DOCSLIB.ORG

Download This PDF File

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Download This PDF File Acta Geologica Polonica, Vol. 53 (2003), No. 1, pp. 1-18 Uppermost Cenomanian ammonites from Eure, Haute-Normandie, northwest France W. J. KENNEDY1, P. JUIGNET2 & J. GIRARD3 1Geological Collections, University Museum of Natural History, Parks Road, Oxford OX1 3PW, U.K. 2Département de Géologie, Université, 14032 Caen Cedex, France 3Rue du 8 mai 1945, 76530 Grand-Couronne, France ABSTRACT: KENNEDY, W.J., JUIGNET, P. & GIRARD, J. 2003. Uppermost Cenomanian ammonites from Eure, Haute-Normandie, northwest France. Acta Geologica Polonica, 53 (1), 1-18. Warszawa. Temporary exposures of chalks spanning the Cenomanian – Turonian boundary to the east of Brionne, Eure, Haute- Normandie, France, yielded well-preserved ammonite faunas. The Metoicoceras geslinianum Zone assemblage is: Pseudocalycoceras angolaense (SPAT H , 1931), Sumitomoceras cautisalbae (WRIGHT & KENNEDY, 1981), Calycoceras (Calycoceras) sp. juv., Eucalycoceras pentagonum (JUKES-BROWNE, 1896), Euomphaloceras septemseriatum (CRAGIN, 1893), Metoicoceras geslinianum (D’ORBIGNY, 1850), Hamites cimarronensis (KAUFFMAN & POWELL, 1977), Allocrioceras annulatum (SHUMARD, 1860), and Sciponoceras gracile (SHUMARD, 1860). The succeeding Neocardioceras juddii Zone assemblage is: Thomelites serotinus WRIGHT & KENNEDY, 1981, Neocardioceras juddii juddii (BARROIS & GUERNE, 1878), Neocardioceras juddii barroisi WRIGHT & KENNEDY, 1981, and Thomasites gongilensis (WOODS, 1911). Imprecisely localised are Pachydesmoceras sp., and Nigericeras aff. scotti COBBAN, 1972. The majority of the species are new for northern France, and confirm the northwards extension of typically Tethyan taxa (Thomasites, Nigericeras) into the Boreal region during the uppermost Cenomanian, and previously rec- ognized in southern England, as well as the occurrence of cosmopolitan acanthoceratids well-known at this level in the United States (Pseudocalycoceras, Sumitomoceras). Key words: Ammonites, Cenomanian, Turonian, Cretaceous, France. INTRODUCTION most Cenomanian zones of Metoicoceras geslinianum and Neocardioceras juddii, the latter not previously rec- In the west of the Paris Basin, in the Roumois ognized in the chalks of northwestern France. Many of region between the valleys of the Seine and Risle (Text- the species present are new to the region, and include a fig. 1) exposures of Cenomanian and Turonian chalks range of Tethyan and cosmopolitan taxa. were documented by JUIGNET (1974). Since that account, a temporary exposure at the now obscured Trou Tassin quarry on the plateau east of the Risle, STRATIGRAPHY close to Neuville-du-Bosc (Eure) exposed some tens of metres of chalk during the 1980’s, exploited for agricul- The sequence across the Cenomanian-Turonian tural purposes. One of us (J.G.) collected a suite of boundary interval is shown in Text-fig. 2. The section well-preserved ammonites from the upper part of the compares well with that exposed in the cliffs of Haute- section, which demonstrated the presence of the upper- Normandie at St-Jouin-Bruneval, Antifer-Le Tilleul, 2 W. J. KENNEDY & al. Fig. 1 Locality map for the Brionne area, Eure, Haute-Normandie, France, showing the position of the Trou Tassin Quarry and Fécamp (JUIGNET & BRETON 1994). From bottom Section for the base of the Turonian stage is shown in to top, the sequence is as follows. Text-fig. 3, as is that recognized in Southern England 1. Craie de Rouen (2 m exposed): bioturbated chalk (WRIGHT & KENNEDY 1981, 1984). The definition of the with a line of black flints. The sequence passes up into base of the Turonian Stage adopted here follows that a nodular chalk, terminated by a glauconitized hard- provisionally adopted by the Turonian Working Group ground, equivalent to the hardgrounds Antifer 1 and 2 of the Subcommission on Cretaceous Stratigraphy at its of the regional reference sections. meetings during the Second International Symposium 2. Craie d’Antifer (60 cm): bioturbated chalk with on Cretaceous Stage Boundaries held in Brussels from nodules and glauconitized pebbles resting on the top September 8-16, 1995 (BENGTSON 1996): the first occur- surface of the underlying hardground. The unit is ter- rence of the ammonite Watinoceras coloradoense minated by a hardground