Paleozoic Time Scale and Sea-Level History Sponsored, in Part, By: Time
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High Influx of Carbon in Walls of Agglutinated Foraminifers During the Permian–Triassic Transition in Global Oceans Galina P
This article was downloaded by: [USGS Libraries] On: 18 February 2015, At: 12:06 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK International Geology Review Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tigr20 High influx of carbon in walls of agglutinated foraminifers during the Permian–Triassic transition in global oceans Galina P. Nestella, Merlynd K. Nestella, Brooks B. Ellwoodb, Bruce R. Wardlawc, Asish R. Basua, Nilotpal Ghoshad, Luu Thi Phuong Lane, Harry D. Rowef, Andrew Hunta, Jonathan H. Tomking & Kenneth T. Ratcliffeh a Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, USA b Department of Geology and Geophysics, Louisiana State University, Baton Rouge, USA c Eastern Geology and Palaeoclimate Science Center, United States Geological Survey, Reston, USA Click for updates d Department of Earth and Environmental Sciences, University of Rochester, Rochester, USA e Department of Geomagnetism, Institute of Geophysics, Vietnamese Academy of Science and Technology, Hanoi, Vietnam f Bureau of Economic Geology, University of Texas at Austin, University Station, Austin, USA g School of Earth, Society, and Environment, University of Illinois, Urbana, USA h Chemostrat Inc, Houston, USA Published online: 16 Feb 2015. To cite this article: Galina P. Nestell, Merlynd K. Nestell, Brooks B. Ellwood, Bruce -
Morphology and Developmental Traits of the Trilobite Changaspis Elongata from the Cambrian Series 2 of Guizhou, South China
Morphology and developmental traits of the trilobite Changaspis elongata from the Cambrian Series 2 of Guizhou, South China GUANG-YING DU, JIN PENG, DE-ZHI WANG, QIU-JUN WANG, YI-FAN WANG, and HUI ZHANG Du, G.-Y., Peng, J., Wang, D.-Z., Wang, Q.-J., Wang, Y.-F., and Zhang, H. 2019. Morphology and developmental traits of the trilobite Changaspis elongata from the Cambrian Series 2 of Guizhou, South China. Acta Palaeontologica Polonica 64 (4): 797–813. The morphology and ontogeny of the trilobite Changaspis elongata based on 216 specimens collected from the Lazizhai section of the Balang Formation (Stage 4, Series 2 of the Cambrian) in Guizhou Province, South China are described. The relatively continuous ontogenetic series reveals morphological changes, and shows that the species has seventeen thoracic segments in the holaspid period, instead of the sixteen as previously suggested. The development of the pygid- ial segments shows that their number gradually decreases during ontogeny. A new dataset of well-preserved specimens offers a unique opportunity to investigate developmental traits after segment addition is completed. The ontogenetic size progressions for the lengths of cephalon and trunk show overall compliance with Dyar’s rule. As a result of different average growth rates for the lengths of cephalon, trunk and pygidium, the length of the thorax relative to the body shows a gradually increasing trend; however, the cephalon and pygidium follow the opposite trend. Morphometric analysis across fourteen post-embryonic stages reveals growth gradients with increasing values for each thoracic segment from anterior to posterior. The reconstruction of the development traits shows visualization of the changes in relative growth and segmentation for the different body parts. -
1 Revision 2 1 K-Bentonites
