rocks from the southern Qinling Mountains of Gansu and Sichuan provinces, China. This report expands the knowledge of the biogeographic distribution of gastropods during the recovery from the end-Permian mass extinction. The new taxa include Tongweispira sichuanensis, new genus and new species, and the following new species: Ananias guojiashanensis, Worthenia extendia, Gosseletinal dangchangensis, Zygites laevigatus, Trochotoma {Discotoma) gansuensis, Cheilotomona acutocarinata, Naticopsis (Dicosmos) compressus, Naticopsis (Dicosmos) sichuanensis, Naticopsis? ribletella, Neritopsis planoplicatus, Platychilina sinen sis, Platychilina obliqua, and Omphaloptycha gansuensis. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution's annual report, Annals of the Smithsonian Institution. SERIES COVER DESIGN: The trilobite Phacops rana Green. Library of Congress Cataloging-in-Publication Data Tong, Jinnan. Triassic gastropods -
Middle Triassic Gastropods from the Besano Formation of Monte San Giorgio, Switzerland Vittorio Pieroni1 and Heinz Furrer2*
Pieroni and Furrer Swiss J Palaeontol (2020) 139:2 https://doi.org/10.1186/s13358-019-00201-8 Swiss Journal of Palaeontology RESEARCH ARTICLE Open Access Middle Triassic gastropods from the Besano Formation of Monte San Giorgio, Switzerland Vittorio Pieroni1 and Heinz Furrer2* Abstract For the frst time gastropods from the Besano Formation (Anisian/Ladinian boundary) are documented. The material was collected from three diferent outcrops at Monte San Giorgio (Southern Alps, Ticino, Switzerland). The taxa here described are Worthenia (Humiliworthenia)? af. microstriata, Frederikella cf. cancellata, ?Trachynerita sp., ?Omphalopty- cha sp. 1 and ?Omphaloptycha sp. 2. They represent the best preserved specimens of a larger collection and docu- ment the presence in this formation of the clades Vetigastropoda, Neritimorpha and Caenogastropoda that were widespread on the Alpine Triassic carbonate platforms. True benthic molluscs are very rarely documented in the Besano Formation, which is interpreted as intra-platform basin sediments deposited in usually anoxic condition. Small and juvenile gastropods could have been lived as pseudoplankton attached to foating algae or as free-swimming veliger planktotrophic larval stages. Accumulations of larval specimens suggest unfavorable living conditions with prevailing disturbance in the planktic realm or mass mortality events. However, larger gastropods more probably were washed in with sediments disturbed by slumping and turbidite currents along the basin edge or storm activity across the platform of the time equivalent Middle San Salvatore Dolomite. Keywords: Gastropods, Middle Triassic, Environment, Besano Formation, Southern Alps, Switzerland Introduction environment characterized by anoxic condition in bottom Te Middle Triassic Besano Formation (formerly called waters of an intraplatform basin (Bernasconi 1991; Schatz “Grenzbitumenzone” in most publications) is exposed 2005a). -
Monograph38.Pdf
The Lower Triassic System in the Abrek Bay area, South Primorye, Russia Edited by Yasunari Shigeta Yuri D. Zakharov Haruyoshi Maeda Alexander M. Popov National Museum of Nature and Science Tokyo, March 2009 v Contents Contributors .................................................................vi Abstract ....................................................................vii Introduction (Y. Shigeta, Y. D. Zakharov, H. Maeda, A. M. Popov, K. Yokoyama and H. Igo) ...1 Paleogeographical and geological setting (Y. Shigeta, H. Maeda, K. Yokoyama and Y. D. Zakharov) ....................3 Stratigraphy (H. Maeda, Y. Shigeta, Y. Tsujino and T. Kumagae) .........................4 Biostratigraphy Ammonoid succession (Y. Shigeta, H. Maeda and Y. D. Zakharov) ..................24 Conodont succession (H. Igo) ...............................................27 Correlation (Y. Shigeta and H. Igo) ...........................................29 Age distribution of detrital monazites in the sandstone (K. Yokoyama, Y. Shigeta and Y. Tsutsumi) ..............................30 Discussion Age data of monazites (K. Yokoyama, Y. Shigeta and Y. Tsutsumi) ..................34 The position of the Abrek Bay section in the “Ussuri Basin” (Y. Shigeta and H. Maeda) ...36 Ammonoid mode of occurrence (H. Maeda and Y. Shigeta) ........................36 Aspects of ammonoid faunas (Y. Shigeta) ......................................38 Holocrinus species from the early Smithian (T. Oji) ..............................39 Recovery of nautiloids in the Early Triassic (Y. Shigeta) -