that can be correlated with WRIGHT & KENNEDY, 1981, at the base of Bed 86 of the the regional Antifer 3 hardground. This unit yields the Pueblo section. Metoicoceras geslinianum Zone fauna documented The fauna from the Craie d’Antifer is as follows, below. and can be referred to the western European 3. Craie du Cap Fagnet (5.8 m): bioturbated chalks Metoicoceras geslinianum Zone and the coeval United with nodular horizons and incipient hardgrounds, States Western Interior Sciponoceras gracile Zone: notably in the upper part, the latter equivalent to the Pseudocalycoceras angolaense (SPAT H , 1931), regional Fagnet Hardground. Lines of small black flints Sumitomoceras cautisalbae (WRIGHT & KENNEDY, occur in the upper part. The sparsely nodular chalks in 1981), Sumitomoceras cf. conlini (WRIGHT & KENNEDY, the lowest part of the sequence yielded the 1981), Calycoceras (Calycoceras) sp. juv., Eucalycoceras Neocardioceras juddii Zone ammonites described below. pentagonum (JUKES-BROWNE, 1896), Euomphaloceras 4. Craie du Val St-Nicolas (1 m exposed): chalks septemseriatum (CRAGIN, 1893), Metoicoceras geslini- with scattered nodules, common inoceramid debris, anum (D’ORBIGNY, 1850), Hamites cimarronensis and a course of black flints. KAUFFMAN & POWELL, 1977, Allocrioceras annulatum (SHUMARD, 1860), and Sciponoceras gracile (SHUMARD, 1860). Elements of this fauna occur widely in Europe, THE AMMONITE FAUNAS and all but S. cautisalbae occur in the U.S. Gulf Coast and Western Interior, providing an excellent basis for The ammonite zonal sequence across the intercontinental correlation. Cenomanian-Turonian boundary recognized at Pueblo, The ammonites from the basal part of the Craie du Colorado, the candidate Global Boundary Stratotype Cap Fagnet can be referred to the Neocardioceras juddii CENOMANIAN AMMONITES FROM NORTHWEST FRANCE 3 Fig. 2. The Cenomanian-Turonian boundary interval at the Trou Tassin Quarry, Eure, Haute-Normandie, France 4 W. J. KENNEDY & al. Fig. 3. The ammonite zonal sequence across the Cenomanian-Turonian boundary recognised at Pueblo, Colorado, candidate Global Stratotype section for the base of the Turonian Stage, and in southern England Zone: N. juddii juddii (BARROIS & GUERNE, 1878), N. immediately prior to the Metoicoceras geslinianum juddii barroisi WRIGHT & KENNEDY 1981, and Zone (Calycoceras guerangeri Zone in Europe, Thomasites gongilensis (WOODS, 1911). Of particular Metoicoceras mosbyense/Dunveganoceras pondi Zone in interest is the occurrence of Thomasites, a typically the U.S. Western Interior) we see European incursions Tethyan genus of the uppermost Cenomanian and into the Interior, with Protacanthoceras proteus Lower Turonian (CHANCELLOR & al. 1994) which WRIGHT & KENNEDY, 1987, known from the Black spread northwards during the latest Cenomanian, and Hills in the Northern Interior and Calycoceras is frequent in the juddii Zone in southern England (Proeucalycoceras) guerangeri (SPAT H , 1926), (WRIGHT & KENNEDY 1981), and in the northern Eucalycoceras pentagonum, Euomphaloceras euom- Aquitaine (Port-des-Barques, south of La Rochelle, phalum (SHARPE, 1855), and Vascoceras diartianum Charente-Maritime: Oxford University Museum of (D’ORBIGNY, 1850) in New Mexico (KENNEDY & al. Natural History Collections). 1996; COBBAN & al. 1989). The record of Nigericeras aff. scotti COBBAN, 1971, Following this, Metoicoceras and Neocardioceras, is based on a specimen found loose. N. scotti character- present in the Western Interior in the lower Upper izes a narrow interval between the upper Cenomanian Cenomanian spread to Europe and elsewhere. As well juddii Zone and the basal Turonian Watinoceras colora- as this interchange there are other common taxa, doense Zone in the U.S. Western Interior (COBBAN & notably species of Sciponoceras and Euomphaloceras SCOTT 1973), and we presume it to be derived from the that occur in both Europe, the Western Interior and lower part of the Craie du Cap Fagnet; it too is an immi- much of the rest of the world at this time. grant, for Nigericeras is a common element in Tethyan Thomasites, common on the south side of Tethys in Upper Cenomanian faunas (e.g. MEISTER & al. 1992). the Upper Cenomanian of Nigeria other parts of West We have seen no ammonite evidence for the lowest Africa spread northwards into the Anglo-Paris Basin