DOCSLIB.ORG

A Late Cretaceous (Cenomanian) Marine

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Late Cretaceous (Cenomanian) Marine A LATE CRETACEOUS (CENOMANIAN) MARINE VERTEBRATE-RICH BIOCLASTIC HORIZON FROM THE NORTHEASTERN MARGIN OF THE WESTERN INTERIOR SEAWAY, CANADA Aaron Phillips A thesis submitted to the Faculty of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science Department of Earth Sciences Carleton University Ottawa-Carleton Geoscience Centre Ottawa, Ontario May 2008 ©Copyright 2008, Aaron Phillips Library and Bibliotheque et 1*1 Archives Canada Archives Canada Published Heritage Direction du Branch Patrimoine de I'edition 395 Wellington Street 395, rue Wellington Ottawa ON K1A0N4 Ottawa ON K1A0N4 Canada Canada Your file Votre reference ISBN: 978-0-494-40661-8 Our file Notre reference ISBN: 978-0-494-40661-8 NOTICE: AVIS: The author has granted a non­ L'auteur a accorde une licence non exclusive exclusive license allowing Library permettant a la Bibliotheque et Archives and Archives Canada to reproduce, Canada de reproduire, publier, archiver, publish, archive, preserve, conserve, sauvegarder, conserver, transmettre au public communicate to the public by par telecommunication ou par Plntemet, prefer, telecommunication or on the Internet, distribuer et vendre des theses partout dans loan, distribute and sell theses le monde, a des fins commerciales ou autres, worldwide, for commercial or non­ sur support microforme, papier, electronique commercial purposes, in microform, et/ou autres formats. paper, electronic and/or any other formats. The author retains copyright L'auteur conserve la propriete du droit d'auteur ownership and moral rights in et des droits moraux qui protege cette these. this thesis. Neither the thesis Ni la these ni des extraits substantiels de nor substantial extracts from it celle-ci ne doivent etre imprimes ou autrement may be printed or otherwise reproduits sans son autorisation. reproduced without the author's permission. In compliance with the Canadian Conformement a la loi canadienne Privacy Act some supporting sur la protection de la vie privee, forms may have been removed quelques formulaires secondaires from this thesis. ont ete enleves de cette these. While these forms may be included Bien que ces formulaires in the document page count, aient inclus dans la pagination, their removal does not represent il n'y aura aucun contenu manquant. any loss of content from the thesis. Canada ABSTRACT Throughout the Cretaceous Western Canadian Sedimentary Basin, concentrations of the remains of fossilized marine vertebrates & invertebrates (macrofossils) occur as dense bioclastic and bonebed horizons. In Manitoba and Saskatchewan, Canada, these horizons are particularly abundant within the Belle Fourche Member of the Ashville Formation, deposited along the eastern margin of the Cenomanian Western Interior Seaway (WIS). Concentrations of abundant bones, teeth, and scales of marine and, very rarely, terrestrial, vertebrates are found along with bivalve-rich horizons such as the regionally wide-spread Ostrea beloiti layer along the length of the Manitoba Escarpment. A newly discovered locality near the southern end of the escarpment has yielded calcarenites, composed primarily of inoceramid-derived calcitic prisms and abundant, disarticulated marine vertebrate elements and microcoprolites, as well as oyster valves. Stratigraphically, these deposits are believed to be of early Middle Cenomanian age, originating lower in the Belle Fourche Member than previously described marine vertebrate bonebeds from the region. The preserved vertebrate fossils reveal a diverse paleocommunity comprised of 12 chondrichthyan taxa, 13 osteichthyan taxa, and 2 reptilian taxa. Several of these, including Protosphyraena sp., Squalicorax falcatus, a salmoniform, Xiphactinus audax, Enchodus cf. E. gladiolus, Enchodus cf. E. petrosus, and Enchodus cf. E. shumardi represent earliest occurrences of these taxa in Canada and/or North America, as well as what may be the earliest evidence of eels (Order Anguilliformes) on this continent. Taphonomic data indicates that the bioclasts were concentrated by physical processes such as winnowing, as well as by the siliciclastically-starved setting of the ii eastern margin of the WIS. Evidence of minor transportation, winnowing, and