Towards a Consistent Oxfordian-Kimmeridgian Global
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Or Early Callovian) Ammonites from Alaska and Montana
Jurassic (Bathonian or Early Callovian) Ammonites From Alaska and Montana By RALPH W. IMLAY SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 374-C Descr$tions and illustrations of ctphalopods of possible late Middle Jurasric (Bathonian) age UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1962 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.C. CONTENTS Page Page C- 1 Age of the faunas-Continued C- 1 Callovian versus Bathonian in Greenland- - - - _ - - _ - - C-2 Callovian versus Bathonian in Alaska and Montana- -- - Stratigraphic summary- __ --______ _ - - - -- - ---.- -- -.- - - C-2 Paleogeographic considerations- - -_-- -- ---- ---- Cook Inlet region, Alaska -______--------.-.--..--c-2 Summation of the evidence- - - _._ _ - _ _ - - - - - - - - - - - - Iniskin Peninsula-_-_______----.--------~.--C-2 Comparisons with other faunas---------___----------- Peninsula north of Chinitna Bay----- __._ _ _._ - C-3 \Vestern interior of Canada- - - -- -- -____------- --- Talkeetna Mountains ----___-_ - - -- ---- - - -- - -- C-3 Arctic region-_-_---___-_----------------------- Western Montana- - -----__-----------------.---C-5 other regions--__-__-____----------------------- Rocky Mountain front north of the Sun River- (2-5 Geographic distribution ___-___ --- - ---------- ------ -- - Drummond area--- ---_____ _--- -- -.-- ---- -- - C-10 Summary of results- --_-____-_----_---_-_----------- Age ofthe faunas-----------_----------------------- GI0 Systematic descriptions--_ _ _ - _ - - - - - - - - - - - - - - - - - - - - - - - Evidence from Alaska---____________--------------C-10 Literature cited _-_-_---______----------------------- Evidence from Montana --_-_____ --- - - -- .--- --- - - C-12 Index---__--___-_-_------------------------------- ILLUSTRATIONS [Plates 1-3 follow index] PLATE 1. Holcophylloceras, Oecotraustes (Paroecotraustes) ?, and Arctocephalites (Cranocephalites). 2. -
Post-Carboniferous Stratigraphy, Northeastern Alaska by R
Post-Carboniferous Stratigraphy, Northeastern Alaska By R. L. DETTERMAN, H. N. REISER, W. P. BROSGE,and]. T. DUTRO,JR. GEOLOGICAL SURVEY PROFESSIONAL PAPER 886 Sedirnentary rocks of Permian to Quaternary age are named, described, and correlated with standard stratigraphic sequences UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1975 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress Cataloging in Publication Data Detterman, Robert L. Post-Carboniferous stratigraphy, northeastern Alaska. (Geological Survey Professional Paper 886) Bibliography: p. 45-46. Supt. of Docs. No.: I 19.16:886 1. Geology-Alaska. I. Detterman, Robert L. II. Series: United States. Geological Survey. Professional Paper 886. QE84.N74P67 551.7'6'09798 74-28084 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-02687-2 CONTENTS Page Page Abstract __ _ _ _ _ __ __ _ _ _ _ _ _ _ _ _ _ _ _ __ __ _ _ _ _ _ _ __ __ _ _ __ __ __ _ _ _ _ __ 1 Stratigraphy__:_Continued Introduction __________ ----------____ ----------------____ __ 1 Kingak Shale ---------------------------------------- 18 Purpose and scope ----------------------~------------- 1 Ignek Formation (abandoned) -------------------------- 20 Geographic setting ------------------------------------ 1 Okpikruak Formation (geographically restricted) ________ 21 Previous work and acknowledgments ------------------ 1 Kongakut Formation ---------------------------------- -
The Middle Jurassic of Western and Northern Europe: Its Subdivisions, Geochronology and Correlations
