G. Arthur Cooper
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Micropaleontology and Sequence Stratigraphy of Middle Jurassic D4- D5 Members of Dhruma Formation, Central Saudi Arabia]
-, SAUDI ARABIA BY MUHAMMAD HAMMAD MALIK A Thesis Presented to the DEANSHIP OF GRADUATE STUDIES KING FAHD UNIVERSITY OF PETROLEUM & MINERALS DHAHRAN, SAUDI ARABIA In Partial Fulfillment of the Requirements for the Degree of KING FAHD UNIVERSITY OF PETROLEUM & MINERALS DHAHRAN- 31261, SAUDI ARABIA DEANSHIP OF GRADUATE STUDIES This thesis, written by MUHAMMAD HAMMAD MALIK under the direction his thesis advisor and approved by his thesis committee, has been presented and accepted by the Dean of Graduate Studies, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN GEOLOGY. Prof. Michael A. Kaminski ar11>1� (Advisor) Dr. Abdulaziz Al-Shaibani Dr. Khalid Al-Ramadan Department Chairman (Member) - ' - ,-:· - -· v..)-UI, '__}...;_,� • :,�..... -. "'.J :- ' v ?_ _ _D__ r r a_ -al '!S,m-""-- A--. Z-u_m_m_ o � � �� Dr. Lamidi 0. Babalola Dean of Graduate Studies §1 � (Member) . e r ;:un.'l��S'/., ,2- I<\''- Date © Muhammad Hammad Malik 2016 iii Dedication This work is dedicated to ALLAH Almighty who gave me strength, courage and ability to perform all the tasks and to myself because I am the one who suffered alone. iv ACKNOWLEDGMENTS In the name of ALLAH, the most Gracious and most Merciful First of all, I want to thank ALLAH almighty who give me the courage and strength and provide me with the opportunity to study in one of the prestigious universities of the world. I would also like to thanks my parents, my father Zulfiqar Ahmed Malik and my mother whose prayers led me reach to the position I am at right now. I would also extend my thanks to Prof. -
Mechanics Unlocks the Morphogenetic Puzzle of Interlocking Bivalved Shells
Mechanics unlocks the morphogenetic puzzle of interlocking bivalved shells Derek E. Moultona,1 , Alain Gorielya , and Regis´ Chiratb aMathematical Institute, University of Oxford, Oxford, OX2 6GG, United Kingdom; and bCNRS 5276, LGL-TPE (Le Laboratoire de Geologie´ de Lyon: Terre, Planetes,` Environnement), Universite´ Lyon 1, 69622 Villeurbanne Cedex, France Edited by Sean H. Rice, Texas Tech University, Lubbock, TX, and accepted by Editorial Board Member David Jablonski November 11, 2019 (received for review September 24, 2019) Brachiopods and mollusks are 2 shell-bearing phyla that diverged tal events causing shell injuries. Yet, in all cases the interlocking from a common shell-less ancestor more than 540 million years ago. of the 2 shell edges is tightly maintained. These observations Brachiopods and bivalve mollusks have also convergently evolved imply that the interlocking pattern emerges as the result of epi- a bivalved shell that displays an apparently mundane, yet strik- genetic interactions modulating the behavior of the secreting ing feature from a developmental point of view: When the shell mantle during shell development. is closed, the 2 valve edges meet each other in a commissure that Here, we provide a geometric and mechanical explanation forms a continuum with no gaps or overlaps despite the fact that for this morphological trait based on a detailed analysis of the each valve, secreted by 2 mantle lobes, may present antisymmet- shell geometry during growth and the physical interaction of the ric ornamental patterns of varying regularity and size. Interlock- shell-secreting soft mantle with both the rigid shell edge and ing is maintained throughout the entirety of development, even the opposing mantle lobe. -
Les Brachiopodes De La Collection Eudes-Deslongchamps Du Muséum De Gaillac (Tarn)
Les Carnets natures, 2014, vol. 1 Les Brachiopodes de la collection Eudes-Deslongchamps Du muséum de Gaillac (Tarn) Yves ALMéRAS, Michel COUGNON, Bernard GUIBBERT & Philippe FAURé Yves Alméras : Université Claude-Bernard-Lyon 1, Département des Sciences de la Terre, Campus universitaire de la Doua, bâtiment Géode, 2 rue Raphaël Dubois, 69622 Villeurbanne Cedex, France. E-mail : yves.almeras0827@ orange.fr Michel Cougnon : E-mail : [email protected] Bernard Guibbert : E-mail : [email protected] Philippe Fauré : Muséum d’Histoire naturelle de Toulouse, allées Jules Guesdes, F-31000 Toulouse. E-mail : [email protected] Résumé Les collections du Musée de Gaillac renferment un important fond de fossiles provenant du Jurassique de Normandie. Ceux-ci furent