reworking are taken to indicate these bioclastic sediments were initially deposited relatively further offshore than other bonebeds known from the Manitoba Escarpment, at or just beneath storm wave base. Petrographic study of the bonebeds reveals that variability in the amount of inoceramid-derived prismatic calcite buried along with the concentrated vertebrate bioclasts may have affected the timing of cementation, and therefore the susceptibility of these deposits to further reworking. Comparison with skeletal limestones known from the Greenhorn Limestone in the United States suggests that the calcarenites studied here were deposited in a similar manner: as the result of storms (i.e. as tempestites) impinging on the extremely shallowly sloping sea floor of the eastern margin of the Western Interior Seaway, during one of the frequent oscillations of sea-level during the Cenomanian. Cretaceous marine bioclastic and bonebed horizons are widespread in the WIS and may eventually serve as stratigraphic and sequence stratigraphic markers integrated into a basinwide framework. iii ACKNOWLEDGEMENTS Sincere thanks go to my supervisors Dr. Stephen L. Cumbaa and Dr. Claudia Schroder-Adams for an excellent and challenging M.Sc. project, as well as for their unwavering guidance, instruction, patience and support throughout this project. Steve's energy and enthusiasm for fossil fishes, and Claudia's untiring pursuit of "the big picture" in the WIS, were inspirational. Research funding for this project was supplied by NSERC Discovery Grants to Dr S. L. Cumbaa and Dr. C. Schroder-Adams. I would also like to thank Mr. and Mrs. Henry Van der Voort of Riding Mountain, MB, and Dwayne and Debbie Unger of Kelwood, MB, for access to the site that was so pivotal to my research. Thanks also go to the Manitoba Museum and the Royal Saskatchewan Museum for access to my study material. Special thanks go out to the 2006 Field Party; especially Richard Day, for his wisdom both technical and practical. Further thanks are due to Glenn Poirier at the CMN, who gave freely of his time and expertise on the SEM and the microprobe, and to James Haggart of the GSC for his efforts to identify our mysterious molluscs. The students, faculty and staff of the Earth Sciences Dept. at Carleton University also deserve thanks, many having contributed in some way, with special thanks to David Mans in particular. Dave's work ethic was inspirational (however much it actually rubbed off on me), and one couldn't have asked for a better "comrade-in­ arms". Eternal gratitude goes out to my parents and my sisters, whose unconditional love, encouragement, and support has always been felt no matter where in the country I may be. Last but by no means least, from the very bottom of my heart I extend thanks to Julie Gundry for her love, patience, support, encouragement, sacrifice, humour and inspiration, which have helped this project come to fruition in ways too numerous to count. iv TABLE OF CONTENTS THESIS ACCEPTANCE i ABSTRACT ii ACKNOWLEDGEMENTS iv TABLE OF CONTENTS v LIST OF FIGURES viii LIST OF TABLES xv LIST OF APPENDICES xvi Introduction 1 Geological Setting 3 The Western Canadian Sedimentary Basin 3 Tectonic Setting and Basin Architecture 3 Patterns of Sedimentation 5 The Late Cretaceous Western Interior Seaway 5 Sea-level History 5 Paleoenvironmental Conditions 9 The Manitoba Escarpment 10 Stratigraphic Relationships of The Belle Fourche Member 12 Lower Belle Fourche Member of the Ashville Formation 14 Regional Correlation and Significance of the "Fish Scale Marker Beds" 14 Lithology and Biostratigraphy 15 Depositional Environment of the Fish Scales Formation 18 v Upper Belle Fourche Member 19 Bio- and Chronostratigraphy 19 Bonebeds 20 Stratigraphic Placement of Bonebeds 21 Materials and Methods 22 The Van der Voort Farm Calcarenite 24 Acid Preparation 24 Taxonomic Survey 26 Comparative Taphonomic Census 27 Size 27 Shape 28 Abrasion 28 Faunal Diversity and Abundance 30 Petrographic Analysis 30 Electron Microprobe Analysis and Scanning Electron Microscopy 31 Petrographic Point Count Analysis 31 Results 32 Surficial Description of the Van der Voort Farm Calcarenites 32 Systematic Paleontology 32 Comparative Taphonomic Census 77 Shape 77 Size 81 Abrasion 81 vi Diversity 85 Summary 89 Petrographic Analysis 89 Vander