The Middle Jurassic of western and northern Europe: its subdivisions, geochronology and correlations John H. Callomon The palaeogeographic settings of Denmark and East Greenland during the Middle Jurassic are outlined. They lay in the widespread epicontinental seas that covered much of Europe in the post-Triassic transgression. It was a period of continuing eustatic sea-level rise, with only distant connections to world oceans: to the Pacific, via the narrow Viking Straits between Greenland and Norway and hence the arctic Boreal Sea to the north; and to the subtropical Tethys, via some 1200 km of shelf-seas to the south. The sedimentary history of the region was strongly influenced by two factors: tectonism and climate. Two modes of tectonic movement governed basinal evolution: crustal extension lead- ing to subsidence through rifting, such as in the Viking and Central Grabens of the North Sea; and subcrustal thermal upwelling, leading to domal uplift and the partition of marine basins through emergent physical barriers, as exemplified by the Central North Sea Dome with its associated volcanics. The climatic gradient across the 30º of temperate latitude spanned by the European seas governed biotic diversity and biogeography, finding expression in rock-forming biogenic carbonates that dominate sediments in the south and give way to largely siliciclastic sediments in the north. Geochronology of unrivalled finesse is provided by standard chronostratigraphy based on the biostratigraphy of ammonites. The Middle Jurassic saw the onset of considerable bioprovincial endemisms in these guide-fossils, making it necessary to construct parallel standard zonations for Boreal, Subboreal or NW European and Submediterranean Provinces, of which the NW European zonation provides the primary international standard. -
THE FREE WESSEX ARTS and CULTURE GUIDE EVOLVER May and June 2019 EVOLVER 111:Layout 1 23/04/2019 18:50 Page 2
EVOLVER_111:Layout 1 23/04/2019 18:49 Page 1 THE FREE WESSEX ARTS AND CULTURE GUIDE EVOLVER May and June 2019 EVOLVER_111:Layout 1 23/04/2019 18:50 Page 2 2 EVOLVER_111:Layout 1 23/04/2019 18:50 Page 3 EVOLVER 111 EXHIBIT A ZARA MCQUEEN: ‘AS THE CROW FLIES’ Mixed media (120 x 150 cm) ARTIST’S STATEMENT: “Drawing and painting is part of who I am. It is how I respond to my world. I am driven by mood and intuition. I always begin outside. In that sense I am a landscape painter. Seasonal changes catch my attention and I can rarely resist the changing colours and textures of the natural year. I sketch and paint in watercolour, charcoal or oil then return to the studio where I make larger mixed media pieces guided by memory and feeling. Work gets cut down, torn up, collaged and reformed. Fragments of self portraits often lay hidden in fields, branches or buildings.” ‘DRAWN IN’ 11 May - 15 June: Bridport Arts Centre, South Street, BRIDPORT, DT6 3NR. Tuesday - Saturday 10am - 4pm. 01308 424204 / bridport-arts.com. zara-mcqueen.co.uk EVOLVER Email [email protected] THE WESSEX ARTS AND CULTURE GUIDE Telephone 01935 808441 Editor SIMON BARBER Website evolver.org.uk Assisted by SUZY RUSHBROOK Instagram evolvermagazine Evolver Writer Twitter @SimonEvolver FIONA ROBINSON www.fionarobinson.com Facebook facebook.com/EvolverMagazine Graphic Design SIMON BARBER Published by EVOLVER MEDIA LIMITED Website OLIVER CONINGHAM at AZTEC MEDIA Pre-Press by FLAYDEMOUSE Front Cover 01935 479453 / flaydemouse.com JEREMY GARDINER: ‘WEST BAY IV’ Printed by STEPHENS & GEORGE (Painting) Distributed by ACOUSTIC See page 4. -
Weymouth Harbour
