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CONODONT BIOSTRATIGRAPHY and ... -.: Palaeontologia Polonica
CONODONT BIOSTRATIGRAPHY AND PALEOECOLOGY OF THE PERTH LIMESTONE MEMBER, STAUNTON FORMATION (PENNSYLVANIAN) OF THE ILLINOIS BASIN, U.S.A. CARl B. REXROAD. lEWIS M. BROWN. JOE DEVERA. and REBECCA J. SUMAN Rexroad , c.. Brown . L.. Devera, 1.. and Suman, R. 1998. Conodont biostrati graph y and paleoec ology of the Perth Limestone Member. Staunt on Form ation (Pennsy lvanian) of the Illinois Basin. U.S.A. Ill: H. Szaniawski (ed .), Proceedings of the Sixth European Conodont Symposium (ECOS VI). - Palaeont ologia Polonica, 58 . 247-259. Th e Perth Limestone Member of the Staunton Formation in the southeastern part of the Illinois Basin co nsists ofargill aceous limestone s that are in a facies relati on ship with shales and sandstones that commonly are ca lcareous and fossiliferous. Th e Perth conodo nts are do minated by Idiognathodus incurvus. Hindeodus minutus and Neognathodu s bothrops eac h comprises slightly less than 10% of the fauna. Th e other spec ies are minor consti tuents. The Perth is ass igned to the Neog nathodus bothrops- N. bassleri Sub zon e of the N. bothrops Zo ne. but we were unable to co nfirm its assignment to earliest Desmoin esian as oppose d to latest Atokan. Co nodo nt biofacies associations of the Perth refle ct a shallow near- shore marine environment of generally low to moderate energy. but locali zed areas are more variable. particul ar ly in regard to salinity. K e y w o r d s : Co nodo nta. biozonation. paleoecology. Desmoinesian , Penn sylvanian. Illinois Basin. U.S.A. -
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~........................................... -
Early Silurian Oceanic Episodes and Events
Journal of the Geological Society, London, Vol. 150, 1993, pp. 501-513, 3 figs. Printed in Northern Ireland Early Silurian oceanic episodes and events R. J. ALDRIDGE l, L. JEPPSSON 2 & K. J. DORNING 3 1Department of Geology, The University, Leicester LE1 7RH, UK 2Department of Historical Geology and Palaeontology, SiSlvegatan 13, S-223 62 Lund, Sweden 3pallab Research, 58 Robertson Road, Sheffield $6 5DX, UK Abstract: Biotic cycles in the early Silurian correlate broadly with postulated sea-level changes, but are better explained by a model that involves episodic changes in oceanic state. Primo episodes were characterized by cool high-latitude climates, cold oceanic bottom waters, and high nutrient supply which supported abundant and diverse planktonic communities. Secundo episodes were characterized by warmer high-latitude climates, salinity-dense oceanic bottom waters, low diversity planktonic communities, and carbonate formation in shallow waters. Extinction events occurred between primo and secundo episodes, with stepwise extinctions of taxa reflecting fluctuating conditions during the transition period. The pattern of turnover shown by conodont faunas, together with sedimentological information and data from other fossil groups, permit the identification of two cycles in the Llandovery to earliest Weniock interval. The episodes and events within these cycles are named: the Spirodden Secundo episode, the Jong Primo episode, the Sandvika event, the Malm#ykalven Secundo episode, the Snipklint Primo episode, and the lreviken event. Oceanic and climatic cyclicity is being increasingly semblages (Johnson et al. 1991b, p. 145). Using this recognized in the geological record, and linked to major and approach, they were able to detect four cycles within the minor sedimentological and biotic fluctuations. -
Revised Correlation of Silurian Provincial Series of North America with Global and Regional Chronostratigraphic Units 13 and D Ccarb Chemostratigraphy
