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03-Alekseev and Goreva (Neognathodus).P65
Lucas, S.G., et al. eds., 2013, The Carboniferous-Permian Transition. New Mexico Museum of Natural History and Science, Bulletin 60. 1 THE CONODONT NEOGNATHODUS BOTHROPS MERRILL, 1972 AS THE MARKER FOR THE LOWER BOUNDARY OF THE MOSCOVIAN STAGE (MIDDLE PENNSYLVANIAN) ALEXANDER S. ALEKSEEV1 AND NATALIA V. GOREVA 2 1 Department of Paleontology, Geological Faculty, Moscow State University, Russia, email: aaleks@geol. msu.ru; 2 Geological institute of Russian Academy of Science, Moscow, Russia, email: [email protected] Abstract—The Moscovian Stage constitutes the Middle Pennsylvanian Series of the Carboniferous System, but a biostratigraphic marker and GSSP for it have not yet been designated. The exact position of the Moscovian boundary cannot be defined properly because in the type area the basal Vereian unconformably overlies the Mississippian limestone or the alluvial and lagoonal Aza Formation of the uppermost Bashkirian. The Task Group to establish a GSSP close to the existing Bashkirian-Moscovian boundary suggested several potential markers among foraminifers and conodonts, but the search for a marker near traditional base of the global Moscovian Stage has stalled. It may be more productive to search for FADs in the lower Moscovian, above the traditional base, to designate the lower boundary of the stage. Relatively rich Vereian and Kashirian conodont assemblages have been recovered from the southwest Moscow Basin, as well as from the Oka-Tsna Swell. The most complete information on the distribution of conodonts in the Vereian- Kashirian boundary interval was obtained from the Yambirno section (Oka-Tsna Swell). The greatest change in conodont assemblages does not occur near the level of the traditional base of the Moscovian, but stratigraphically higher. -
Conodont Faunas Across the Mid-Carboniferous Boundary From
Conodont faunas across the mid-Carboniferous boundary from the Barcaliente Formation at La Lastra (Palentian Zone, Cantabrian Mountains, northwest Spain); geological setting, sedimentological characters and faunal descriptions T.I. Nemyrovska, R.H. Wagner, C.F. Winkler Prins & I. Montañez Nemyrovska, T.I., Wagner, R.H., Winkler Prins, C.F. & Montañez, I. Conodont faunas across the mid- Carboniferous boundary from the Barcaliente Formation at La Lastra (Palentian Zone, Cantabrian Mountains, northwest Spain); geological setting, sedimentological characters and faunal descriptions. Scripta Geologica, 143: 127-183, 8 figs., 4 pls, 1 table, Leiden, December 2011. Tamara I. Nemyrovska, Institute of Geological Sciences, National Academy of Sciences of Ukraine, Gonchar Str., 55-b, 01054 Kiev, Ukraine ([email protected]); Robert H. Wagner, Centro Paleobotánico, IMGEMA Jardín Botánico de Córdoba, Avenida de Linneo s/n, E 14004 Córdoba, Spain (cr1wagro@uco. es); Cor F. Winkler Prins, NCB Naturalis, Postbus 9517, 2300 RA Leiden, The Netherlands (Cor.Winkler@ ncbnaturalis.nl); Isabel Montañez, Department of Geology, University of California, Davis, CA 95616, U.S.A. (ipmontañ[email protected]). Keywords — Serpukhovian, Bashkirian, biostratigraphy, palaeoecology. Two different tectono-stratigraphic domains are recognised in the Cantabrian Mountains, Asturian-Leo- nese (Cantabrian Zone) and Palentian (Palentian Zone). The area under investigation belongs to the south- ern part of the Palentian Domain and attention is focused on the Upper Viséan to lowermost Bashkirian limestones at the village of La Lastra in northern Palencia. A new geological map of the Palentian Zone is accompanied by a more detailed map centred on La Lastra. The Barcaliente Limestone Formation (Ser- pukhovian to lowermost Bashkirian) occurs in the overturned limb of a recumbent anticline which consti- tutes the head of a south-verging major thrust unit, the Carrionas Thrust Sheet (Palentian Zone). -
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. -
The Earliest Known Kinnella, an Orthide Brachiopod from the Upper Ordovician of Manitoulin Island, Ontario, Canada