Turonian Watinoceras devonense Zone in the faunas and the Southern Interior for a brief interval in the jud- from the Craie du Cap Fagnet of Trou Tassin, but cor- dii Zone and immediately prior to this. relative sections on the coast yield ammonites of the Lower Turonian Mammites nodosoides Zone some metres above the base of the unit. CONVENTIONS The uppermost Cenomanian faunas from Haute Normandie agree closely with those known from else- Location of specimens: The following abbreviations where in the Anglo-Paris Basin (southern England, are used to indicate the location of specimens men- Boulonnais, Aube), Provence and Germany. They are tioned in the text: particularly characterised by the appearance of a range BMNH: British Museum (Natural History), London of taxa that had been previously restricted to the U.S. BGS: British Geological Survey, Keyworth Western Interior and Gulf Coast regions, as well as JG: Jerome Girard Collection, Museum d’Histoire some Tethyan incursors. This mingling of faunas
Load more

Recommended publications
  • GSSP) for the Base of the Cenomanian Stage, Mont Risou, Hautes-Alpes, France
    21 by W.J. Kennedy1, A.S. Gale2, J.A. Lees3, and M. Caron4 The Global Boundary Stratotype Section and Point (GSSP) for the base of the Cenomanian Stage, Mont Risou, Hautes-Alpes, France 1 Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, U.K. 2 Department of Palaeontology, The Natural History Museum, Cromwell Road, London SW7 5BP, U.K. and School of Earth and Environ- mental Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4AW, U.K. 3 Research School of Geological and Geophysical Sciences, Birkbeck College and University College London, Gower Street, London WC1E 6BT, U.K. 4 Institut de Géologie, Université de Fribourg, CH-1700 Fribourg, Switzerland. Following the unanimous recommendation of the Inter- Grès Vert Supérieur etc., and taking the name from Touraine national Commission on Stratigraphy, the Global (Roman Turonia). Five years later, he realized that two distinct ammonite and rudist faunas were present, and he restricted the term boundary Stratotype Section and Point (GSSP) for the Turonian to beds corresponding to his third zone of rudists, yielding base of the Cenomanian Stage is defined at a level 36 “Ammonites lewesiensis, peramplus, Vielbancii, Woolgari, Fleuri- metres below the top of the Marnes Bleues Formation, a ausianus, Deverianus etc.”, “le plus beau type côtier étant très prononcé dans toute la Touraine, et nous donnerons à la partie level that corresponds to the the first appearance of the inférieure le nom d’étage Cénomanien, le Mans (Cenomanum), en planktonic foraminiferan Rotalipora globotruncanoides montrant à la fois le type sous-marin” (d'Orbigny, 1848–1851, p.
    [Show full text]
  • Le Mans, France
    High-resolution biostratigraphy and chemostratigraphy of the Cenomanian stratotype area (Le Mans, France) Delphine Desmares, Marc Testé, Bérengère Broche, Maxime Tremblin, Silvia Gardin, Loïc Villier, Edwige Masure, Danièle Grosheny, Nicolas Morel, Patrice Raboeuf To cite this version: Delphine Desmares, Marc Testé, Bérengère Broche, Maxime Tremblin, Silvia Gardin, et al.. High- resolution biostratigraphy and chemostratigraphy of the Cenomanian stratotype area (Le Mans, France). Cretaceous Research, Elsevier, 2020, 10.1016/j.cretres.2019.104198. hal-02328773 HAL Id: hal-02328773 https://hal.archives-ouvertes.fr/hal-02328773 Submitted on 23 Oct 2019 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. Journal Pre-proof High-resolution biostratigraphy and chemostratigraphy of the Cenomanian stratotype area (Le Mans, France) Delphine Desmares, Marc Testé, Bérengère Broche, Maxime Tremblin, Silvia Gardin, Loïc Villier, Edwige Masure, Danièle Grosheny, Nicolas Morel, Patrice Raboeuf PII: S0195-6671(19)30086-2 DOI: https://doi.org/10.1016/j.cretres.2019.104198 Reference: YCRES 104198 To appear in: Cretaceous Research Received Date: 1 March 2019 Revised Date: 12 July 2019 Accepted Date: 31 July 2019 Please cite this article as: Desmares, D., Testé, M., Broche, B., Tremblin, M., Gardin, S., Villier, L., Masure, E., Grosheny, D., Morel, N., Raboeuf, P., High-resolution biostratigraphy and chemostratigraphy of the Cenomanian stratotype area (Le Mans, France), Cretaceous Research, https:// doi.org/10.1016/j.cretres.2019.104198.