Revised correlation of Silurian Provincial Series of North America with global and regional chronostratigraphic units 13 and d Ccarb chemostratigraphy BRADLEY D. CRAMER, CARLTON E. BRETT, MICHAEL J. MELCHIN, PEEP MA¨ NNIK, MARK A. KLEFF- NER, PATRICK I. MCLAUGHLIN, DAVID K. LOYDELL, AXEL MUNNECKE, LENNART JEPPSSON, CARLO CORRADINI, FRANK R. BRUNTON AND MATTHEW R. SALTZMAN Cramer, B.D., Brett, C.E., Melchin, M.J., Ma¨nnik, P., Kleffner, M.A., McLaughlin, P.I., Loydell, D.K., Munnecke, A., Jeppsson, L., Corradini, C., Brunton, F.R. & Saltzman, M.R. 2011: Revised correlation of Silurian Provincial Series of North America with global 13 and regional chronostratigraphic units and d Ccarb chemostratigraphy. Lethaia,Vol.44, pp. 185–202. Recent revisions to the biostratigraphic and chronostratigraphic assignment of strata from the type area of the Niagaran Provincial Series (a regional chronostratigraphic unit) have demonstrated the need to revise the chronostratigraphic correlation of the Silurian System of North America. Recently, the working group to restudy the base of the Wen- lock Series has developed an extremely high-resolution global chronostratigraphy for the Telychian and Sheinwoodian stages by integrating graptolite and conodont biostratigra- 13 phy with carbonate carbon isotope (d Ccarb) chemostratigraphy. This improved global chronostratigraphy has required such significant chronostratigraphic revisions to the North American succession that much of the Silurian System in North America is cur- rently in a state of flux and needs further refinement. This report serves as an update of the progress on recalibrating the global chronostratigraphic correlation of North Ameri- can Provincial Series and Stage boundaries in their type area. -
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. -
Catalog of Type Specimens of Invertebrate Fossils: Cono- Donta
% {I V 0> % rF h y Catalog of Type Specimens Compiled Frederick J. Collier of Invertebrate Fossils: Conodonta SMITHSONIAN CONTRIBUTIONS TO PALEOBIOLOGY NUMBER 9 SERIAL PUBLICATIONS OF THE SMITHSONIAN INSTITUTION The emphasis upon publications as a means of diffusing knowledge was expressed by the first Secretary of the Smithsonian Institution. In his formal plan for the Insti tution, Joseph Henry articulated a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This keynote of basic research has been adhered to over the years in the issuance of thousands of titles in serial publications under the Smithsonian imprint, com mencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: Smithsonian Annals of Flight Smithsonian Contributions to Anthropology Smithsonian Contributions to Astrophysics Smithsonian Contributions to Botany Smithsonian Contributions to the Earth Sciences Smithsonian Contributions to Paleobiology Smithsonian Contributions to Zoology Smithsonian Studies in History and Technology In these series, the Institution publishes original articles and monographs dealing with the research and collections of its several museums and offices and of profes sional colleagues at other institutions of learning. These papers report newly acquired facts, synoptic interpretations of data, or original theory in specialized fields. These publications are distributed by mailing lists to libraries, laboratories, and other in terested institutions and specialists throughout the world. Individual copies may be obtained from the Smithsonian Institution Press as long as stocks are available. -
40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor
40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor To cite this version: Jonathan Gaylor. 40Ar/39Ar Dating of the Late Cretaceous. Earth Sciences. Université Paris Sud - Paris XI, 2013. English. NNT : 2013PA112124. tel-01017165 HAL Id: tel-01017165 https://tel.archives-ouvertes.fr/tel-01017165 Submitted on 2 Jul 2014 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Université Paris Sud 11 UFR des Sciences d’Orsay École Doctorale 534 MIPEGE, Laboratoire IDES Sciences de la Terre 40Ar/39Ar Dating of the Late Cretaceous Thèse de Doctorat Présentée et soutenue publiquement par Jonathan GAYLOR Le 11 juillet 2013 devant le jury compose de: Directeur de thèse: Xavier Quidelleur, Professeur, Université Paris Sud (France) Rapporteurs: Sarah Sherlock, Senoir Researcher, Open University (Grande-Bretagne) Bruno Galbrun, DR CNRS, Université Pierre et Marie Curie (France) Examinateurs: Klaudia Kuiper, Researcher, Vrije Universiteit Amsterdam (Pays-Bas) Maurice Pagel, Professeur, Université Paris Sud (France) - 2 - - 3 - Acknowledgements I would like to begin by thanking my supervisor Xavier Quidelleur without whom I would not have finished, with special thanks on the endless encouragement and patience, all the way through my PhD! Thank you all at GTSnext, especially to the directors Klaudia Kuiper, Jan Wijbrans and Frits Hilgen for creating such a great project. -