The earliest known Kinnella, an orthide brachiopod from the Upper Ordovician of Manitoulin Island, Ontario, Canada CHRISTOPHER A. STOTT and JISUO JIN Stott, C.A. and Jin, J. 2007. The earliest known Kinnella, an orthide brachiopod from the Upper Ordovician of Manitoulin Island, Ontario, Canada. Acta Palaeontologica Polonica 52 (3): 535–546. A new species of the orthide brachiopod genus Kinnella is described from the Upper Member of the Georgian Bay Forma− tion (Upper Ordovician) of Manitoulin Island, Ontario, Canada. This species, herein designated as Kinnella laurentiana sp. nov., occurs in strata of Richmondian (mid−Ashgill; Katian) age, most likely correlative with the eastern North Ameri− can Dicellograptus complanatus Zone. This occurrence extends the known stratigraphic range of Kinnella downward considerably from its previously inferred basal Hirnantian inception. The new species is characterized by a moderately convex dorsal valve and an apsacline ventral interarea rarely approaching catacline. This is the third reported occurrence of Kinnella in North America, and is the only species known to have inhabited the epicontinental seas of Laurentia. The associated benthic shelly fauna indicates a depositional environment within fair weather wave base (BA 2). The ancestry of Kinnella and this species appears most likely to lie among older, morphologically similar members of the Draboviidae which were seemingly confined to higher latitude faunal provinces prior to the Hirnantian glacial event. Thus, the mid−Ashgill occurrence of Kinnella laurentiana in the palaeotropically located Manitoulin Island region suggests the mixing of a probable cooler water taxon with the warmer water epicontinental shelly fauna of Laurentia, as well as a pos− sible earlier episode of low−latitude oceanic cooling. -
First Major Appearance of Brachiopod-Dominated Benthic Shelly Communities in the Reef Ecosystem During the Early Silurian Cale A.C
Western University Scholarship@Western Electronic Thesis and Dissertation Repository August 2016 First Major Appearance of Brachiopod-Dominated Benthic Shelly Communities in the Reef Ecosystem during the Early Silurian Cale A.C. Gushulak The University of Western Ontario Supervisor Dr. Jisuo Jin The University of Western Ontario Joint Supervisor Dr. Rong-yu Li The University of Western Ontario Graduate Program in Geology A thesis submitted in partial fulfillment of the requirements for the degree in Master of Science © Cale A.C. Gushulak 2016 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Evolution Commons, Other Ecology and Evolutionary Biology Commons, Paleobiology Commons, and the Paleontology Commons Recommended Citation Gushulak, Cale A.C., "First Major Appearance of Brachiopod-Dominated Benthic Shelly Communities in the Reef Ecosystem during the Early Silurian" (2016). Electronic Thesis and Dissertation Repository. 3972. https://ir.lib.uwo.ca/etd/3972 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected], [email protected]. Abstract The early Silurian reefs of the Attawapiskat Formation in the Hudson Bay Basin preserved the oldest record of major invasion of the coral-stromatoporoid skeletal reefs by brachiopods and other marine shelly benthos, providing an excellent opportunity for studying the early evolution, functional morphology, and community organization of the rich and diverse reef-dwelling brachiopods. Biometric and multivariate analysis demonstrate that the reef-dwelling Pentameroides septentrionalis evolved from the level- bottom-dwelling Pentameroides subrectus to develop a larger and more globular shell. -
Åsa Erlfeldt Brachiopod Faunal Dynamics During the Silurian Ireviken Event, Gotland, Sweden