Weymouth Harbour Guide2020 Welcome 4 3 Navigation, Berthing & Facilities 5 Harbour Team 5 Welcome / Willkommen / Welkom / Bienvenue Welkom / Willkommen / Welcome Annual Berthing 6 Contentso aid navigation of this guide, please refer to the Visitor Berths 7 colour-coded bars to the right of each page and Town Centre Location Town Map 8 match with the coloured sections shown to the right. T Harbour Facilities 9 Price List 10 Annual Offers & Incentives 11 Berthing Entering & Leaving the Harbour 12 Harbour Outer Harbour Berthing Chart 13 Master’s Offi ce Weymouth Watersports Access Zones 14 Safety 16 RNLI 16 Lulworth Ranges 17 Visitor Weymouth 18 Moorings Blue Flag Beach Things to See & Do 18 Local Festivals and Events 2020 20 Published for and on behalf of Dorset Council by: Dorset Seafood Festival 21 Resort Marketing Ltd Time to Shop 22 St Nicholas House, 3 St Nicholas Street, Time to Eat 22 Weymouth, Dorset DT4 8AD Weymouth on the Water 24 Weymouth’s Town Bridge 26 Tel: 01305 770111 | Fax: 01305 770444 | www.resortuk.com Explore Dorset 28 Tidal stream data and tide tables on pages 35-45 reproduced by permission of the Controller of Her Majesty’s Stationery Offi ce and the UK Hydrographic Offi ce Portland Bill & Portland Races 28 (www.ukho.gov.uk). © Crown Copyright. The Jurassic Coast 30 No liability can be accepted by Dorset Council or the publisher for the consequences of any Heading West 32 inaccuracies. The master of any vessel is solely responsible for its safe navigation. All artwork and editorial is copyright and may not be reproduced without prior permission. -
Report of the Meeting of the Kimmeridgian Working Group
Volumina Jurassica, 2015, Xiii (2): 153–158 Report of the Meeting of the Kimmeridgian Working Group Andrzej WIERZBOWSKI1 Convenor of the Kimmeridgian W.G. The Kimmeridgian Working Group Meeting organized under auspices of the International Subcomission on Ju- rassic Stratigraphy took place in Poland between 18 and 21 May 2015 at the Polish Geological Institute – National Research Institute in Warsaw, with a one and a half day excursion to the Jurassic outcrops in the Wieluń Upland (Polish Jura). It was arranged to discuss new advances in recognition of a unique base of the Kimmeridgian Stage, the Oxfordian/Kimmeridgian boundary since 2006 when the first proposal for the GSSP was made (see Wierzbowski et al., 2006). Fifteen researchers were present, mainly members of the Kimmeridgian Working Group: C. D’Arpa (Geological Museum, University of Palermo), M. Barski (Geological Faculty, University of Warsaw), E. Głowniak (Geological Faculty, University of Warsaw), J. Grabowski (Polish Geological Institute – NRI), S. Hesselbo (University of Exeter, chairmen of ISJS), M. Hodbod (Polish Geological Institute – NRI), B. Matyja (Geological Faculty, University of War- saw), A. Mironenko (Russia), N. Morton (former ISJS chairman, France), M. Rogov (Geological Institute, Russian Academy of Science, Moscow), G. Schweigert (Staatliches Museum, Stuttgart), J. Smoleń (Polish Geological Institute – NRI), K. Sobień (Polish Geological Institute – NRI), A. Wierzbowski (Polish Geological Institute – NRI), H. Wierz bowski (Polish Geological Institute – NRI), J. Wright (Department of Earth Sciences, Royal Holloway, University of London). Twelve presentations were given (including two posters). These included several aspects of the Oxfordian/ Kimmeridgian boundary such as ammonite biostratigraphy, dinoflagellate cyst biostratigraphy, magnetostratigraphy, geochemistry (both carbon and oxygen records as well as other geochemical data along with geochemical studies which enable the recognition of the paleoenvironmental changes in the succession). -