    [Show full text]
  • Schmitz, M. D. 2000. Appendix 2: Radioisotopic Ages Used In
    Appendix 2 Radioisotopic ages used in GTS2020 M.D. SCHMITZ 1285 1286 Appendix 2 GTS GTS Sample Locality Lat-Long Lithostratigraphy Age 6 2s 6 2s Age Type 2020 2012 (Ma) analytical total ID ID Period Epoch Age Quaternary À not compiled Neogene À not compiled Pliocene Miocene Paleogene Oligocene Chattian Pg36 biotite-rich layer; PAC- Pieve d’Accinelli section, 43 35040.41vN, Scaglia Cinerea Fm, 42.3 m above base of 26.57 0.02 0.04 206Pb/238U B2 northeastern Apennines, Italy 12 29034.16vE section Rupelian Pg35 Pg20 biotite-rich layer; MCA- Monte Cagnero section (Chattian 43 38047.81vN, Scaglia Cinerea Fm, 145.8 m above base 31.41 0.03 0.04 206Pb/238U 145.8, equivalent to GSSP), northeastern Apennines, Italy 12 28003.83vE of section MCA/84-3 Pg34 biotite-rich layer; MCA- Monte Cagnero section (Chattian 43 38047.81vN, Scaglia Cinerea Fm, 142.8 m above base 31.72 0.02 0.04 206Pb/238U 142.8 GSSP), northeastern Apennines, Italy 12 28003.83vE of section Eocene Priabonian Pg33 Pg19 biotite-rich layer; MASS- Massignano (Oligocene GSSP), near 43.5328 N, Scaglia Cinerea Fm, 14.7 m above base of 34.50 0.04 0.05 206Pb/238U 14.7, equivalent to Ancona, northeastern Apennines, 13.6011 E section MAS/86-14.7 Italy Pg32 biotite-rich layer; MASS- Massignano (Oligocene GSSP), near 43.5328 N, Scaglia Cinerea Fm, 12.9 m above base of 34.68 0.04 0.06 206Pb/238U 12.9 Ancona, northeastern Apennines, 13.6011 E section Italy Pg31 Pg18 biotite-rich layer; MASS- Massignano (Oligocene GSSP), near 43.5328 N, Scaglia Cinerea Fm, 12.7 m above base of 34.72 0.02 0.04 206Pb/238U
    [Show full text]
  • Towards a Phylogenetic Classification of the Cretaceous Ammonites V
    N.Jb. Geo\. Palaont. Abh. Stuttgart, Januar 1997 Towards a phylogenetic classification of the Cretaceous ammonites V. Euomphaloceratidae By M. R. Cooper, Durban With 5 figures in the text COOPER, M. R. (1997): Towards a phylogenetic classification of the Cretaceous ammo­ nites. V. Euomphaloceratidae. - N. Jb. Geo\. Palaont., Abh., 203: 1-21; Stuttgart. Abstract: Phylogenetic analysis of Euomphaloceratinae COOPER, 1978, a group within highly diversified and heterogeneous Acanthocerataceae, indicates a fundamental dichotomy which suggests promotion of this taxon to family rank with recognition of two subfamilies. Nominate Euomphaloceratinae comprise E. (Euomphaloceras), E. (Kanabiceras), Burroceras, Paraburroceras, P. (Pseudaspidoceras), P. (Ampakabites), and Morrowites, and Romaniceratinae subfam. nov. is made up of Schindewo/fites, Kameruno­ ceras, Codazziceras, Proromaniceras (Proromaniceras), P. (Obiraceras), Neomphaloceras, Yubariceras and Romaniceras (?with Shuparoceras as a subgenus). Zusammenfassung: Die phylogenetische Analyse der Euomphaloceratinae COOPER, 1978, einer Gruppe der hoch diversifizierten und heterogenen Acanthocerataceae, weist auf eine fundamentale Dichotomie innerhalb der Unterfamilie hin. Der Gruppe wird daher Familienrang verliehen und zwei Unterfamilien abgegrenzt. Die Nominat-Unter­ familie Euomphaloceratinae umfaBt E. (Euomphaloceras), E. (Kanabiceras), Burroceras, Paraburroceras, P. (Pseudaspidoceras), P. (Ampakabites) und Morrowites. Zur zweiten Unterfamilie Romaniceratinae subfam. nov. gehiiren Schindewo/fites,
    [Show full text]
  • Phylogeny, Diversity, and Ecology of the Ammonoid Superfamily Acanthoceratoidea Through the Cenomanian and Turonian