The Planktonic Foraminifera of the Jurassic. Part III: Annotated Historical Review and References
Swiss J Palaeontol (2017) 136:273–285 DOI 10.1007/s13358-017-0130-0 The planktonic foraminifera of the Jurassic. Part III: annotated historical review and references Felix M. Gradstein1,2 Received: 21 February 2017 / Accepted: 3 April 2017 / Published online: 7 July 2017 Ó Akademie der Naturwissenschaften Schweiz (SCNAT) 2017 Abstract Over 70 publications on Jurassic planktonic With few exceptions, Jurassic planktonic foraminifera foraminifera, particularly by East and West European and publications based on thin-sections are not covered in this Canadian micropalaeontologists, are summarized and review. Emphasis is only on thin-section studies that had briefly annotated. It provides an annotated historic over- impact on our understanding of Jurassic planktonic for- view for this poorly understood group of microfossils, aminifera. By the same token, microfossil casts do not going back to 1881 when Haeusler described Globigerina allow study of the taxonomically important wall structure helvetojurassica from the Birmenstorfer Schichten of and sculpture; reference to such studies is limited to few of Oxfordian age in Canton Aargau, Switzerland. historic interest. The first four, presumably planktonic foraminiferal spe- Keywords Jurassic Á Planktonic foraminifera Á Annotated cies from Jurassic strata, were described in the second half of historical review 1881–2015 the nineteenth century: Globigerina liasina from the Middle Lias of France (Terquem and Berthelin 1875), G. helveto- jurassica from the Early Oxfordian of Switzerland (Haeusler Annotated historical overview 1881, 1890) and G. oolithica and G. lobata from the Bajocian of France (Terquem 1883). Some descriptions were from Jurassic planktonic foraminifera have been studied since the internal moulds. It was not until 1958 (see below) that more second half of the nineteen’s century, but it was not until after attention was focused on the occurrences of early planktonic the Second World War that micropalaeontological studies foraminifera, with emphasis on free specimens. -
Upper Cretaceous Stratigraphy and Biostratigraphy of South-Central New Mexico Stephen C
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/63 Upper Cretaceous stratigraphy and biostratigraphy of south-central New Mexico Stephen C. Hook, Greg H. Mack, and William A. Cobban, 2012, pp. 413-430 in: Geology of the Warm Springs Region, Lucas, Spencer G.; McLemore, Virginia T.; Lueth, Virgil W.; Spielmann, Justin A.; Krainer, Karl, New Mexico Geological Society 63rd Annual Fall Field Conference Guidebook, 580 p. This is one of many related papers that were included in the 2012 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. -
Planktonic Foraminifera) from the Middle- Upper Eocene of Jabal Hafit, United Arab Emirates
Open access e-Journal Earth Science India eISSN: 0974 – 8350 Vol. 11 (II), April, 2018, pp. 122 - 132 http://www.earthscienceindia.info/ Hantkeninidae (Planktonic Foraminifera) from the Middle- Upper Eocene of Jabal Hafit, United Arab Emirates Haidar Salim Anan Gaza P. O. Box 1126, Palestine Email: [email protected] ABSTRACT Six species of the planktonic foraminiferal Family Hantkeninidae belonging to the genera namely Cribrohantkenina and Hantkenina are recorded and described from the Middle- and Upper Eocene succession of Jabal Hafit, Al Ain area, United Arab Emirates. The species include Cribrohantkenina inflata, Hantkenina alabamensis, H. compressa, H. australis, H. liebusi and H. primitiva. The three species of Hantkenina named last are recorded for the first time from the UAE. Keywords: Middle Eocene, Upper Eocene, Hantkeninidae species, United Arab Emirates INTRODUCTION The species of the genera Cribrohantkenina and Hantkenina have a worldwide distribution encircling low and mid-latitudes. The appearance of the genus Hantkenina at 49 Ma corresponds with the Early/Middle Eocene boundary, and their extinction at 33.7 Ma denotes the Eocene/Oligocene boundary, while the genus Cribrohantkenina appears only at the Late Eocene (36. 4 Ma-34. 