First Three-Dimensionally Preserved in Situ Record of an Aptychophoran Ammonite Jaw Apparatus in the Jurassic and Discussion of the Function of Aptychi
Berliner paläobiologische Abhandlungen 10 321-330 Berlin 2009-11-11 First three-dimensionally preserved in situ record of an aptychophoran ammonite jaw apparatus in the Jurassic and discussion of the function of aptychi Günter Schweigert Abstract: A unique specimen of the microconch ammonite Lingulaticeras planulatum Berckhemer in Ziegler, 1958 comes from a tempestite bed within the Upper Jurassic lithographic limestones of Scham- haupten in Franconia (Painten Formation, uppermost Kimmeridgian). The shell is unique because it retains the complete jaw apparatus in the body chamber. The articulation of the Lamellaptychus and the corresponding upper beak are well preserved. The function of the aptychus is discussed in general, and an operculum function is thought to be unlikely. The formation of strongly calcified aptychi in aspidoceratids and some oppeliid ammonoids is interpreted as an added ballast weight to stabilize the conch for swimming in the water column. Keywords: Ammonites, aptychus, preservation, functional morphology, Upper Jurassic, lithographic lime- stones, Franconia, Germany Zusammenfassung: Ein einzigartig erhaltenes Exemplar des mikroconchen Ammoniten Lingulaticeras planulatum Berckhemer in Ziegler, 1958 aus einer Tempestitlage des oberjurassischen Plattenkalks von Schamhaupten in Franken (Painten-Formation, oberstes Kimmeridgium) enthält noch den vollständigen Kieferapparat in seiner Wohnkammer.Es zeigt die perfekte Artikualation des Lamellaptychus mit dem dazu- gehörenden Oberkiefer. Die Funktion des Aptychus wird allgemein diskutiert und eine Deckelfunktion für unwahrscheinlich gehalten. Die Ausbildung stark verkalkter Aptychen wie in Aspidoceraten und manchen Oppeliiden wird als zusätzliches Tariergewicht gedeutet, um das Gehäuse in starker bewegtem Wasser zu stabilisieren. Schlüsselwörter: Ammoniten, Aptychus, Erhaltung, Plattenkalke, Funktionsmorphologie, Oberjura, Franken, Deutschland Address of the author: Dr. Günter Schweigert, Staatliches Museum für Naturkunde, Rosenstein 1, D-70191 Stuttgart. -
Callovian (Middle Jurassic) Dinoflagellate Cysts from the Algarve Basin, Southern
1 Callovian (Middle Jurassic) dinoflagellate cysts from the Algarve Basin, southern 2 Portugal 3 4 Marisa E.N. Borges a,b, James B. Riding c,*, Paulo Fernandes a, Vasco Matos a, Zélia 5 Pereira b 6 7 a CIMA - Centro de Investigação Marinha e Ambiental, Universidade do Algarve, 8 Campus de Gambelas, 8005-139 Faro, Portugal 9 b LNEG-LGM, Rua da Amieira, 4465-965 S. Mamede Infesta, Portugal 10 c British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham NG12 11 5GG, UK 12 13 * Corresponding author. Tel.: +44(0)115 9363447 14 E-mail addresses: [email protected] (M.E.N. Borges), [email protected] (J.B. 15 Riding), [email protected] (P. Fernandes), [email protected] (V. Matos), 16 [email protected] (Z. Pereira). 17 18 ABSTRACT 19 The palynology of three Callovian (Middle Jurassic) limestone-marl successions from 20 the Algarve Basin in southern Portugal was studied. These localities are Baleeira 21 Harbour, Mareta Beach and Telheiro Quarry; they provide a composite succession, tied 1 22 to ammonite zones, through the Lower, Middle and Upper Callovian from the western 23 and eastern subbasins of the Algarve Basin. The three sections generally yielded 24 relatively abundant marine and continental palynofloras. Diversity is low to moderate 25 and the dinoflagellate cyst associations are dominated by Ctenidodinium spp., the 26 Ellipsoidictyum/Valensiella group, Gonyaulacysta jurassica subsp. adecta, 27 Korystocysta spp., Meiourogonyaulax spp., Pareodinia ceratophora, Sentusidinium 28 spp., Surculosphaeridium? vestitum and Systematophora spp. Some intra-Callovian 29 marker bioevents were recorded; these include the range bases of Ctenidodinium 30 ornatum, Gonyaulacysta eisenackii, Korystocysta pachyderma, Mendicodinium 31 groenlandicum, Rigaudella spp. -