Voort 90 Bainbridge River (BR-3) 93 Bainbridge River (BR-1) 96 Carrot River (DH-1) 100 Thunder Hill 103 Discussion 107 Biostratigraphy 107 Taphonomic Interpretations 118 Taphonomic Overprint at the Van der Voort Locality 118 The Comparative Taphonomic Census 122 Diagenetic Interpretations 123 Paleoecology 132 Vertebrate Faunal Distribution in the Western Interior Seaway 132 Paleoecological Interpretations 140 Paleoenvironmental Interpretations 148 Conclusions 154 References 156 Plates 183 Appendices 206 vii LIST OF FIGURES Figure 1. Schematic diagram of a representative cross-section through the Western Interior Seaway (WIS) (modified after Decelles and Giles, 1996). Sediments deposited within the Manitoba Escarpment are located approximately within the area designated by "MB Escpt" 4 Figure 2. Paleogeographic maps showing the extent of epeiric sea coverage during A) the Late Late Albian and B) the Late Early Turonian (modified from Williams and Stelck, 1975) 6 Figure 3. Global transgressive-regressive
Load more

Recommended publications
  • Vertebral Morphology, Dentition, Age, Growth, and Ecology of the Large Lamniform Shark Cardabiodon Ricki
    Vertebral morphology, dentition, age, growth, and ecology of the large lamniform shark Cardabiodon ricki MICHAEL G. NEWBREY, MIKAEL SIVERSSON, TODD D. COOK, ALLISON M. FOTHERINGHAM, and REBECCA L. SANCHEZ Newbrey, M.G., Siversson, M., Cook, T.D., Fotheringham, A.M., and Sanchez, R.L. 2015. Vertebral morphology, denti- tion, age, growth, and ecology of the large lamniform shark Cardabiodon ricki. Acta Palaeontologica Polonica 60 (4): 877–897. Cardabiodon ricki and Cardabiodon venator were large lamniform sharks with a patchy but global distribution in the Cenomanian and Turonian. Their teeth are generally rare and skeletal elements are less common. The centra of Cardabiodon ricki can be distinguished from those of other lamniforms by their unique combination of characteristics: medium length, round articulating outline with a very thick corpus calcareum, a corpus calcareum with a laterally flat rim, robust radial lamellae, thick radial lamellae that occur in low density, concentric lamellae absent, small circular or subovate pores concentrated next to each corpus calcareum, and papillose circular ridges on the surface of the corpus calcareum. The large diameter and robustness of the centra of two examined specimens suggest that Cardabiodon was large, had a rigid vertebral column, and was a fast swimmer. The sectioned corpora calcarea show both individuals deposited 13 bands (assumed to represent annual increments) after the birth ring. The identification of the birth ring is supported in the holotype of Cardabiodon ricki as the back-calculated tooth size at age 0 is nearly equal to the size of the smallest known isolated tooth of this species. The birth ring size (5–6.6 mm radial distance [RD]) overlaps with that of Archaeolamna kopingensis (5.4 mm RD) and the range of variation of Cretoxyrhina mantelli (6–11.6 mm RD) from the Smoky Hill Chalk, Niobrara Formation.
    [Show full text]
  • Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas
    Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253 Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas By WILLIAM A. COBBAN and E. A. MEREWETHER Molluscan Fossil Record from the Northeastern Part of the Upper Cretaceous Seaway, Western Interior By WILLIAM A. COBBAN Lower Upper Cretaceous Strata in Minnesota and Adjacent Areas-Time-Stratigraphic Correlations. and Structural Attitudes By E. A. M EREWETHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1 2 53 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916 Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. (Geological Survey Professional Paper 1253) Bibliography: 52 p. Supt. of Docs. no.: I 19.16 A. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior by William A. Cobban. B. Lower Upper Cretaceous strata in Minnesota and adjacent areas-time-stratigraphic correlations and structural attitudes by E. A. Merewether. I. Mollusks, Fossil-Middle West. 2. Geology, Stratigraphic-Cretaceous. 3. Geology-Middle West. 4. Paleontology-Cretaceous. 5. Paleontology-Middle West. I. Merewether, E. A. (Edward Allen), 1930. II. Title. III. Series. QE687.C6 551.7'7'09776 81--607803 AACR2 For sale by the Distribution Branch, U.S.