    PHYLOGENY, DIVERSITY, AND ECOLOGY OF THE AMMONOID SUPERFAMILY ACANTHOCERATOIDEA THROUGH THE CENOMANIAN AND TURONIAN DAVID A.A. MERTZ A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 2017 Committee: Margaret Yacobucci, Advisor Andrew Gregory Keith Mann © 2017 David Mertz All Rights Reserved iii ABSTRACT Margaret Yacobucci Both increased extinction and decreased origination, caused by rising oceanic anoxia and decreased provincialism, respectively, have been proposed as the cause of the Cenomanian Turonian (C/T) extinction event for ammonoids. Conflicting evidence exists for whether diversity actually dropped across the C/T. This study used the ammonoid superfamily Acanthoceratoidea as a proxy for ammonoids as a whole, particularly focusing on genera found in the Western Interior Seaway (WIS) of North America, including Texas. Ultimately, this study set out to determine 1) whether standing diversity decreased across the C/T boundary in the WIS, 2) whether decreased speciation or increased extinction in ammonoids led to a drop in diversity in the C/T extinction event, 3) how ecology of acanthoceratoid genera changed in relation to the C/T extinction event, and 4) whether these ecological changes indicate rising anoxia as the cause of the extinction. In answering these questions, three phylogenetic analyses were run that recovered the families Acanthoceratidae, Collignoniceratidae, and Vascoceratidae. Pseudotissotiidae was not recovered at all, while Coilopoceratidae was recovered but reclassified as a subfamily of Vascoceratidae. Seven genera were reclassified into new families and one genus into a new subfamily. After calibrating the trees with stratigraphy, I was able to determine that standing diversity dropped modestly across the C/T boundary and the Early/Middle Turonian boundary.
    [Show full text]
  • CHAPTER I I I Sistematic DESCRIPTION
    CHAPTER III SiSTEMATIC DESCRIPTION CIUPTER III systematic description Section I : Mortonlceratinae Introduction : The ammonoid species described by Stoliczka under the group of Ammonites crlstatl were sub­ divided by him into species 1, Ammonites blanfordianus, 2, Ammonites inflatus, condollianus. ootatoorensis and corruptus, 3, Amnionites propinquus. 4. Ammonites obesus, 5. Ammonites se rratocarlnatus. 6, Ammonite s subtricarinatus. These were transferred by later workers e.g. Kossmat to Schloenbachia and its subgenera as : Schloenbachla (Tropitoldes) . S. (Prlnotropis) . S. (Peroniceras). S, (Munerlceras) etc. According to present ideas the above mentioned species have undergone further transfers and except those of the Inflata group, are placed under different subfamilies, viz. Peroniceratlnae, Mune rice rat inae, etc. These species are, therefore, not considered under the present section; but those of the Inflata group which are now found to belong to the sub­ family Mortonlceratinae are dealt with here. The species which represent this subfamily in the present collection, viz. Mortoniceras (Mortoniceras) inflatum (Sow.); M. (M.) rostratum (Sow.), Mortonioeras (Peiradoceras) indicum spo nov., M. (Purnovarites) perinflatum Spath., M. (p.) - 17 - - 18 - subquadratum Spath, M. (d .) sp. Indet; ?Mortonicera8 (?Mortoniceras) deshpandel sp, nov., Prohysteroceras (Goodhallltes) stoliczkal sp. nov. are dealt with here., Of these eight species Mortonlceras (Mortonlceras) inflatum was described by Stoliczka and Kossmat from these rocks. Three species viz. Mortoniceras (M.) rostratum (Sow.), M. (Durnovarites) perlnflatum Spath., M. (D .) subquadratum Spath. are species already known and are recorded from outside South Indian basin; they are now recorded here for the first time. The remaining species described here are new to science. The subfamily Mortoniceratinae has an interesting history, being used in the first instance by Spath (1925) to comprise species of texanum group of Senonian.