1 Revision 2 2 K-Bentonites: A Review 3 Warren D. Huff 4 Department of Geology, University of Cincinnati, Cincinnati, OH 45221 USA 5 Email: [email protected] 6 Keywords: K-bentonite, bentonite, tephra, explosive volcanism, volcanic ash 7 Abstract 8 Pyroclastic material in the form of altered volcanic ash or tephra has been reported and described 9 from one or more stratigraphic units from the Proterozoic to the Tertiary. This altered tephra, 10 variously called bentonite or K-bentonite or tonstein depending on the degree of alteration and 11 chemical composition, is often linked to large explosive volcanic eruptions that have occurred 12 repeatedly in the past. K-bentonite and bentonite layers are the key components of a larger group of 13 altered tephras that are useful for stratigraphic correlation and for interpreting the geodynamic 14 evolution of our planet. Bentonites generally form by diagenetic or hydrothermal alteration under 15 the influence of fluids with high Mg content and that leach alkali elements. Smectite composition is 16 partly controlled by parent rock chemistry. Studies have shown that K-bentonites often display 17 variations in layer charge and mixed-layer clay ratios and that these correlate with physical 18 properties and diagenetic history. The following is a review of known K-bentonite and related 19 occurrences of altered tephra throughout the time scale from Precambrian to Cenozoic. 20 Introduction 21 Volcanic eruptions are often, although by no means always, associated with a profuse output 22 of fine pyroclastic material, tephra. Tephra is a term used to describe all of the solid material 23 produced from a volcano during an eruption (Thorarinsson, 1944). -
Preliminary Geologic Map of the Baird Mountains and Part of the Selawik Quadrangles, Alaska By
preliminary Geologic Map of the Baird Mountains and part of the Selawik Quadrangles, Alaska by S.M. Karl, J.A. Dumoulin, Inyo Ellersieck, A.G. Harris, and J.M. Schmidt Open-File Report 89-551 This map is preliminary and has not been reviewed for conformity with the North American stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Table Contents ~ntroduction.......................................... 1 Stratigraphic Framework .................................1 Structural Framework ....................................4 Acknowledgments .......................................6 Unit Descriptions ......................................6 Kc ............................................. 6 KJm .............................................6 JPe .............................................7 ~zb................ '. ... ., ,....................... 8 Mzg ............................................10 MzPzi ..........................................10 MZPZ~.......................................... 11 PMC ............................................12 PD1 ............................................12 Mk0 ............................................12 M1 .............................................13 MDue ...........................................14 Mlt ............................................15 Mk .............................................15 MD1 ............................................16 MDe ............................................16 MD~........................................... -
SILURIAN TIMES NEWSLETTER of the INTERNATIONAL SUBCOMMISSION on SILURIAN STRATIGRAPHY (ISSS) (INTERNATIONAL COMMISSION on STRATIGRAPHY, ICS) No
SILURIAN TIMES NEWSLETTER OF THE INTERNATIONAL SUBCOMMISSION ON SILURIAN STRATIGRAPHY (ISSS) (INTERNATIONAL COMMISSION ON STRATIGRAPHY, ICS) No. 27 (for 2019) Edited by ZHAN Renbin INTERNATIONAL UNION OF GEOLOGICAL SCIENCES President: CHENG Qiuming (Canada) Vice-Presidents: Kristine ASCH (Germany) William CAVAZZA (Italy) Secretary General: Stanley C. FINNEY (USA) Treasurer: Hiroshi KITAZATO (Japan) INTERNATIONAL COMMISSION ON STRATIGRAPHY Chairman: David A.T. HARPER (UK) Vice-Chairman: Brian T. HUBER (USA) Secretary General: Philip GIBBARD (UK) SUBCOMMISSION ON SILURIAN STRATIGRAPHY Chairman: Petr ŠTORCH (Czech Republic) Vice-Chairman: Carlo CORRADINI (Italy) Secretary: ZHAN Renbin (China) Other titular members: Anna ANTOSHKINA (Russia) Carlton E. BRETT (USA) Bradley CRAMER (USA) David HOLLOWAY (Australia) Jisuo JIN (Canada) Anna KOZŁOWSKA (Poland) Jiří KŘÍŽ (Czech Republic) David K. LOYDELL (UK) Peep MÄNNIK (Estonia) Michael J. MELCHIN (Canada) Axel MUNNECKE (Germany) Silvio PERALTA (Argentina) Thijs VANDENBROUCKE (Belgium) WANG Yi (China) Živilė ŽIGAITĖ (Lithuania) Silurian Subcommission website: http://silurian.stratigraphy.org 1 CONTENTS CHAIRMAN’S CORNER 3 ANNUAL REPORT OF SILURIAN SUBCOMMISSION FOR 2019 7 INTERNATIONAL COMMISSION ON STRATGRAPHY STATUTES 15 REPORTS OF ACTIVITIES IN 2019 25 1. Report on the ISSS business meeting 2019 25 2. Report on the 15th International Symposium on Early/Lower Vertebrates 28 3. Report on the 13th International Symposium on the Ordovician System in conjunction with the 3rd Annual Meeting of IGCP 653 32 GUIDELINES FOR THE ISSS AWARD: KOREN' AWARD 33 ANNOUNCEMENTS OF MEETINGS and ACTIVITIES 34 1. Lithological Meeting: GEOLOGY OF REEFS 34 SILURIAN RESEARCH 2019: NEWS FROM THE MEMBERS 36 RECENT PUBLICATIONS ON THE SILURIAN RESEARCH 67 MEMBERSHIP NEWS 77 1. List of all Silurian workers and interested colleagues 77 2. -
CALCARI GRIGI, EARL Y JURASSIC, SOUTHERN ALPS) Si Accettano Manoscritti in Italiano, Inglese E Francese
Direttore Responsabile: Prof. FRANCESCO CoNCONI DIPARTIMENTO DI SCIENZE GEOLOGICHE E PALEONTOLOGICH DELL'UNIVERSITÀ DI FERRARA Aut. Trib. Ferrara n. 36/20.5.53 Biblioteca A.P.A.T. Comitato di redazione della Sezione Scienze della Terra: Proff. A. BosELLINI, C. LORIGA BROGLIO, A. ALBERTI, E. SEMENZA. Gli Annali dell'Università di Ferrara, Sezione Scienze della Terra, vengono inviati in cambio di Riviste scientifiche italiane ed estere; tali riviste sono cedute alle Bibliote che del Dipartimento di Scienze Geologiche e Paleontologiche e dell'Istituto di Mi B 79565 neralogia dell'Università di Ferrara. I lavori da pubblicare (in duplice copia + dischetto) ed ogni comunicazione relativa FAUNAL ASSEMBLAGE AND PALAEOENVIRONMENT alla stampa devono essere inviati in duplice copia a: OF SHALLOW WATER BLACK SHALES Redazione degli Annali, Sezione Se. della T erra, Dipartimento di Scienze Geologiche IN THE TONEZZA AREA e Paleontologiche, C.so Ercole I d'Este 32, 44100 Ferrara. (CALCARI GRIGI, EARL Y JURASSIC, SOUTHERN ALPS) Si accettano manoscritti in italiano, inglese e francese. Gli autori ricevono gratuitamente 50 estratti del loro articolo, senza copertina: BASSI D., BOOMER 1., FUGAGNOLI A., Nome dell'Autore o degli Autori, titolo completo e titolo abbreviato su foglio a parte. LORIGA C., POSENATO R. and WHATLEY R.C. Riassunti: in inglese (ampio se il testo è in italiano) e in italiano (ampio se il testo è in inglese o francese). n riassunto deve evidenziare soprattutto i risultati ottenuti dalla ricerca trala sciando il metodo di lavoro, a meno che questo non rappresenti una novità e parte impo'rtante della pubblicazione. Ringraziamenti, riassunti, key words: con questa successione alla fine del testo e INTRODUCTION prima della bibliografia. -
Available Generic Names for Trilobites
AVAILABLE GENERIC NAMES FOR TRILOBITES P.A. JELL AND J.M. ADRAIN Jell, P.A. & Adrain, J.M. 30 8 2002: Available generic names for trilobites. Memoirs of the Queensland Museum 48(2): 331-553. Brisbane. ISSN0079-8835. Aconsolidated list of available generic names introduced since the beginning of the binomial nomenclature system for trilobites is presented for the first time. Each entry is accompanied by the author and date of availability, by the name of the type species, by a lithostratigraphic or biostratigraphic and geographic reference for the type species, by a family assignment and by an age indication of the type species at the Period level (e.g. MCAM, LDEV). A second listing of these names is taxonomically arranged in families with the families listed alphabetically, higher level classification being outside the scope of this work. We also provide a list of names that have apparently been applied to trilobites but which remain nomina nuda within the ICZN definition. Peter A. Jell, Queensland Museum, PO Box 3300, South Brisbane, Queensland 