    [Show full text]
  • Annotated Checklist of Fossil Fishes from the Smoky Hill Chalk of the Niobrara Chalk (Upper Cretaceous) in Kansas
    Lucas, S. G. and Sullivan, R.M., eds., 2006, Late Cretaceous vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35. 193 ANNOTATED CHECKLIST OF FOSSIL FISHES FROM THE SMOKY HILL CHALK OF THE NIOBRARA CHALK (UPPER CRETACEOUS) IN KANSAS KENSHU SHIMADA1 AND CHRISTOPHER FIELITZ2 1Environmental Science Program and Department of Biological Sciences, DePaul University,2325 North Clifton Avenue, Chicago, Illinois 60614; and Sternberg Museum of Natural History, Fort Hays State University, 3000 Sternberg Drive, Hays, Kansas 67601;2Department of Biology, Emory & Henry College, P.O. Box 947, Emory, Virginia 24327 Abstract—The Smoky Hill Chalk Member of the Niobrara Chalk is an Upper Cretaceous marine deposit found in Kansas and adjacent states in North America. The rock, which was formed under the Western Interior Sea, has a long history of yielding spectacular fossil marine vertebrates, including fishes. Here, we present an annotated taxo- nomic list of fossil fishes (= non-tetrapod vertebrates) described from the Smoky Hill Chalk based on published records. Our study shows that there are a total of 643 referable paleoichthyological specimens from the Smoky Hill Chalk documented in literature of which 133 belong to chondrichthyans and 510 to osteichthyans. These 643 specimens support the occurrence of a minimum of 70 species, comprising at least 16 chondrichthyans and 54 osteichthyans. Of these 70 species, 44 are represented by type specimens from the Smoky Hill Chalk. However, it must be noted that the fossil record of Niobrara fishes shows evidence of preservation, collecting, and research biases, and that the paleofauna is a time-averaged assemblage over five million years of chalk deposition.
    [Show full text]
  • Papers in Press
    Papers in Press “Papers in Press” includes peer-reviewed, accepted manuscripts of research articles, reviews, and short notes to be published in Paleontological Research. They have not yet been copy edited and/or formatted in the publication style of Paleontological Research. As soon as they are printed, they will be removed from this website. Please note they can be cited using the year of online publication and the DOI, as follows: Humblet, M. and Iryu, Y. 2014: Pleistocene coral assemblages on Irabu-jima, South Ryukyu Islands, Japan. Paleontological Research, doi: 10.2517/2014PR020. doi:10.2517/2018PR013 Features and paleoecological significance of the shark fauna from the Upper Cretaceous Hinoshima Formation, Himenoura Group, Southwest Japan Accepted Naoshi Kitamura 4-8-7 Motoyama, Chuo-ku Kumamoto, Kumamoto 860-0821, Japan (e-mail: [email protected]) Abstract. The shark fauna of the Upper Cretaceous Hinoshima Formation (Santonian: 86.3–83.6 Ma) of the manuscriptHimenoura Group (Kamiamakusa, Kumamoto Prefecture, Kyushu, Japan) was investigated based on fossil shark teeth found at five localities: Himedo Park, Kugushima, Wadanohana, Higashiura, and Kotorigoe. A detailed geological survey and taxonomic analysis was undertaken, and the habitat, depositional environment, and associated mollusks of each locality were considered in the context of previous studies. Twenty-one species, 15 genera, 11 families, and 6 orders of fossil sharks are recognized from the localities. This assemblage is more diverse than has previously been reported for Japan, and Lamniformes and Hexanchiformes were abundant. Three categories of shark fauna are recognized: a coastal region (Himedo Park; probably a breeding site), the coast to the open sea (Kugushima and Wadanohana), and bottom-dwelling or near-seafloor fauna (Kugushima, Wadanohana, Higashiura, and Kotorigoe).