3 Ma) and its extinction denotes the Eocene/Oligocene boundary. Pearson (1993) noted that the genus Hantkenina have a rounded periphery and more globose chambers (e.g. H. alabamensis) and sometimes areal apertures on the chamber face around the primer aperture (=Cribrohantkenina). Coxall et al. (2003); Coxall and Pearson (2006); and Rögl and Egger (2010) noted that the genus Hantkenina evolved gradually from the genus Clavigerinella in the earliest Middle Eocene, contrary to the long- held view that it is related to the genus Pseudohastigerina evolved from Globanomalina luxorensis (Nakkady) in the earliest Early Eocene (base of Zone E2) by the development of a symmetrical umbilical aperture and slightly asymmetrical to fully planispiral test as are the result of changes in the timing of the development processes. -
Reconstruction of the Multielement Apparatus of the Earliest Triassic Conodont, Hindeodus Parvus, Using Synchrotron Radiation X-Ray Micro-Tomography
Journal of Paleontology, 91(6), 2017, p. 1220–1227 Copyright © 2017, The Paleontological Society 0022-3360/17/0088-0906 doi: 10.1017/jpa.2017.61 Reconstruction of the multielement apparatus of the earliest Triassic conodont, Hindeodus parvus, using synchrotron radiation X-ray micro-tomography Sachiko Agematsu,1 Kentaro Uesugi,2 Hiroyoshi Sano,3 and Katsuo Sashida4 1Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan 〈[email protected]〉 2Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo 679-5198, Japan 〈[email protected]〉 3Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan 〈[email protected]〉 4Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan 〈[email protected]〉 Abstract.—Earliest Triassic natural conodont assemblages preserved as impressions on bedding planes occur in a claystone of the Hashikadani Formation, which is part of the Mino Terrane, a Jurassic accretionary complex in Japan. In this study, the apparatus of Hindeodus parvus (Kozur and Pjatakova, 1976) is reconstructed using synchrotron radiation micro-tomography (SR–μCT). This species has six kinds of elements disposed in 15 positions forming the conodont apparatus. Carminiscaphate, angulate, and makellate forms are settled in pairs in the P1,P2, and M posi- tions, respectively. The single alate element is correlated with the S0 position. The S array is a cluster of eight rami- forms, subdivided into two inner pairs of digyrate S1–2 and two outer pairs of bipennate S3–4 elements. The reconstruction is similar to a well-known ozarkodinid apparatus model. -
The Turonian - Coniacian Boundary in the United States Western Interior
Acta Geologica Polonica, Vol. 48 (1998), No.4, pp. 495-507 The Turonian - Coniacian boundary in the United States Western Interior IRENEUSZ WALASZCZYKI & WILLIAM A. COBBAN2 I Institute of Geology, University of Warsaw, AI. Zwirki i Wigury 93, PL-02-089 Warszawa, Poland E-mail: [email protected] 270 Estes Street, Lakewood, Colorado 80226, USA ABSTRACT: WALASZCZYK, I. & COBBAN, W.A. 1998. The Turonian - Coniacian boundary in the United States Western Interior. Acta Geologica Polonica, 48 (4),495-507. Warszawa. The Turonian/Coniacian boundary succession in the United States Western Interior is characterized by the same inoceramid faunas as recognized in Europe, allowing the application of the same zonal scheme in both regions; Mytiloides scupini and Cremnoceramus waltersdorfensis waltersdorfensis zones in the topmost Turonian and Cremnoceramus deformis erectus Zone in the lowermost Coniacian. The correla tion with Europe is enhanced, moreover, by a set of boundary events recognized originally in Europe and well represented in the Western Interior: Didymotis I Event and waltersdorfensis Event in the topmost Turonian, and erectus I, II and ?III events in the Lower Coniacian. First "Coniacian" ammonite, Forresteria peruana, appears in the indisputable Turonian, in the zone of M. scupini, and the reference to Forresteria in the boundary definition should be rejected. None of the North American sections, pro posed during the Brussels Symposium as the potential boundary stratotypes, i.e. Wagon Mound and Pueblo sections, appears better than the voted section of the Salzgitter-Salder. The Pueblo section is relatively complete but markedly condensed in comparison with the German one, but it may be used as a very convenient reference section for the Turonian/Coniacian boundary in the Western Interior.