4101, Australia; Jonathan M. Adrain, Department of Geoscience, 121 Trowbridge Hall, Univ- ersity of Iowa, Iowa City, Iowa 52242, USA; 1 August 2002. p Trilobites, generic names, checklist. Trilobite fossils attracted the attention of could find. This list was copied on an early spirit humans in different parts of the world from the stencil machine to some 20 or more trilobite very beginning, probably even prehistoric times. workers around the world, principally those who In the 1700s various European natural historians would author the 1959 Treatise edition. Weller began systematic study of living and fossil also drew on this compilation for his Presidential organisms including trilobites. -
CONODONTS of the MOJCZA LIMESTONE -.: Palaeontologia Polonica
CONODONTS OF THE MOJCZA LIMESTONE JERZY DZIK Dzik, J. 1994. Conodonts of the M6jcza Limestone. -In: J. Dzik, E. Olemp ska, and A. Pisera 1994. Ordovician carbonate platform ecosystem of the Holy Cross Moun tains. Palaeontologia Polonica 53, 43-128. The Ordovician organodetrital limestones and marls studied in outcrops at M6jcza and Miedzygorz, Holy Cross Mts, Poland, contains a record of the evolution of local conodont faunas from the latest Arenig (Early Kundan, Lenodus variabilis Zone) to the Ashgill (Amorphognathus ordovicicus Zone), with a single larger hiatus corre sponding to the subzones from Eop/acognathus pseudop/anu s to E. reclinatu s. The conodont fauna is Baltic in general appearance but cold water genera , like Sagitto dontina, Scabbardella, and Hamarodus, as well as those of Welsh or Chinese af finities, like Comp/exodus, Phragmodus, and Rhodesognathu s are dominant in par ticular parts of the section while others common in the Baltic region, like Periodon , Eop/acognathus, and Sca/pellodus are extremely rare. Most of the lineages continue to occur throughout most of the section enabling quantitative studies on their phyletic evolut ion. Apparatuses of sixty seven species of thirty six genera are described and illustrated. Phyletic evolution of Ba/toniodus, Amorphognathu s, Comp/exodus, and Pygodus is biometrically documented. Element s of apparatu ses are homolog ized and the standard notation system is applied to all of them. Acodontidae fam. n., Drepa nodus kie/censis sp. n., and D. santacrucensis sp. n. are proposed . Ke y w o r d s: conodonts, Ordovici an, evolut ion, taxonomy. Jerzy Dzik, Instytut Paleobiologii PAN, A/eja Zwirk i i Wigury 93, 02-089 Warszawa , Poland. -
Pennsylvanian Boundary Unconformity in Marine Carbonate Successions
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Dissertations & Theses in Earth and Atmospheric Earth and Atmospheric Sciences, Department of Sciences Summer 6-2014 ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. Lucien Nana Yobo University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/geoscidiss Part of the Geochemistry Commons, Geology Commons, Sedimentology Commons, and the Stratigraphy Commons Nana Yobo, Lucien, "ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING." (2014). Dissertations & Theses in Earth and Atmospheric Sciences. 59. http://digitalcommons.unl.edu/geoscidiss/59 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Dissertations & Theses in Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. By Luscalors Lucien Nana Yobo A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science Major: Earth and Atmospheric Sciences Under the Supervision of Professor Tracy D. -
University of Birmingham Carbon Isotope (13Ccarb) and Facies
University of Birmingham Carbon isotope (13Ccarb) and facies variability at the Wenlock-Ludlow boundary (Silurian) of the Midland Platform, UK Blain, John Allan; Wheeley, James; Ray, David DOI: 10.1139/cjes-2015-0194 License: None: All rights reserved Document Version Peer reviewed version Citation for published version (Harvard): Blain, JA, Wheeley, J & Ray, D 2016, 'Carbon isotope (13Ccarb) and facies variability at the Wenlock-Ludlow boundary (Silurian) of the Midland Platform, UK', Canadian Journal of Earth Science. https://doi.org/10.1139/cjes-2015-0194 Link to publication on Research at Birmingham portal Publisher Rights Statement: Publisher Version of Record available at: http://dx.doi.org/10.1139/cjes-2015-0194 Validated Feb 2016 General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. -