Brachiopod faunal dynamics during the Silurian Ireviken Event, Gotland, Sweden Åsa Erlfeldt Examensarbeten i Geologi vid Lunds universitet - Berggrundsgeologi, nr. 199 Geologiska institutionen Centrum för GeoBiosfärsvetenskap Lunds universitet 2006 Contents 1 Introduction........................................................................................................................................................5 1.1 Brachiopods 5 2 The Ireviken Event.............................................................................................................................................6 3 Geological setting and stratigraphy..................................................................................................................7 3.1 The Lower and Upper Visby formations 8 4 Materials and methods ......................................................................................................................................9 4.1 Sampled materials 9 4.2 Literature studies 9 4.3 Preparation 9 5 Results ...............................................................................................................................................................10 5.1 Systematic palaeontology 10 6 Discussion..........................................................................................................................................................17 6.1 Comparison of sampled material and the data from the literature 18 6.1.1 The number of brachiopod species in the Lower and Upper Visby formations 18 6.1.2 -
A Kralodvorian (Upper Katian, Upper Ordovician)
A Kralodvorian (upper Katian, Upper Ordovician) benthic association from the Ferradosa Formation (Central Portugal) and its significance for the redefinition and subdivision of the Kralodvorian Stage JORGE COLMENAR, SOFIA PEREIRA, MIGUEL PIRES, CARLOS MARQUES DA SILVA, ARTUR ABREU SÁ & TIMOTHY P. YOUNG A new upper Katian (Kralodvorian Regional Stage) benthic association from the Riba de Cima Member of the Ferradosa Formation, Portugal, is described. It is dominated by bryozoans and echinoderms but brachiopods and trilobites are also present. More than 20 species of brachiopods, nine of trilobites and eight of echinoderms have been identified in the four studied localities. Among the brachiopods Kjaerina (Villasina) meloui Colmenar, 2016, Dolerorthis abeirensis Mélou, 1990 and Bicuspina cf. armoricana Mélou, 1990 are significant. These species were previously recorded only in the uppermost Rosan Formation (Armorican Massif, France). Porambonites dreyfussi Havlíček, 1981 is also reported in this paper for the first time besides its type horizon in the upper part of the Kralodvorian Gabian Formation (Montagne Noire, France). Most of the identified trilobite taxa were previously documented only in the Kralodvorian Cystoid Limestone Formation (Iberian Chains, Spain), except Parillaenus? cf. creber Hammann, 1992 and Amphoriops cf. inflatus (Hammann, 1992), whose referred species are also present in the upper Berounian–Kralodvorian Portixeddu Formation in Sardinia. The record of “Ceraurinus” meridianus (Hammann, 1992), “Bumastus” aff. commodus Apollonov, 1980 and Amphoriops cf. inflatus represent the first occurrence of these genera-groups in Portugal. These records are import- ant additions to the knowledge of the Portuguese Late Ordovician benthic marine communities, providing crucial new data to constrain the biostratigraphy of the Riba de Cima Member and the palaeogeographical setting of this region at that time. -
The Silurian of Central Kentucky, U.S.A.: Stratigraphy, Palaeoenvironments and Palaeoecology
The Silurian of central Kentucky, U.S.A.: Stratigraphy, palaeoenvironments and palaeoecology FRANK R. ETTENSOHN, R. THOMAS LIERMAN, CHARLES E. MASON, WILLIAM M. ANDREWS, R. TODD HENDRICKS, DANIEL J. PHELPS & LAWRENCE A. GORDON ETTENSOHN, F.R., LIERMAN, R.T., MASON, C.E., ANDREWS, W.M., HENDRICKS, R.T., PHELPS, D.J. & GORDON, L.A., 2013:04:26. The Silurian of central Kentucky, U.S.A.: Stratigraphy, palaeoenvironments and palaeoecology. Memoirs of the Association of Australasian Palaeontologists 44, 159-189. ISSN 0810-8889. Silurian rocks in Kentucky are exposed on the eastern and western flanks of the Cincinnati Arch, a large-wavelength cratonic structure separating the Appalachian foreland basin from the intracratonic Illinois Basin. The Cincinnati Arch area experienced uplift during latest Ordovician-early Silurian time, so that the exposed Silurian section is relatively thin due to onlap and post- Silurian erosional truncation on the arch. On both flanks of the arch, dolomitic