    [Show full text]
  • Ecological Impact of the End-Cretaceous Extinction on Lamniform Sharks
    RESEARCH ARTICLE Ecological impact of the end-Cretaceous extinction on lamniform sharks Rachel A. Belben1*, Charlie J. Underwood2, Zerina Johanson1, Richard J. Twitchett1 1 Department of Earth Sciences, Natural History Museum, London, United Kingdom, 2 Department of Earth and Planetary Sciences, Birkbeck, University of London, London, United Kingdom * [email protected] Abstract a1111111111 Lamniform sharks are apex marine predators undergoing dramatic local and regional a1111111111 a1111111111 decline worldwide, with consequences for marine ecosystems that are difficult to predict. a1111111111 Through their long history, lamniform sharks have faced widespread extinction, and under- a1111111111 standing those `natural experiments' may help constrain predictions, placing the current cri- sis in evolutionary context. Here we show, using novel morphometric analyses of fossil shark teeth, that the end-Cretaceous extinction of many sharks had major ecological conse- quences. Post-extinction ecosystems supported lower diversity and disparity of lamniforms, OPEN ACCESS and were dominated by significantly smaller sharks with slimmer, smoother and less robust Citation: Belben RA, Underwood CJ, Johanson Z, teeth. Tooth shape is intimately associated with ecology, feeding and prey type, and by inte- Twitchett RJ (2017) Ecological impact of the end- grating data from extant sharks we show that latest Cretaceous sharks occupied similar Cretaceous extinction on lamniform sharks. PLoS niches to modern lamniforms, implying similar ecosystem structure and function. By com- ONE 12(6): e0178294. https://doi.org/10.1371/ parison, species in the depauperate post-extinction community occupied niches most simi- journal.pone.0178294 lar to those of juvenile sand tigers (Carcharias taurus). Our data show that quantitative tooth Editor: Matt Friedman, University of Michigan, morphometrics can distinguish lamniform sharks due to dietary differences, providing critical UNITED STATES insights into ecological consequences of past extinction episodes.
    [Show full text]
  • Table S1.Xlsx
    Bone type Bone type Taxonomy Order/series Family Valid binomial Outdated binomial Notes Reference(s) (skeletal bone) (scales) Actinopterygii Incertae sedis Incertae sedis Incertae sedis †Birgeria stensioei cellular this study †Birgeria groenlandica cellular Ørvig, 1978 †Eurynotus crenatus cellular Goodrich, 1907; Schultze, 2016 †Mimipiscis toombsi †Mimia toombsi cellular Richter & Smith, 1995 †Moythomasia sp. cellular cellular Sire et al., 2009; Schultze, 2016 †Cheirolepidiformes †Cheirolepididae †Cheirolepis canadensis cellular cellular Goodrich, 1907; Sire et al., 2009; Zylberberg et al., 2016; Meunier et al. 2018a; this study Cladistia Polypteriformes Polypteridae †Bawitius sp. cellular Meunier et al., 2016 †Dajetella sudamericana cellular cellular Gayet & Meunier, 1992 Erpetoichthys calabaricus Calamoichthys sp. cellular Moss, 1961a; this study †Pollia suarezi cellular cellular Meunier & Gayet, 1996 Polypterus bichir cellular cellular Kölliker, 1859; Stéphan, 1900; Goodrich, 1907; Ørvig, 1978 Polypterus delhezi cellular this study Polypterus ornatipinnis cellular Totland et al., 2011 Polypterus senegalus cellular Sire et al., 2009 Polypterus sp. cellular Moss, 1961a †Scanilepis sp. cellular Sire et al., 2009 †Scanilepis dubia cellular cellular Ørvig, 1978 †Saurichthyiformes †Saurichthyidae †Saurichthys sp. cellular Scheyer et al., 2014 Chondrostei †Chondrosteiformes †Chondrosteidae †Chondrosteus acipenseroides cellular this study Acipenseriformes Acipenseridae Acipenser baerii cellular Leprévost et al., 2017 Acipenser gueldenstaedtii
    [Show full text]
  • Congressional Record—House H8792
    H8792 CONGRESSIONAL RECORD — HOUSE December 21, 2010 The Shark Conservation Act would end the The SPEAKER pro tempore. The revolving loans, as determined by the Adminis- practice of shark finning in U.S. waters. question is on the motion offered by trator, on a competitive basis, to eligible entities, However, domestic protections alone will not the gentlewoman from Guam (Ms. including through contracts entered into under save sharks. subsection (e) of this section,’’; and BORDALLO) that the House suspend the (B) in paragraph (1), by striking ‘‘tons of’’; We need further safeguards to keep marine rules and concur in the Senate amend- (3) in subsection (b)— ecosystems and top predator populations ment to the bill, H.R. 81. (A) by striking paragraph (2); healthy. The Shark Conservation Act will bol- The question was taken; and (two- (B) by redesignating paragraph (3) as para- ster the U.S.’s position when negotiating for thirds being in the affirmative) the graph (2); and increased international fishery protections. rules were suspended and the Senate (C) in paragraph (2) (as so redesignated)— (i) in subparagraph (A), in the matter pre- Healthy shark populations in our waters can amendment was concurred in. help drive our economy and make our seas ceding clause (i), by striking ‘‘90’’ and inserting A motion to reconsider was laid on ‘‘95’’; thrive. the table. This bill is not just about preserving a spe- (ii) in subparagraph (B)(i), by striking ‘‘10 f percent’’ and inserting ‘‘5 percent’’; and cies, but about preserving an ecosystem, an (iii) in subparagraph (B)(ii), by striking ‘‘the economy, and a sustainable future.