    [Show full text]
  • Mid-Cretaceous Ammonite Sequence for Western New Mexico Iv
    iii Contents ABSTRACT 5 Genus Morrowites Cobban and Hook, n. gen. 9 Morrowites wingi (Morrow) 9 INTRODUCTION 5 M. depressus (Powell) 11 COMPOSITION OF MOLLUSCAN FAUNA 5 M. subdepressus Cobban and Hook, n. sp. 11 OCCURRENCE AND PRESERVATION OF FOSSILS 6 M. cf. M. dixeyi (Reyment) 12 STRATIGRAPHIC POSITION OF FOSSILS 6 Subfamily Euomphaloceratinae Cooper 13 COLLECTION LOCALITIES 7 Genus Kamerunoceras Reyment 13 Kamerunoceras turoniense (d'Orbigny) 13 FAMILY VASCOCERATIDAE H. Douvillé 14 SYSTEMATIC PALEONTOLOGY 7 Subfamily Vascoceratinae H. Douvillé 14 FAMILY BACULITIDAE GILL 7 Genus Neoptychites Kossmat 14 Genus Baculites Lamarck 7 Neoptychites cephalotus (Courtiller) 14 Baculites yokoyamai Tokunaga and Shimizu 7 Genus Fagesia Pervinquière 15 FAMILY MUNIERICERATIDAE WRIGHT 7 Fagesia superstes (Kossmat) 16 Genus Tragodesmoceras Spath 7 FAMILY C OLLIGNONICERATIDAE WRIGHT AND WRIGHT 16 Tragodesmoceras socorroense Cobban and Hook 7 Subfamily Barroisiceratinae Basse 16 FAMILY PLACENTICERATIDAE HYATT 8 Genus Cibolaites Cobban and Hook, n. gen. 16 Genus Placenticeras Spath 8 Cibolaites molenaari Cobban and Hook, n. sp. 16 Placenticeras cumminsi Cragin 8 REFERENCES 18 FAMILY ACANTHOCERATIDAE DE GROSSOUVRE 8 Subfamily Mammitinae Hyatt 8 Genus Mammites PLATES 1-14 21 Laube and Bruder 8 INDEX 50 Mammites nodosoides (Schluter) 8 TABLE 1—Mid-Cretaceous ammonite sequence for western New Mexico iv FIGURES 1—Location of study area 5 9—Histogram of size and body chambers of Neoptychites 2—External sutures of Mammites nodosoides (Schluter) 9 3— cephalotus (Courtiller) 14 Whorl sections of Morrowites wingi (Morrow) 10 4—External 10—Scatter diagram of breadth to diameter ratio of Neop- suture of Morrowites wingi (Morrow) 10 5—Whorl section and tychites 14 suture of Morrowites depressus 11—External sutures of Neoptychites cephalotus (Cour-tiller) 15 (Powell) 11 12—External suture of Fagesia superstes (Kossmat) 16 13— 6—External sutures of Morrowites subdepressus Cobban and Histogram of size of body chambers of Cibolaites molenaari Hook, n.
    [Show full text]
  • Cretaceous Cephalopods of the Tethyan Himalaya of Southern Tibet 79-105 © Biodiversity Heritage Library
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Zitteliana - Abhandlungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie Jahr/Year: 2002 Band/Volume: 23 Autor(en)/Author(s): Immel Harald, Guoxiong He Artikel/Article: Cretaceous cephalopods of the Tethyan Himalaya of southern Tibet 79-105 © Biodiversity Heritage Library, http://www.biodiversitylibrary.org/; www.zobodat.at Zitteliuna 23 79-105 Í1RS., 4 p]s. München, 15.12.2002 ISSN 0373-9627 Cretaceous cephalopods of the Tethyan Himalaya of southern Tibet Von HARALD LMMLL & HE GUOXIONG ABSTRACT Following .i short review of the regional and stratigraphic In conclusion some palaeobiogeographic aspects are distribution ot Cretaceous cephalopods (Neocomian - discussed. The ammonite fauna ot the Middle Cretaceous Maastrichtian, especially Aptian to Cenomanian) from the shows some influence from the southern temperate realm but Tethvan Himalaya of southern Tibet 29 taxa are described, indicates a closer relationship to the hoplitimd faunal province including three new species: Plcinobophtcs (Pleurohoplitcs) of the northern temperate (boreal) realm. This suggests that robusticostatm, Lemuroceras tibcticum, and Tnnobduntcs during the Middle Cretaceous the Tethvan Himalaya of multitubercuLitus. southern Tibet might have occupied a geographic position larther to the north, with an open marine connection to the south. KURZFASSUNG Ausgehend von der regionalen und stratigraphischen Ver­ Abschließend werden einige pnl.iobiogeogrnphische Zusam­ breitung kret.r/ischer Cephalopoden (Neokom - Maastricht) menhänge diskutiert. Die mittelkretazische Ammonitenfauna des Tethvs-Himalaya von Siidtibet werden 29 Gattungen und zeigt neben Einflüssen aus dem südlichen gemäßigten Bereich Arten beschrieben, vor allem aus dem Apt - Ccnoinan. Dabei vor allem enge Beziehungen zur Hophten-Provinz des nörd­ werden drei neue Arten aufgestellt: Plenroboplites (Pleuro- lichen gemäßigten (borealen) Raumes.