recueillis à la fin du 19ème siècle par le Dr. Philadelphe Thomas profitant de ses bonnes relations avec le paléontologue normand Eugène Eudes-Deslongchamps. On y trouve en particulier un important lot de Brachiopodes déterminés et étiquetés par cet éminent spécialiste des Brachiopodes jurassiques. La disparition de la collection originale du Musée de Caen sous les bombes des alliés en 1944 en fait toute la valeur car les collections du Musée de Gaillac renferment un certain nombre de topotypes (ou néotypes) éventuels. La présente publication donne une brève description des espèces de Brachiopodes jurassiques conservées à Gaillac. Ces descriptions sont précédées d’une synonymie précisant la diagnose originale de chaque espèce, ainsi que la référence à une récente publication, ce qui permet au lecteur de retrouver toutes les données relatives à ces espèces (variabilité morphologique, caractères internes, âges et répartitions géographiques, principales figurations par les auteurs successifs). -
VOL. 28, N° 2, 2009 Revue De Paléobiologie, Genève (Décembre 2009) 28 (2) : 471-489 ISSN 0253-6730
1661-5468 VOL. 28, N° 2, 2009 Revue de Paléobiologie, Genève (décembre 2009) 28 (2) : 471-489 ISSN 0253-6730 discussion, evolution and new interpretation of the Tornquistes Lemoine, 1910 (Pachyceratidae, Ammonitina) with the exemple of the Vertebrale Subzone sample (Middle oxfordian) of southeastern France Didier BerT*, 1 Abstract The Cheiron Mountain (Alpes-Maritimes, southeastern France) sample of Tornquistes Lemoine was collected in the Arkelli Biohorizon (Vertebrale Subzone, Plicatilis Biozone). Its study reveals its homogeneity whereas its morphology is between two nominal and classical species of literature : Tornquistes tornquisti (de LorioL) and Tornquistes oxfordiense (tornquist). It appears that the features usually taken into account to establish specific denominations in this genus (whorl section thickness, strength and density of the ornamentation, widening of the umbilicus) are in fact manifestations of the laws of covariation of the characteristics, and the extreme morphologies are interrelated by all intermediaries. There is now no taxonomical reason not to consider all the nominal taxa described in the Plicatilis Biozone as a single paleobiological species : Tornquistes helvetiae (tornquist). On the other hand, the stratigraphic polarity of the position of the primary ribs point of bifurcation (which decreases through time) is a major evolutionary feature in Tornquistes. It now allows defining at least three, maybe four, successive chronospecies : (1) (?) Tornquistes greppini (de LorioL), (2) Tornquistes leckenbyi (ArkeLL), (3) Tornquistes helveticus (JeAnnet) and (4) Tornquistes helvetiae (tornquist). Finally, although Protophites eBrAy has often been regarded as a microconch, it is clearly not the one of Tornquistes. The oldest species of Protophites now recognized is Protophites chapuisi (de LorioL) at the top of the Mariae Biozone (Praecordatum Subzone). -
Combined Analysis of Extant Rhynchonellida (Brachiopoda) Using Morphological and Molecular Data
Syst. Biol. 67(1):32–48, 2018 © The Author(s) 2017. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. DOI:10.1093/sysbio/syx049 Advance Access publication May 8, 2017 Combined Analysis of Extant Rhynchonellida (Brachiopoda) using Morphological and Molecular Data ,∗ , DAV I D W. BAPST1 ,HOLLY A. SCHREIBER1 2, AND SANDRA J. CARLSON1 1Department of Earth and Planetary Sciences, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; and 2Penn Dixie Fossil Park and Nature Reserve, 3556 Lakeshore Rd, Ste. 210 Blasdell, NY 14219, USA ∗ Correspondence to be sent to: Department of Earth and Planetary Sciences, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; E-mail: [email protected]. Received 5 August 2016; reviews returned 14 October 2016; accepted 28 April 2017 Associate Editor: Ken Halanych Abstract.—Independent molecular and morphological phylogenetic analyses have often produced discordant results for certain groups which, for fossil-rich groups, raises the possibility that morphological data might mislead in those groups for which we depend upon morphology the most. Rhynchonellide brachiopods, with more than 500 extinct genera but only 19 extant genera represented today, provide an opportunity to explore the factors that produce contentious phylogenetic signal across datasets, as previous phylogenetic hypotheses generated from molecular sequence data bear little agreement with those constructed using morphological characters. -