    [Show full text]
  • Redalyc.Taxonomic Review and Phylogenetic Analysis Of
    Anais da Academia Brasileira de Ciências ISSN: 0001-3765 [email protected] Academia Brasileira de Ciências Brasil SILVA, HILDA M.A.; GALLO, VALÉRIA Taxonomic review and phylogenetic analysis of Enchodontoidei (Teleostei: Aulopiformes) Anais da Academia Brasileira de Ciências, vol. 83, núm. 2, enero-junio, 2011, pp. 483-511 Academia Brasileira de Ciências Rio de Janeiro, Brasil Available in: http://www.redalyc.org/articulo.oa?id=32719267009 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative “main” — 2011/5/11 — 19:20 — page 483 — #1 Anais da Academia Brasileira de Ciências (2011) 83(2): 483-511 (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 www.scielo.br/aabc Taxonomic review and phylogenetic analysis of Enchodontoidei (Teleostei: Aulopiformes) HILDA M.A. SILVA and VALÉRIA GALLO Laboratório de Sistemática e Biogeografia, Departamento de Zoologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Maracanã, 20550-013 Rio de Janeiro, RJ, Brasil Manuscript received on September 24, 2010; accepted for publication on December 22, 2010 ABSTRACT Enchodontoidei are extinct marine teleost fishes with a long temporal range and a wide geographic distribution. As there has been no comprehensive phylogenetic study of this taxon, we performed a parsimony analysis using a data matrix with 87 characters, 31 terminal taxa for ingroup, and three taxa for outgroup. The analysis produced 93 equally parsimonious trees (L = 437 steps; CI = 0.24; RI = 0.49).
    [Show full text]
  • Comissão Organizadora
    ISSN 2175-7720 Paleontologia 2 Livro de Resumos ISSN 2175-7720 Paleontologia 3 Livro de Resumos Comitê Editorial: Valéria Gallo Hilda Maria Andrade da Silva Capa e Identidade Visual: Mapinguari Design Projeto gráfico interno e editoração: Rafael Fernandes Lopes da Silva XXI Congresso Brasileiro de Paleontologia: A paleontologia e os eventos globais. 2009, Belém, Pará, Brasil. ISSN: 2175-7720 1. Paleontologia 2. Geociências 3. Congresso Brasileiro de Paleontologia Paleontologia 4 Sobre a Logomarca A Logomarca do XXI Congresso Brasileiro de Paleontologia O gênero Orthaulax é um representante extinto da família Strombidae, endêmico da província paleobiogeográfica Caribeana, vivente entre o Oligoceno Superior e o Mioceno Inferior. Do ponto de vista paleoambiental teria vivido em ambiente marinho de águas rasas, quentes, límpidas, agitadas e com salinidade normal. O processo envolvente da sua ultima volta tornou a concha bastante sólida e maciça, permitindo que habitasse ambiente de grande agitação, como os biohermas, pequenas edificações recifais. Na Formação Pirabas, a espécie Orthaulax pugnax (Heilprin, 1887) foi reconhecida por Maury (1925), e corroborada em pesquisas subseqüentes. Estudos realizados por Cândido Simões Ferreira, delimitaram nos calcários aflorantes no litoral nordeste do Estado do Pará e noroeste do Estado do Maranhão, uma zona caracterizada por elementos estenobiônticos, típicos de recifes de corais. A espécie O. pugnax, associada com algas coralíneas, corais hermatípicos e equinóides regulares são as formas mais características que contribuíram para a edificação do bioherma. Assim, este gastrópode constitui-se em um elemento importante da Formação Pirabas, por ter sido o primeiro táxon utilizado para datar esta unidade litoestratigráfica como oligo-miocênica, bem como seu decisivo papel para correlação com outras unidades sincrônicas da Província Biogeográfica Caribeana, permitindo delimitar no norte do Brasil, a sua extremidade sul.