New Data on the Jaw Apparatus of Fossil Cephalopods
New dataon the jaw apparatus of fossil cephalopods YURI D. ZAKHAROV AND TAMAZ A. LOMINADZE \ Zakharov, Yuri D. & Lominadze, Tamaz A. 19830115: New data on the jaw apparatus of fossil LETHAIA cephalopods. Lethaia, Vol. 16, pp. 67-78. Oslo. ISSN 0024-1164. A newly discovered fossil cephalopod jaw apparatus that may belong to Permian representatives of the Endocochlia is described. Permorhynchus dentatus n. gen. n. sp. is established on the basis of this ~ apparatus. The asymmetry of jaws in the Ectocochlia may be connected with the double function of the ventral jaw apparatus, and the well-developed, relatively large frontal plate of the ventral jaw should be regarded as a feature common to all representatives of ectocochlian cephalopods evolved from early Palaeozoic stock. Distinct features seen in the jaw apparatus of Upper Pcrmian cndocochlians include the pronounced beak form of both jaws and the presence of oblong wings on the ventral mandible. o Cephalopoda. jaw. operculum. aptychus, anaptychus, Permorhynchus n.gen.• evolution. Permian. Yuri D. Zakharov llOpllll Ilscumpueeu« Gaxapoe], Institute of Biology and Pedology, Far-Eastern Scientific Centre. USSR Academy of Science, Vladivostok 690022, USSR (EUOJl020-n9~BnlHbliiuucmu my m Ilaot.neeocmo-cnoro Ha."~H020 uenmpav Axaoeuuu 'HayK CCCP, Bnaoueocmo« 690022, CCCP); Tamaz A. Lominadze ITa.'W3 Apl.j1L10BUl.j Jlouunaoee), Institute of Palaeobiology of Georgian SSR Academy of Science. Tbilisi 380004. USSR (Hncmumvm naJle06UOJl02UU Atcaoeuuu naytc TpY3UHUjKOii CCP. T6'LJUCU 380004. CCP; 19th August. 1980 (revised 1982 06 28). The jaw apparatus of Recent cephalopods is re Turek 1978, Fig. 7, but not the reconstruction in presented by two jaw elements (Fig. -
Expanded Jurassic Timescale
TimeScale Creator 2012 chart Russian and Ural regional units Russia Platform regional units Calca Jur-Cret boundary regional Russia Platform East Asian regional units reous stages - British and Boreal Stages (Jur- Australia and New Zealand regional units Marine Macrofossils Nann Standard Chronostratigraphy British regional Boreal regional Cret, Perm- Japan New Zealand Chronostratigraphy Geomagnetic (Mesozoic-Paleozoic) ofossil stages stages Carb & South China (Neogene & Polarity Tethyan Ammonoids s Ma Period Epoch Age/Stage Substage Cambrian) stages Cret) NZ Series NZ Stages Global Reconstructions (R. Blakey) Ryazanian Ryazanian Ryazanian [ no stages M17 CC2 Cretaceous Early Berriasian E Kochian Taitai Um designated ] M18 CC1 145 Berriasella jacobi M19 NJT1 Late M20 7b 146 Lt Portlandian M21 Durangites NJT1 M22 7a 147 Oteke Puaroan Op M22A Micracanthoceras microcanthum NJT1 Penglaizhenian M23 6b 148 Micracanthoceras ponti / Volgian Volgian Middle M24 Burckhardticeras peroni NJT1 Tithonian M24A 6a 149 M24B Semiformiceras fallauxi NJT15 M25 b E 150 M25A Semiformiceras semiforme NJT1 5a Early M26 Semiformiceras darwini 151 lt-Oxf N M-Sequence Hybonoticeras hybonotum 152 Ohauan Ko lt-Oxf R Kimmeridgian Hybonoticeras beckeri 153 m- Lt Late Oxf N Aulacostephanus eudoxus 154 m- NJT14 Late Aspidoceras acanthicum Oxf R Kimmeridgian Kimmeridgian Kimmeridgian Crussoliceras divisum 155 155.431 Card- N Ataxioceras hypselocyclum 156 E Early e-Oxf Sutneria platynota R Idoceras planula Suiningian 157 Cal- Oxf N Epipeltoceras bimammatum 158 lt- Lt Callo -