THE Geologlcal SURVEY of INDIA Melvioirs
MEMOIRS OF THE GEOLOGlCAL SURVEY OF INDIA MElVIOIRS OF THE GEOLOGICAL SURVEY OF INDIA VOLUME XXXVI, PART 3 THE TRIAS OF THE HIMALAYAS. By C. DIENER, PH.0., Professor of Palceontology at the Universz'ty of Vienna Published by order of the Government of India __ ______ _ ____ __ ___ r§'~-CIL04l.~y_, ~ ,.. __ ..::-;:;_·.•,· ' .' ,~P-- - _. - •1~ r_. 1..1-l -. --~ ·~-'. .. ~--- .,,- .'~._. - CALCU'l"l'A: V:/f/ .. -:-~,_'."'' SOLD AT THE Ol<'FICE OF THE GEOLOGICAL SURVEY o'U-1kI>i'A,- 27, CHOWRINGHim ROAD LONDON: MESSRS. KEGAN PAUT,, TRENCH, TRUBNER & CO. BERLIN : MESSRS. FRIEDLANDEH UND SOHN 1912. CONTENTS. am I• PA.GE, 1.-INTBODUCTION l 11.-LJ'rERA.TURE • • 3· III.-GENERAL DE\'ELOPMEKT OF THE Hrn:ALAYA.K TRIAS 111 A. Himalayan Facies 15 1.-The Lower Trias 15 (a) Spiti . Ip (b) Painkhanda . ·20 (c) Eastern Johar 25 (d) Byans . 26 (e) Kashmir 27 (/) Interregional Correlation of fossiliferous horizons 30 (g) Correlation with the Ceratite beds of the Salt Range 33 (Ti) Correlation with the Lower Trias of Europe, Xorth America and Siberia . 36 (i) The Permo-Triassic boundary . 42 II.-The l\Iiddle Trias. (Muschelkalk and Ladinic stage) 55 (a) The Muschelkalk of Spiti and Painkhanda v5 (b) The Muschelkalk of Kashmir . 67 (c) The llluschelka)k of Eastern Johar 68 (d) The l\Iuschelkalk of Byans 68 (e) The Ladinic stage.of Spiti 71 (f) The Ladinic stage of Painkhanda, Johar and Byans 75 (g) Correl;i.tion "ith the Middle Triassic deposits of Europe and America . 77 III.-The Upper Trias (Carnie, Korie, and Rhretic stages) 85 (a) Classification of the Upper Trias in Spiti and Painkhanda 85 (b) The Carnie stage in Spiti and Painkhanda 86 (c) The Korie and Rhretic stages in Spiti and Painkhanda 94 (d) Interregional correlation and homotaxis of the Upper Triassic deposits of Spiti and Painkhanda with those of Europe and America 108 (e) The Upper Trias of Kashmir and the Pamir 114 A.-Kashmir . -
University of Nevada Reno Paleoecology of Upper Triassic
University of Nevada Reno Paleoecology of Upper Triassic Bioherms in the Pilot Mountains, Mineral County, West-Central Nevada A tiles is submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology by Diane Elinor Cornwall May 1979 University of Nevada Reno ACKNOWLEDGEMENTS I would like to thank Dr. James R. Firby for his supervision, support and for his guidance through those difficult "rough spots." Dan Howe was a constant source of interesting ideas and enthusiasm, especially during the early stages of the thesis project. Throughout my research Fred Gustafson and I worked together, he always being an interested and understanding coworker and friend throughout the lonely weeks of research. Dr. Joseph Lintz, Jr. was invaluable in his assistance in procurement of materials and equipment and in his unselfish desire to solve any problem. I thank Dr. Mead for joining my committee. I greatly appreciate those hearty souls who ventured out into the desert with me and braved the hazards and extremes; these include Barbara Foster, Mickie Dunn, Micheal Judge and my parents who spent all their vacations in my field area. I would also like to acknowledge the moral support given by my parents, special and other friends. i n ABSTRAC In the Pilot Mountains, Mineral County, Nevada, up to five horizons of bioherms are present within the top 76 meters of the lower member of the Upper Triassic (Karnian) Luning Formation. These bio herms are located in the carbonate portions of small terrigenous- carbonate rhythms. The biohermal mounds, less than 15 meters high^exhibit four of Wilson's (1975) seven facies. -
Sepkoski, J.J. 1992. Compendium of Fossil Marine Animal Families
MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. Department of the Geophysical Sciences University of Chicago Chicago, Illinois 60637 Milwaukee Public Museum Contributions in Biology and Geology Rodney Watkins, Editor (Reviewer for this paper was P.M. Sheehan) This publication is priced at $25.00 and may be obtained by writing to the Museum Gift Shop, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Orders must also include $3.00 for shipping and handling ($4.00 for foreign destinations) and must be accompanied by money order or check drawn on U.S. bank. Money orders or checks should be made payable to the Milwaukee Public Museum. Wisconsin residents please add 5% sales tax. In addition, a diskette in ASCII format (DOS) containing the data in this publication is priced at $25.00. Diskettes should be ordered from the Geology Section, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Specify 3Y. inch or 5Y. inch diskette size when ordering. Checks or money orders for diskettes should be made payable to "GeologySection, Milwaukee Public Museum," and fees for shipping and handling included as stated above. Profits support the research effort of the GeologySection. ISBN 0-89326-168-8 ©1992Milwaukee Public Museum Sponsored by Milwaukee County Contents Abstract ....... 1 Introduction.. ... 2 Stratigraphic codes. 8 The Compendium 14 Actinopoda. -
Middle Devonian)
F-l Paleontological Problems of the Hamilton Group (Middle Devonian) H.B. Rollins, N. Eldridge, R.M. Linsley The stratigraphy of the Hamilton Group of the'Middle Devonian of New York State was most recently treated in its entirety by Cooper (1930, 1957). The Hamilton Group of the Chenango Valley (see chart 1) consists primarily of fine clastic sediments and occupies a mid position in this wedge shaped body of rock. In the east the wedge is thickest (about 1,680' in Schoharie Valley (Gruban, 1903, p. 213) and it thins to 285' at Lake Erie in the west (Cooper, 1930, p. 121). In the Chenango Valley the Hamilton Group is 1, 465' thick (op. cit. p. 121) and has a dip to the southwest of 65-75 feet per mile (op. cit. p. 119). The Hamilton Group lies unconformably on the Onondaga Limestone and is overlain unconformably by the Tully Formation. In a very crude sense the Hamilton Group of the Chenango Valley is composed of fine-grained black shales and limestones at the base (the Marcellus Formation) and more clastic units in the upper portion (Skaneateles, Ludlowville and Moscow Formations). However within each of these formations there exists considerable variation from true mud shales through siltstones and up to fine-grained sandstones. The nature of the substrate obviously had a great effect on the faunas associated with them. The black shales are typically associated with a Leiorhynchus fauna, gray shales and siltstones with a Tropidoleptus fauna and the fine-grained sandstones are dominated by bivalves. A more detailed discussion of some of these problems will follow in sections relating to each of the three stops of this trip. -
Chapter 5. Paleozoic Invertebrate Paleontology of Grand Canyon National Park
Chapter 5. Paleozoic Invertebrate Paleontology of Grand Canyon National Park By Linda Sue Lassiter1, Justin S. Tweet2, Frederick A. Sundberg3, John R. Foster4, and P. J. Bergman5 1Northern Arizona University Department of Biological Sciences Flagstaff, Arizona 2National Park Service 9149 79th Street S. Cottage Grove, Minnesota 55016 3Museum of Northern Arizona Research Associate Flagstaff, Arizona 4Utah Field House of Natural History State Park Museum Vernal, Utah 5Northern Arizona University Flagstaff, Arizona Introduction As impressive as the Grand Canyon is to any observer from the rim, the river, or even from space, these cliffs and slopes are much more than an array of colors above the serpentine majesty of the Colorado River. The erosive forces of the Colorado River and feeder streams took millions of years to carve more than 290 million years of Paleozoic Era rocks. These exposures of Paleozoic Era sediments constitute 85% of the almost 5,000 km2 (1,903 mi2) of the Grand Canyon National Park (GRCA) and reveal important chronologic information on marine paleoecologies of the past. This expanse of both spatial and temporal coverage is unrivaled anywhere else on our planet. While many visitors stand on the rim and peer down into the abyss of the carved canyon depths, few realize that they are also staring at the history of life from almost 520 million years ago (Ma) where the Paleozoic rocks cover the great unconformity (Karlstrom et al. 2018) to 270 Ma at the top (Sorauf and Billingsley 1991). The Paleozoic rocks visible from the South Rim Visitors Center, are mostly from marine and some fluvial sediment deposits (Figure 5-1). -
Phylum Mollusca – Class Bivalvia