carbonates predominate, but the section on the eastern side reflects a more shale-rich ramp that faced eastern Appalachian source areas. In the Silurian section on the western side of the arch, which apparently developed across a platform-like isolation-accommodation zone, shales are rare except dur- ing some highstand episodes, and rocks in the area reflect deposition across a broad, low-gradient shelf area, interrupted by structurally controlled topographic breaks. Using the progression of interpreted depositional environments and nearshore faunal communities, a relative sea-level curve, which parallels those of previous workers, was generated for the section in Kentucky. While the curve clearly shows the influence of glacial eustasy, distinct indications of the far-field, flexural influence of Taconian and Salinic tectonism are also present. -
Lithostratigraphy, Microlithofacies, And
Lithostratigraphy, Microlithofacies, and Conodont Biostratigraphy and Biofacies of the Wahoo Limestone (Carboniferous), Eastern Sadlerochit Mountains, Northeast Brooks Range, Alaska U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1568 j^^^fe^i^^t%t^^S%^A^tK-^^ ^.3lF Cover: Angular unconformity separating steeply dipping pre-Mississippian rocks from gently dipping carbonate rocks of the Lisburne Group near Sunset Pass, eastern Sadlerochit Mountains, northeast Brooks Range, Alaska. The image is a digital enhancement of the photograph (fig. 5) on page 9. Lithostratigraphy, Microlithofacies, and Conodont Biostratigraphy and Biofacies of the Wahoo Limestone (Carboniferous), Eastern Sadlerochit Mountains, Northeast Brooks Range, Alaska By Andrea P. Krumhardt, Anita G. Harris, and Keith F. Watts U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1568 Description of the lithostratigraphy, microlithofacies, and conodont bio stratigraphy and biofacies in a key section of a relatively widespread stratigraphic unit that straddles the Mississippian-Pennsylvanian boundary UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1996 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY GORDON P. EATON, Director For sale by U.S. Geological Survey, Information Services Box 25286, Federal Center, Denver, CO 80225 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. Published in the Eastern Region, Reston, Va. Manuscript approved for publication June 26, 1995. Library of Congress Cataloging in Publication Data Krumhardt, Andrea P. Lithostratigraphy, microlithofacies, and conodont biostratigraphy and biofacies of the Wahoo Limestone (Carboniferous), eastern Sadlerochit Mountains, northeast Brooks Range, Alaska / by Andrea P. Krumhardt, Anita G. Harris, and Keith F. -
1352 Colmenar.Vp
Upper Ordovician brachiopods from the Montagne Noire (France): endemic Gondwanan predecessors of Prehirnantian low-latitude immigrants JORGE COLMENAR, ENRIQUE VILLAS & DANIEL VIZCAÏNO The stratigraphy, brachiopod systematics and palaeoecology of the Upper Ordovician succession from the Cabrières Klippes, at the eastern ending of the southern slope of the Montagne Noire (southern France) are studied. Two new for- mations have been formally introduced: the Glauzy Formation (middle Katian, Ka2, in its uppermost fossiliferous strata) and the Gabian Formation (middle–upper Katian, Ka2–Ka4), to characterize, respectively, the thickly bedded quartzitic sandstones overlying volcaniclastic rocks, and the conformably overlying marls and limestones, rich in bryozoans, echinoderms and brachiopods. The systematic palaeontology of the brachiopods yielded in the uppermost beds of the Glauzy Formation has been studied, and five taxa are described, including a new platyorthid genus and species, Proclinorthis vailhanensis. The palaeoecological analysis of the Glauzy Fm., using both taphonomical and func- tional-morphological criteria, has allowed for the introduction of a new formal palaeoecological unit, the Svobodaina havliceki Community. It characterizes the recurrent low-diversity brachiopod association, usually dominated by S. havliceki, frequent in quartzitic sandstone lithofacies of the Upper Ordovician outcrops throughout southwestern Eu- rope. It is interpreted as having developed in the shore face environments of the Benthic Assemblage 3 (BA-3), along the Gondwanan Mediterranean margin during the early- and mid-Katian. This new community is bounded coastward by an undescribed rhynchonellid community (BA-2) and seaward by the Nicolella Community (also BA-3), during its latest time span. This study allows a better understanding of when, why and how occurred the replacement of Gondwanan en- demic associations, represented by the S. -