A Review of the Classification of Jurassic Aspidoceratid Ammonites – the Superfamily Aspidoceratoidea
VOLUMINA JURASSICA, 2020, XVIII (1): 47–52 DOI: 10.7306/VJ.18.4 A review of the classification of Jurassic aspidoceratid ammonites – the Superfamily Aspidoceratoidea Horacio PARENT1, Günter SCHWEIGERT2, Armin SCHERZINGER3 Key words: Superfamily Aspidoceratoidea, Aspidoceratidae, Epipeltoceratinae emended, Peltoceratidae, Gregoryceratinae nov. subfam. Abstract. The aspidoceratid ammonites have been traditionally included in the superfamily Perisphinctoidea. However, the basis of this is unclear for they bear unique combinations of characters unknown in typical perisphinctoids: (1) the distinct laevaptychus, (2) stout shells with high growth rate of the whorl section area, (3) prominent ornamentation with tubercles, spines and strong growth lines running in parallel over strong ribs, (4) lack of constrictions, (5) short to very short bodychamber, and (6) sexual dimorphism characterized by minia- turized microconchs and small-sized macroconchs besides the larger ones, including changes of sex during ontogeny in many cases. Considering the uniqueness of these characters we propose herein to raise the family Aspidoceratidae to the rank of a superfamily Aspi- doceratoidea, ranging from the earliest Late Callovian to the Early Berriasian Jacobi Zone. The new superfamily includes two families, Aspidoceratidae (Aspidoceratinae, Euaspidoceratinae, Epipeltoceratinae and Hybonoticeratinae), and Peltoceratidae (Peltoceratinae and Gregoryceratinae nov. subfam.). The highly differentiated features of the aspidoceratoids indicate that their life-histories -
301083243.Pdf
AMEGHINIANA ISSN 0002-7014 Revista de la Asociación Paleontológica Argentina Tomo XII Diciembre de 1975 N?4 THE INDO-PACIFIC AMMONITE MAY AITES IN THE OXFORDIAN OF THESOUTHERN ANDES By P. N. STIPANICIC', G. E. G. WESTERMANN 2 and A. C. RJCCARDI3 ABSTRACT: Oxfordian Iitho- and biostratigraphy of the Chilean and Argentine Andes is reviewed (P. N. Stipanicic). Within the Chacay Group, the Lower to basal Upper Oxfordian La Manga Formation, below, mostly detrital and biogenic, and the Upper Oxfordian Au- quilco Formation, above, mainly chemical, are distinguished. The La Manga Formation (with Gryphaea calceola lumachelle) is rich in ammonite faunas, particularly of thc upper Cordatum to lower Canaliculatum Zones. In Neuquén and Mendoza provinces of Argentina, the Pli- catilis Zone or Middle Oxfordian has yielded Perísphinctes spp., Euaspidoceras spp., Aspido- ceras spp., together with Mayaítes (Araucanites ) stípanícfcí, M. (A.) reyesi, and M. (A.) mulai, Westermann et Riccardi subgen. et spp. nov. The first find of Mayaitidae outside the Indo-Pacific province is discussed in light of _plate-tectonic theory. RESUMEN: La revisron Iito- y bioestratigráfica del Oxfordiano de los Andes de Argentina y Chile (P. N. Stipanicic) ha permitido reconocer dentro del Grupo Chacay: 1) abajo, la Formación La Manga, mayormente detrítica y biogénica, del Oxfordiano inferior-superior basa!, y 2) arriba, la Formación Auquilco, mayormente química, del Oxfordiano superior. La For- mación La Manga (con lumachelas de Gryphaea calceola) contiene abundante cantidad de amonitas, particularmente de las Zonas de Cordatum superior a Canaliculatum inferior. En las provincias de Mendoza y Neuquén,Argentina, la Zona de Plicatilis (Oxfordiano medio) contiene Perispbinctes spp., Euaspidoceras spp., Aspidoceras spp., conjuntamente con Mayaites (Araucanites) stipanicici, M.