Dimerelloid Rhynchonellide Brachiopods in the Lower Jurassic of the Engadine (Canton Graubünden, National Park, Switzerland)
1661-8726/08/010203–20 Swiss J. Geosci. 101 (2008) 203–222 DOI 10.1007/s00015-008-1250-8 Birkhäuser Verlag, Basel, 2008 Dimerelloid rhynchonellide brachiopods in the Lower Jurassic of the Engadine (Canton Graubünden, National Park, Switzerland) HEINZ SULSER & HEINZ FURRER * Key words: brachiopoda, Sulcirostra, Carapezzia, new species, Lower Jurassic, Austroalpine ABSTRACT ZUSAMMENFASSUNG New brachiopods (Dimerelloidea, Rhynchonellida) from Lower Jurassic Neue Brachiopoden (Dimerelloidea, Rhynchonellida) aus unterjurassischen (?lower Hettangian) hemipelagic sediments of the Swiss National Park in hemipelagischen Sedimenten (?unteres Hettangian) des Schweizerischen Na- south-eastern Engadine are described: Sulcirostra doesseggeri sp. nov. and tionalparks im südöstlichen Engadin werden als Sulcirostra doesseggeri sp. Carapezzia engadinensis sp. nov. Sulcirostra doesseggeri is externally similar to nov. und Carapezzia engadinensis sp. nov. beschrieben. Sulcirostra doesseggeri S. fuggeri (FRAUSCHER 1883), a dubious species, that could not be included in ist äusserlich S. fuggeri (FRAUSCHER 1883) ähnlich, einer zweifelhaften Spezies, a comparative study, because relevant samples no longer exist. A single speci- die nicht in eine vergleichende Untersuchung einbezogen werden konnte, weil men was tentatively assigned to Sulcirostra ?zitteli (BÖSE 1894) by comparison kein relevantes Material mehr vorhanden ist. Ein einzelnes Exemplar wird als of its external morphology with S. zitteli from the type locality. The partly Sulcirostra ?zitteli (BÖSE 1894) bezeichnet, im Vergleich mit der Aussenmor- silicified brachiopods are associated with sponge spicules, radiolarians and phologie von S. zitteli der Typuslokalität. Die teilweise silizifizierten Brachio- crinoid ossicles. Macrofossils are rare: dictyid sponges, gastropods, bivalves, poden waren mit Schwammnadeln, Radiolarien und Crinoiden-Stielgliedern crustaceans, shark teeth and scales of an actinopterygian fish. The Lower Ju- assoziiert. -
Occurrences, Age and Paleobiogeography of Rare Genera Phlycticeras and Pachyerymnoceras from South Tethys
N. Jb. Geol. Paläont. Abh. 283/2 (2017), 119–149 Article E Stuttgart, February 2017 Occurrences, age and paleobiogeography of rare genera Phlycticeras and Pachyerymnoceras from South Tethys Sreepat Jain With 24 figures Abstract: New data on two rare genera (Phlycticeras and Pachyerymnoceras) from the Callovian (Middle Jurassic) sediments of Kachchh, western India are presented with an update on their South Tethyan occurrences. This paper documents the earliest occurrence of the genus Phlycticeras from the entire south of Tethys (P. polygonium var. polygonium [M]) from latest Early Callovian sediments (= Proximum Subzone, Gracilis Zone). Further, in light of the new taxonomic data, the previously recorded early Middle Callovian P. gr. pustulatum [M] is reevaluated as also all other Phlycticeras occurrences from the Indian subcontinent. Data suggests that in Kachchh, Phlycticeras has a long range from the latest Early to Late Callovian interval. Additionally, two new macroconch species of Pachyerymnoceras are also described and illustrated from Late Callovian sediments. A critical review of previous records suggests that in Kachchh, Pachyerymnoceras is restricted to the Submediterranean interval of the Collotiformis-Poculum subzones of the Athleta Zone. A note on the paleobiogeography and probable migratory routes of these two genera to India and elsewhere is also suggested. Key words: Kachchh, Middle Jurassic, Late Callovian, Pachyerymnoceras, Phlycticeras. 1. Introduction nent, stratigraphically precise data is scarce both for Pachyceratidae BUckMAN (WAAGEN 1873-1875; BUck- Kachchh (Fig. 1) is a prolific Jurassic ammonite area in MAN 1909-1930; SPATH 1927-1933; KRISHNA & THIErrY the Indo-Madagascan faunal Province (South Tethys) 1987; SHOME & BARDHAN 2005) and Phlycticeratinae which has been extensively studied for its taxonomic, SPATH (WAAGEN 1873-1875; SPATH 1927-1933; JAIN 1997; biochronostratigraphic and paleobiogeographic signifi- BARDHAN et al. -
Aubrecht Field Trip Guide 2012