Phylum Mollusca – Class Bivalvia • Class of marine and fresh water invertebrates with hinged shells • Previously referred to as Pelecypoda (pelecypods) • Includes over 9000 living species (clams, oysters, muscles, scallops) • Majority are filter feeders • Most species bury in sediment to protect from predators, most are modestly mobile, a few like scallops can swim • Shell built of calcium carbonate • Earliest bivalves were in the Cambrian Period Clams are the longest living species on the planet. A clam found in Iceland was 507 years old. Many live 200-300 years. Class Bivalvia 30. Genus Exogyra ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ __________________________ Phyllum Mollusca – Class Bivalvia (cont.) 31. Genus Gryphaea ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ 32. Genus Pecten ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ 33. Genus Glycymeris ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ Phylum Mollusca – Class Cephalopoda • Squids, octopuses, cuttlefish • Occupy all water depths and all of the world’s oceans, but with -
Ordovician) ‘Baksteenkalk’: an Erratic Silicified Limestone of Baltic Origin from the Northeastern Netherlands and Adjacent Areas of Germany
Estonian Journal of Earth Sciences, 2017, 66, 4, 198–219 https://doi.org/10.3176/earth.2017.18 Typology and fossil assemblage of Sandbian (Ordovician) ‘baksteenkalk’: an erratic silicified limestone of Baltic origin from the northeastern Netherlands and adjacent areas of Germany Percy van Keulena and Freek Rhebergenb a Kennedylaan 36, NL-3844 BD Harderwijk, the Netherlands; [email protected] b Slenerbrink 178, NL-7812 HJ Emmen, the Netherlands; [email protected] Received 24 May 2017, accepted 6 September 2017, available online 7 November 2017 Abstract. This study seeks to describe ‘baksteenkalk’, an erratic silicified bioclastic carbonate of the Upper Sandbian from the eastern part of the Netherlands. To date, baksteenkalk has received little attention among palaeontologists. This is to be regretted on two grounds. First, baksteenkalk contains a varied fossil flora and fauna comprising many species, several of which are not or only rarely found in coeval rocks. Second, owing to a complicated silicification process, fossils, in particular algae, have preserved exceptional anatomical details. The primary aim of this study is to arouse the interest of professional, in particular, Estonian, palaeontologists in baksteenkalk. Based on lithology and fossil assemblage (most conspicuously, with regard to the algal flora), two basic types of baksteenkalk are distinguished. A list of species, differentiated for both types, is provided. It is argued that baksteenkalk reflects the ecology of a shallow, subtropical, epicontinental sea. The distribution of erratics, facies and fossil content point to an origin within the North Estonian Confacies Belt, probably west of Estonia. Baksteenkalk survived as an erratic because it was already silicified at its place of origin. -
Stratigraphy, Structure and Early Paleozoic Gastropoda of the Callahan Area, Klameth Mountains, California
AN ABSTRACT OF THE THESIS OF David Malcolm Rohr for the degree of Doctor of Philosophy in Geology presented on 15 June 1977 Title:STRATIGRAPHY, STRUCTURE, AND EARLY PALEOZOIC GASTROPODA OF THE CALLAHAN AREA, KLAMATH MOUNTAINS, CALIFORNIA Redacted for Privacy Abstract approved: A. IV Boucot The sedimentary, metamorphic, and igneous rocks of the Callahan, California area formed on, or adjacent to, a Lower Paleo- zoic island arc complex which has since been tectonically disrupted. Sandstone, shale, lithic wacke, chert, banded quartzite, siliceous mudstone, conglomerate, and limestone of the eastern Klamath belt were deposited from the Middle Ordovician through the Early Devonian on top of the peridotite of the Early? Ordovician Trinity ophiolitic complex.Shallow water deposition began in the Middle Ordovician with the Facey Rock Limestone.Sandstone, siltstone, and shale of the Moffett Creek Formation probably formed as turbidity flows adjacent to the arc and were later disrupted, possibly at shallow depths in a subduction zone.Other units in the Callahan area (Calla- han Chert, Gazelle Formation, quartzite of Squaw Gulch, siliceous mudstone of Thompson Gulch) may have formed in basins on the Moffett Creek Formation. The Moffett Creek Formation was derived from a primarily plutonic-metamorphic terrane, possibly a deeply eroded arc complex, while the overlying Gazelle Formation was derived from a primarily calc-alkaline volcanic source. Amphibolite and impure marbles of the Grouse Ridge Formation, which have an Early or Middle Devonian age