    [Show full text]
  • Des Faunes D'ammonites Du Cenomanien Du Sud-Est De
    Bull. Soc. géol. France, 1999, t. 170, n° 5, pp. 599-610 BIOCHRONOLOGIE QUANTITATIVE (ASSOCIATIONS UNITAIRES) DES FAUNES DAMMONITES DU CENOMANIEN DU SUD-EST DE LA FRANCE Claude MONNET* & Hugo BUCHER* Centre des Sciences de la Terre, CNRS - ERS 2042, Université Claude Bernard Lyon I, 27-43, boulevard du 11 Novembre, F-69622 VILLEURBANNE. Email: [email protected] Manuscrit déposé le 14 janvier 1999; accepté après révision le 7 avril 1999 Mots clés. - Ammonite, Cénomanien, Turonien, Associations Unitaires, Sud-est de la France (Bassin vocontien), Bassin Anglo- parisien, Diachronisme, Renouvellements fauniques Résumé. - La zonation dammonites du Cénomanien du sud-est de la France est révisée dans ce travail. Elle intéresse 138 espèces dammonites réparties sur 40 coupes. Ces données publiées par Thomel [1992] sont analysées au moyen de la méthode des associations unitaires [Guex, 1977, 1991]. Une suite logique danalyses, dont le but est doptimiser les données en soulignant les incohérences majeures de la documentation originelle, aboutit à la formation dune succession chronologique de 27 associations unitaires réunies en 7 zones dassociation latéralement reproductibles. Son application souligne les très rapides variations latérales de faciès même dans la partie distale du bassin et met en évidence un faible diachronisme des espèces (mais incluant certains index de zones). Cette analyse suggère également une diminution progressive des pulsations montrées par les taux de renouvellements fauniques durant le Cénomanien inférieur et moyen, jusquà ce quun état déquilibre soit atteint au Cénomanien supérieur et Turonien inférieur, sans changement apparent à la limite Cénomanien-Turonien. Cette tendance est accompagnée par un doublement rapide de la diversité spécifique durant la fin du Cénomanien inférieur et une décroissance progressive et prolongée à partir de la fin du Cénomanien moyen.
    [Show full text]
  • Characteristic Marine Molluscan Fossils from the Dakota Sandstone and Intertongued Mancos Shale, West-Central New Mexico
    Characteristic Marine Molluscan Fossils From the Dakota Sandstone and Intertongued Mancos Shale, West-Central New Mexico GEOLOGICAL SURVEY PROFESSIONAL PAPER 1009 Characteristic Marine Molluscan Fossils From the Dakota Sandstone and Intertongued Mancos Shale, West-Central New Mexico By WILLIAM A. COBBAN GEOLOGICAL SURVEY PROFESSIONAL PAPER 1009 Brief descriptions, illustrations, and stratigraphic sequence of the more common fossils at the base of the Cretaceous System UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1977 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916- Characteristic marine molluscan fossils from the Dakota sandstone and intertongued Mancos shale, West- central New Mexico. (Geological Survey professional paper ; 1009) Bibliography: p. Includes index. 1. Lamellibranchiata, Fossil. 2. Gastropoda, Fossil. 3. Ammonoidea. 4. Paleontology Cretaceous. 5. Paleontol­ ogy New Mexico. I. Title: Characteristic marine molluscan fossils from the Dakota sandstone ***!!. Series: United States. Geological Survey. Professional paper ; 1009. QE811.G6 564'.09789'8 76-26956 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-03003-9 CONTENTS Page Abstract ________________________________________--__- 1 Introduction ________________________________________ Acknowledgments _____________________________ Stratigraphic summary _________________________
    [Show full text]
  • Bulletin of the British Museum (Natural History)