Journal of Alpine Geology, 54: 1-32, Wien 2012 Paleokarst, neptunian dykes, collapse breccias, mud-mounds and sedimentary unconformities By ROMAN A UBRECHT With 55 figures Field Trip Guide 29th IAS Meeting of Sedimentology Schladming, Austria Addresses of the Author: Department of Geology and Paleontology Faculty of Natural Sciences Comenius University Mlynska dolina - G 842 15 Bratislava Slovakia E-mail: [email protected] Geophysical Institute Slovak Academy of Sciences Dubravska cesta 9 SK-845 28 Bratislava Slovakia Journal of Alpine Geology 54 S. 1-32 Wien 2012 1 AUBRECHT: Paleokarst, neptunian dykes, collapse breccias, mud-mounds and sedimentary unconformities Content Abstract............................................................................................................................................................................2 1. Topics and area of the Field Trip.....................................................................................................................................2 2. Introduction..................................................................................................................................................................4 3. The field trip..................................................................................................................................................................4 3.1. Lower and Middle Miocene transgression on the shores of Vienna Basin and the pre-transgression paleokarst.........4 Stop 1: Devin Castle..............................................................................................................................................5 -
Inside: GSA Bookstore Update, a Special Insert, P
VOL. 14, NO. 6 A PUBLICATION OF THE GEOLOGICAL SOCIETY OF AMERICA JUNE 2004 Title Sponsor of the 2004 GSA Annual Meeting. Inside: GSA Bookstore Update, A Special Insert, p. 33 Limnogeology Division Award, p. 59 GeoMart Geoscience Directory, p. 62 VOLUME 14, NUMBER 6 JUNE 2004 GSA TODAY publishes news and information for more than 18,000 GSA members and subscribing libraries. GSA Today Cover Images: Upper left: “The Big Blue lead science articles should present the results of exciting new research or summarize and synthesize important problems or Marble,” courtesy of NASA. Lower left: Larson issues, and they must be understandable to all in the earth B Ice Shelf collapse. Image courtesy of NASA/ science community. Submit manuscripts to science editors GSFC/LaRC/JPL, MISR Team. View of the Keith A. Howard, [email protected], or Gerald M. Ross, Soyuz TMA-2 spacecraft docked to the cargo [email protected]. block on the International Space Station. GSA TODAY (ISSN 1052-5173 USPS 0456-530) is published 11 Image courtesy of the crew of ISS Expedition times per year, monthly, with a combined April/May issue, by The Geological Society of America, Inc., with offices at 3300 Penrose 7, NASA. Place, Boulder, Colorado. Mailing address: P.O. Box 9140, Boulder, CO 80301-9140, U.S.A. Periodicals postage paid at Boulder, Colorado, and at additional mailing offices. Postmaster: Send address changes to GSA Today, GSA Sales and Service, P.O. Box 9140, Boulder, CO 80301-9140. Copyright © 2004, The Geological Society of America, Inc. (GSA). Geoscience in a Changing World: Denver 2004 All rights reserved. -
Brachiopodes Du Lias Et Du Dogger
DOCUMENTS DES LABORATOIRES DE GÉOLOGIE DE LA FACULTÉ DES SCIENCES DE LYON N° 5 BRACHIOPODES DU LIAS ET DU DOGGER ESSAI BIBLIOGRAPHIQUE ET CRITIQUE DE PALEONTOLOGIE STRATIGRAPHIQUE par Y. ALMERAS Imprimerie Rhodanienne - LYON 1964 INTRODUCTION Lorsque l'on se propose d'étudier les Brachiopodes du Lias et du Dogger , on est surpris par le grand nombre d'espèces créées aussi bien que par le nombre d'ou vrages décrivant des Brachiopodes . Devant un sujet aussi vaste , devant des ef forts aussi dispersés , il m'a paru opportun de faire le point : dénombrer les es pèces nouvelles d'après les recherches bibliographiques , mettre sur fiches méca- nalytiques leurs diagnoses originales , établir les listes synonymiques critiques est le premier travail à effectuer et il a pour résultat l'obtention de la durée moyenne de vie pour chaque espèce (répartition stratigraphique) . Le . présent ouvrage comprend : - I - Bibliographie des Brachiopodes du Lias et du Dogger (essentielle ment en Europe occidentale) , aussi complète que possible . - II - Tableau de répartition stratigraphique des espèces de Brachiopodes (1), d'après la littérature citée au chapitre I. - III - Remarques accompagnant le tableau de répartition stratigraphique. Il s'agit de remarques (que l'on peut rapporter à telle ou telle espèce d'après un numéro mis entre parenthèses après le nom de chaque forme) ayant trait à la répartition stratigraphique elle-même , ou bien de remarques paléontologiques (va riabilité de l'espèce , interprétation de l'espèce par différents auteurs , création d'espèces sur des figures d'autres auteurs , changements intervenus dans la dé nomination générique de l'espèce) . - IV - Liste des taxons cités . -