The Upper Ordovician Glaciation in Sw Libya – a Subsurface Perspective
J.C. Gutiérrez-Marco, I. Rábano and D. García-Bellido (eds.), Ordovician of the World. Cuadernos del Museo Geominero, 14. Instituto Geológico y Minero de España, Madrid. ISBN 978-84-7840-857-3 © Instituto Geológico y Minero de España 2011 ICE IN THE SAHARA: THE UPPER ORDOVICIAN GLACIATION IN SW LIBYA – A SUBSURFACE PERSPECTIVE N.D. McDougall1 and R. Gruenwald2 1 Repsol Exploración, Paseo de la Castellana 280, 28046 Madrid, Spain. [email protected] 2 REMSA, Dhat El-Imad Complex, Tower 3, Floor 9, Tripoli, Libya. Keywords: Ordovician, Libya, glaciation, Mamuniyat, Melaz Shugran, Hirnantian. INTRODUCTION An Upper Ordovician glacial episode is widely recognized as a significant event in the geological history of the Lower Paleozoic. This is especially so in the case of the Saharan Platform where Upper Ordovician sediments are well developed and represent a major target for hydrocarbon exploration. This paper is a brief summary of the results of fieldwork, in outcrops across SW Libya, together with the analysis of cores, hundreds of well logs (including many high quality image logs) and seismic lines focused on the uppermost Ordovician of the Murzuq Basin. STRATIGRAPHIC FRAMEWORK The uppermost Ordovician section is the youngest of three major sequences recognized widely across the entire Saharan Platform: Sequence CO1: Unconformably overlies the Precambrian or Infracambrian basement. It comprises the possible Upper Cambrian to Lowermost Ordovician Hassaouna Formation. Sequence CO2: Truncates CO1 along a low angle, Type II unconformity. It comprises the laterally extensive and distinctive Lower Ordovician (Tremadocian-Floian?) Achebayat Formation overlain, along a probable transgressive surface of erosion, by interbedded burrowed sandstones, cross-bedded channel-fill sandstones and mudstones of Middle Ordovician age (Dapingian-Sandbian), known as the Hawaz Formation, and interpreted as shallow-marine sediments deposited within a megaestuary or gulf. -
Brachiopod Genera of the Suborders Orthoidea and Pentameroidea
MEMOIRS OF THE PFABODY MITSEUM OF NATURAL HT'^TORY VOLUME IV, PART J Brachiopod Genera of the Suborders Orthoidea and Pentameroidea BY CHARLES SCHUCHERT PROFESSOR OF PALEONTOLOGY, FMFRtTUS, YALE UNIVERSITY AND G. ARTHUR COOPER ASSISTANT CURATOR OF STRATIGRAPHIC PALEONTOLOGY U. S. NATIONAL MUSEUM LVX ET VERITAS NEW HAVEN, CONN. 1932 MEMOIRS OF THE PEABODY MUSEUM OF NATURAL HISTORY YALE UNIVERSITY Volume I. Odontornithes: A Monograph on the Extinct Toothed Birds of North America. By Othniel Charles Marsh. Pp. i-ix, 1-201, pis. 1-34, text figs. 1-40. 1880. To be obtained from the Peabody Museum. Price $3. Volume II. Parti. Brachiospongidse : A Memoir on a Group of Silurian Sponges. By Charles Emerson Beecher. Pp. 1-28, pis. 1-6, text figs. 1-4. 1889. To be obtained from the Peabody Museum. Price $1. No more published. Volume III. Part 1. American Mesozoic Mammalia. By George Gaylord Simp- son. Pp. i-xvi, 1-171, pis. 1-32, text figs. 1-62. 1929. To be obtained from the Yale University Press, New Haven, Conn. Price $5. Part 2. A Remarkable Ground Sloth. By Richard Swann Lull. Pp. i-x, 1-20, pis. 1-9, text figs. 1-3. 1929. To be obtained from the Yale University Press, New Haven, Conn. Price $1. Part 3. A Revision of the Ceratopsia or Horned Dinosaurs. By Richard Swann Lull. In preparation. Part 4. The Merycoidodontids, an Extinct Group of Ruminant Mammals. By Malcolm Rutherford Thorpe. In preparation. Volume IV. Part 1. Brachiopod Genera of the Suborders Orthoidea and Pentam- eroidea. By Charles Schuchert and G.