    Origin, evolution and systematics of the dwarf Acanthoceratid Protacanthoceras Spath, 1923 (Cretaceous Ammonoidea) C. W. Wright Old Rectory, Seaborough, Beaminster, Dorset DT8 3QY W. J. Kennedy Geological Collections, University Museum, Parks Road, Oxford OX1 3PW Contents Synopsis ............. 65 Introduction ............. 66 Evolutionary origins ........... 66 Dimorphism ............. 67 Localities ............. 67 Stratigraphy ............. 68 Systematic descriptions ........... 68 Family Acanthoceratidae Hyatt ......... 68 Genus Protacanthoceras Spath ......... 68 Protacanthoceras tuberculatum Thomel ... .71 Protacanthoceras tuberculatum tuberculatum Thomel .. .71 Protacanthoceras tuberculatum Thomel mite subsp. nov. .... 74 Protacanthoceras tuberculatum Thomel devonense subsp. nov. ... 76 Protacanthoceras tuberculatum Thomel cyclopeum subsp. nov. ... 80 Protacanthoceras arkelli sp. nov. ........ 82 Protacanthoceras arkelli arkelli subsp. nov. ...... 84 Protacanthoceras arkelli verrucosum subsp. nov. ..... 86 Protacanthoceras tegulicium sp. nov. ........ 88 Protacanthoceras asgeirri sp. nov. ........ 90 Protacanthoceras bunburianum (Sharpe) ....... 91 Protacanthoceras proteus sp. nov. ........ 95 Protacanthoceras proteus proteus subsp. nov. ...... 95 Protacanthoceras proteus baylissi subsp. nov. ...... 96 Protacanthoceras imperatoris sp. nov. ....... 97 Other species previously referred to Protacanthoceras ...... 99 'Acanthoceras' cuspidum Stephenson ....... 99 ' Acanthoceras' aff. cuspidum Stephenson . .100 Ammonites tropicus Stoliczka
    [Show full text]
  • Taxonomy and Stratigraphic Distribution of the Ammonite Schloenbachia Neumayr, 1875 from the Bohemian Cretaceous Basin
    FOSSIL IMPRINT • vol. 75 • 2019 • no. 1 • pp. 64–69 (formerly ACTA MUSEI NATIONALIS PRAGAE, Series B – Historia Naturalis) TAXONOMY AND STRATIGRAPHIC DISTRIBUTION OF THE AMMONITE SCHLOENBACHIA NEUMAYR, 1875 FROM THE BOHEMIAN CRETACEOUS BASIN MARTIN KOŠŤÁK1,*, JAN SKLENÁŘ2, MARTIN MAZUCH1, STANISLAV ČECH3 1 Institute of Geology and Palaeontology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, the Czech Republic; e-mail: [email protected], martin.mazuch@ natur.cuni.cz. 2 Department of Palaeontology, National Museum, Václavské náměstí 68, 110 00 Praha 1, the Czech Republic; e-mail: [email protected]. 3 Czech Geological Survey, Klárov 3/131, 118 21 Praha 1, the Czech Republic; e-mail: [email protected]. * corresponding author Košťák, M., Sklenář, J., Mazuch, M., Čech, S. (2019): Taxonomy and stratigraphic distribution of the ammonite Schloenbachia NEUMAYR, 1875 from the Bohemian Cretaceous Basin – Fossil Imprint, 75(1): 64–69, Praha. ISSN 2533-4050 (print), ISSN 2533-4069 (on-line). Abstract: Only two specimens of the ammonite genus Schloenbachia have hitherto been recorded from the Bohemian Cretaceous Basin (BCB). While the first specimen was originally described by Dr. J. Soukup in the 1970s, the other one was discovered in an older collection of the Faculty of Science, Charles University in Prague in 2018. Recently, both specimens were systematically investigated and interpreted as Schloenbachia lymensis, a new ammonite species for the BCB. The stratigraphic distribution of S. lymensis as well as the palaeobiogeography of this taxon are discussed in this paper. Key words: Upper Cenomanian, Bohemian Cretaceous Basin, ammonites, Schloenbachia lymensis Received: March 1, 2019 | Accepted: May 29, 2019 | Issued: August xx, 2019 Introduction group is still under discussion (Wright and Kennedy 2015, Machalski 2018, and others).
    [Show full text]