New Barremian Rhynchonellide Brachiopod from Serbia and The
New Barremian rhynchonellide brachiopod genus from Serbia and the shell microstructure of Tetrarhynchiidae BARBARA RADULOVIĆ, NEDA MOTCHUROVA−DEKOVA, and VLADAN RADULOVIĆ Radulović, B., Motchurova−Dekova, N., and Radulović, V. 2007. New Barremian rhynchonellide brachiopod from Ser− bia and the shell microstructure of Tetrarhynchiidae. Acta Palaeontologica Polonica 52 (4): 761–782. A new rhynchonellide brachiopod genus Antulanella is erected based on the examination of the external and internal morphologies and shell microstructure of “Rhynchonella pancici”, a common species in the Barremian shallow−water limestones of the Carpatho−Balkanides of eastern Serbia. The new genus is assigned to the subfamily Viarhynchiinae, family Tetrarhynchiidae. The shell of Antulanella is small to rarely medium−sized, subglobose, subcircular, fully costate, with hypothyrid rimmed foramen. The dorsal euseptoidum is much reduced. The dental plates are thin, ventrally diver− gent. The hinge plates are straight to ventrally convex. The crura possess widened distal ends, rarely raduliform or canaliform. The shell is composed of two calcitic layers. The secondary layer is fine fibrous, homogeneous built up of predominantly anisometric anvil−like fibres. Although data on the shell microstructure of post−Palaeozoic rhyncho− nellides are still incomplete, it is possible to distinguish two types of secondary layer: (i) fine fibrous typical of the superfamilies Rhynchonelloidea and Hemithiridoidea and (ii) coarse fibrous typical of the superfamilies Pugnacoidea, Wellerelloidea, and Norelloidea. The new genus Antulanella has a fine fibrous microstructure of the secondary layer, which is consistent with its allocation in the Hemithiridoidea. Antulanella pancici occurs in association with other brachi− opods showing strong Peritethyan affinity and close resemblance to the Jura fauna (= Subtethyan fauna). -
Paleontological Contributions
THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS May 15, 1970 Paper 47 SIGNIFICANCE OF SUTURES IN PHYLOGENY OF AMMONOIDEA JURGEN KULLMANN AND JOST WIEDMANN Universinit Tubingen, Germany ABSTRACT Because of their complex structure ammonoid sutures offer best possibilities for the recognition of homologies. Sutures comprise a set of individual elements, which may be changed during the course of ontogeny and phylogeny as a result of heterotopy, hetero- morphy, and heterochrony. By means of a morphogenetic symbol terminology, sutural formulas may be established which show the composition of adult sutures as well as their ontogenetic development. WEDEKIND ' S terminology system is preferred because it is the oldest and morphogenetically the most consequent, whereas RUZHENTSEV ' S system seems to be inadequate because of its usage of different symbols for homologous elements. WEDEKIND ' S system includes only five symbols: E (for external lobe), L (for lateral lobe), I (for internal lobe), A (for adventitious lobe), U (for umbilical lobe). Investigations on ontogenetic development show that all taxonomic groups of the entire superorder Ammonoidea can be compared one with another by means of their sutural development, expressed by their sutural formulas. Most of the higher and many of the lower taxa can be solely characterized and arranged in phylogenetic relationship by use of their sutural formulas. INTRODUCTION Today very few ammonoid workers doubt the (e.g., conch shape, sculpture, growth lines) rep- importance of sutures as indication of ammonoid resent less complicated structures; therefore, phylogeny. The considerable advances in our numerous homeomorphs restrict the usefulness of knowledge of ammonoid evolution during recent these features for phylogenetic investigations.