Guadalupian, Middle Permian) Mass Extinction in NW Pangea (Borup Fiord, Arctic Canada): a Global Crisis Driven by Volcanism and Anoxia
The Capitanian (Guadalupian, Middle Permian) mass extinction in NW Pangea (Borup Fiord, Arctic Canada): A global crisis driven by volcanism and anoxia David P.G. Bond1†, Paul B. Wignall2, and Stephen E. Grasby3,4 1Department of Geography, Geology and Environment, University of Hull, Hull, HU6 7RX, UK 2School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK 3Geological Survey of Canada, 3303 33rd Street N.W., Calgary, Alberta, T2L 2A7, Canada 4Department of Geoscience, University of Calgary, 2500 University Drive N.W., Calgary Alberta, T2N 1N4, Canada ABSTRACT ing gun of eruptions in the distant Emeishan 2009; Wignall et al., 2009a, 2009b; Bond et al., large igneous province, which drove high- 2010a, 2010b), making this a mid-Capitanian Until recently, the biotic crisis that oc- latitude anoxia via global warming. Although crisis of short duration, fulfilling the second cri- curred within the Capitanian Stage (Middle the global Capitanian extinction might have terion. Several other marine groups were badly Permian, ca. 262 Ma) was known only from had different regional mechanisms, like the affected in equatorial eastern Tethys Ocean, in- equatorial (Tethyan) latitudes, and its global more famous extinction at the end of the cluding corals, bryozoans, and giant alatocon- extent was poorly resolved. The discovery of Permian, each had its roots in large igneous chid bivalves (e.g., Wang and Sugiyama, 2000; a Boreal Capitanian crisis in Spitsbergen, province volcanism. Weidlich, 2002; Bond et al., 2010a; Chen et al., with losses of similar magnitude to those in 2018). In contrast, pelagic elements of the fauna low latitudes, indicated that the event was INTRODUCTION (ammonoids and conodonts) suffered a later, geographically widespread, but further non- ecologically distinct, extinction crisis in the ear- Tethyan records are needed to confirm this as The Capitanian (Guadalupian Series, Middle liest Lopingian (Huang et al., 2019). -
(Foram in Ifers, Algae) and Stratigraphy, Carboniferous
MicropaIeontoIogicaI Zonation (Foramin ifers, Algae) and Stratigraphy, Carboniferous Peratrovich Formation, Southeastern Alaska By BERNARD L. MAMET, SYLVIE PINARD, and AUGUSTUS K. ARMSTRONG U.S. GEOLOGICAL SURVEY BULLETIN 2031 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Robert M. Hirsch, Acting 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 Text and illustrations edited by Mary Lou Callas Line drawings prepared by B.L. Mamet and Stephen Scott Layout and design by Lisa Baserga UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1993 For sale by Book and Open-File Report Sales U.S. Geological Survey Federal Center, Box 25286 Denver, CO 80225 Library of Congress Cataloging in Publication Data Mamet, Bernard L. Micropaleontological zonation (foraminifers, algae) and stratigraphy, Carboniferous Peratrovich Formation, southeastern Alaska / by Bernard L. Mamet, Sylvie Pinard, and Augustus K. Armstrong. p. cm.-(U.S. Geological Survey bulletin ; 2031) Includes bibtiographical references. 1. Geology, Stratigraphic-Carboniferous. 2. Geology-Alaska-Prince of Wales Island. 3. Foraminifera, Fossil-Alaska-Prince of Wales Island. 4. Algae, Fossil-Alaska-Prince of Wales Island. 5. Paleontology- Carboniferous. 6. Paleontology-Alaska-Prince of Wales Island. I. Pinard, Sylvie. II. Armstrong, Augustus K. Ill. Title. IV. Series. QE75.B9 no. 2031 [QE671I 557.3 s--dc20 [551.7'5'097982] 92-32905 CIP CONTENTS Abstract