    [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]
  • The Cretaceous System in Central Sierra County, New Mexico
    The Cretaceous System in central Sierra County, New Mexico Spencer G. Lucas, New Mexico Museum of Natural History, Albuquerque, NM 87104, [email protected] W. John Nelson, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Karl Krainer, Institute of Geology, Innsbruck University, Innsbruck, A-6020 Austria, [email protected] Scott D. Elrick, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Abstract (part of the Dakota Formation, Campana (Fig. 1). This is the most extensive outcrop Member of the Tres Hermanos Formation, area of Cretaceous rocks in southern New Upper Cretaceous sedimentary rocks are Flying Eagle Canyon Formation, Ash Canyon Mexico, and the exposed Cretaceous sec- Formation, and the entire McRae Group). A exposed in central Sierra County, southern tion is very thick, at about 2.5 km. First comprehensive understanding of the Cretaceous New Mexico, in the Fra Cristobal Mountains, recognized in 1860, these Cretaceous Caballo Mountains and in the topographically strata in Sierra County allows a more detailed inter- pretation of local geologic events in the context strata have been the subject of diverse, but low Cutter sag between the two ranges. The ~2.5 generally restricted, studies for more than km thick Cretaceous section is assigned to the of broad, transgressive-regressive (T-R) cycles of 150 years. (ascending order) Dakota Formation (locally deposition in the Western Interior Seaway, and includes the Oak Canyon [?] and Paguate also in terms of Laramide orogenic
    [Show full text]
  • Highly Diversified Late Cretaceous Fish Assemblage Revealed by Otoliths (Ripley Formation and Owl Creek Formation, Northeast Mississippi, Usa)
    Rivista Italiana di Paleontologia e Stratigrafia (Research in Paleontology and Stratigraphy) vol. 126(1): 111-155. March 2020 HIGHLY DIVERSIFIED LATE CRETACEOUS FISH ASSEMBLAGE REVEALED BY OTOLITHS (RIPLEY FORMATION AND OWL CREEK FORMATION, NORTHEAST MISSISSIPPI, USA) GARY L. STRINGER1, WERNER SCHWARZHANS*2 , GEORGE PHILLIPS3 & ROGER LAMBERT4 1Museum of Natural History, University of Louisiana at Monroe, Monroe, Louisiana 71209, USA. E-mail: [email protected] 2Natural History Museum of Denmark, Zoological Museum, Universitetsparken 15, DK-2100, Copenhagen, Denmark. E-mail: [email protected] 3Mississippi Museum of Natural Science, 2148 Riverside Drive, Jackson, Mississippi 39202, USA. E-mail: [email protected] 4North Mississippi Gem and Mineral Society, 1817 CR 700, Corinth, Mississippi, 38834, USA. E-mail: [email protected] *Corresponding author To cite this article: Stringer G.L., Schwarzhans W., Phillips G. & Lambert R. (2020) - Highly diversified Late Cretaceous fish assemblage revealed by otoliths (Ripley Formation and Owl Creek Formation, Northeast Mississippi, USA). Riv. It. Paleontol. Strat., 126(1): 111-155. Keywords: Beryciformes; Holocentriformes; Aulopiformes; otolith; evolutionary implications; paleoecology. Abstract. Bulk sampling and extensive, systematic surface collecting of the Coon Creek Member of the Ripley Formation (early Maastrichtian) at the Blue Springs locality and primarily bulk sampling of the Owl Creek Formation (late Maastrichtian) at the Owl Creek type locality, both in northeast Mississippi, USA, have produced the largest and most highly diversified actinopterygian otolith (ear stone) assemblage described from the Mesozoic of North America. The 3,802 otoliths represent 30 taxa of bony fishes representing at least 22 families. In addition, there were two different morphological types of lapilli, which were not identifiable to species level.
    [Show full text]