Upper Cretaceous) and Their Stratigraphic Implications
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Double Alignments of Ammonoid Aptychi from the Lower Cretaceous of Southeast France: Result of a Post−Mortem Transport Or Bromalites?
Double alignments of ammonoid aptychi from the Lower Cretaceous of Southeast France: Result of a post−mortem transport or bromalites? STÉPHANE REBOULET and ANTHONY RARD Reboulet, S. and Rard, A. 2008. Double alignments of ammonoid aptychi from the Lower Cretaceous of Southeast France: Result of a post−mortem transport or bromalites? Acta Palaeontologica Polonica 53 (2): 261–274. A new preservation of aptychi is described from the Valanginian limestone−marl alternations of the Vergol section (Drôme), located in the Vocontian Basin (SE France). Aptychi are arranged into two parallel rows which are generally 50 mm in length and separated by 4 mm. The alignments are very often made by entire aptychi (around 10 mm in length), oriented following their harmonic margin. Aptychi show the outside of valve to the viewer: they are convex−up. This fos− silization of aptychi is successively interpreted as the result of post−mortem transport by bottom currents (taphonomic− resedimentation process) or the residues (bromalites: fossilized regurgitation, gastric and intestinal contents, excrement) from the digestive tract of an ammonoid−eater (biological processes). Both the parallel rows of aptychi are more likely in− terpreted as a coprolite (fossil faeces) and they could be considered as both halves (hemi−cylindrical in shape) of the same cylindrical coprolite which would have been separated in two parts (following the long axis) just after the animal defe− cated. Considering this hypothesis, a discussion is proposed on the hypothetical ammonoid−eater responsible for them. Key words: Ammonoidea, taphonomy, aptychus, coprolite, predation, Valanginian, Cretaceous, France. Stéphane Reboulet [stephane.reboulet@univ−lyon1.fr], Université de Lyon, (UCBL1, La Doua), UFR des Sciences de la Terre, CNRS−UMR 5125 PEPS, Bâtiment Géode, 2 Rue Raphaël Dubois, 69622 Villeurbanne cedex, France; Anthony Rard [anthony.rard@cc−thouarsais.fr], Centre d'interprétation géologique du Thouarsais, Réserve Naturelle Géologique du Toarcien, Les Ecuries du Château, 79100 Thouars, France. -
Cephalopods from the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, with a Description of the Highest Ammonite Zones in North America
PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK, NY 10024 Number 3454, 64 pp., 22 ®gures, 2 tables August 23, 2004 Cephalopods from the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, with a Description of the Highest Ammonite Zones in North America. Part 1. Maryland and North Carolina NEIL H. LANDMAN,1 RALPH O. JOHNSON,2 AND LUCY E. EDWARDS3 ABSTRACT The sedimentary deposits on the Atlantic Coastal Plain in New Jersey, Delaware, Maryland, North Carolina, South Carolina, and Georgia span the Cretaceous/Tertiary boundary. We in- vestigate the ammonites of the Severn Formation on the western and eastern shore of Ches- apeake Bay, Maryland, and the Peedee Formation, North Carolina. We describe three am- monite assemblages from the Severn Formation and their associated dino¯agellates, de®ning three successive ammonite zones in the upper Maastrichtian. The lowest ammonite zone is the Discoscaphites conradi Assemblage Zone. It occurs near the top of the Severn Formation in Prince Georges County, Maryland, just below the Paleocene Brightseat Formation. The ammonite fauna consists of Sphenodiscus pleurisepta (Conrad, 1857), Sphenodiscus lobatus (Tuomey, 1856), Discoscaphites conradi (Morton, 1834), Discoscaphites gulosus (Morton, 1834), Jeletzkytes nebrascensis (Owen, 1852), Glyptoxoceras rugatum (Forbes, 1846), Bacu- lites vertebralis Lamarck, 1801, and Eubaculites latecarinatus (Brunnschweiler, 1966). Di- no¯agellates from a sample of matrix include Isabelidinium aff. I. cooksoniae (Alberti, 1959) Lentin & Williams, 1977, which correlates with calcareous nannofossil Zone CC25b, indicat- ing the lower part of the upper Maastrichtian (68.2±67.4 MaBP). The D. conradi Zone is also present in parts of the Corsicana Formation, Texas, the Prairie Bluff Chalk, Alabama and 1 Division of Paleontology (Invertebrates), American Museum of Natural History ([email protected]). -
Paleontology of Cretaceous Coon Creek Editors Dana Ehret, Lynn Harrell & Sandy Ebersole BULLETIN ALABAMA MUSEUM of NATURAL HISTORY
Bulletin 33 May 1, 2016 Paleontology of Cretaceous Coon Creek Editors Dana Ehret, Lynn Harrell & Sandy Ebersole BULLETIN ALABAMA MUSEUM OF NATURAL HISTORY The scientific publication of the Alabama Museum of Natural History. Dr. Dana J. Ehret, Editor. BULLETIN ALABAMA MUSEUM OF NATURAL HISTORY is published by the Al a bama Museum of Natural History, a unit of The University of Alabama. The BULLETIN succeeds its predecessor, the MUSEUM PAPERS, which was ter mi nat ed in 1961 upon the transfer of the Museum to the University from its parent orga ni za- tion, the Geological Survey of Alabama. The BULLETIN is devoted primarily to scholarship and research concerning the natural history of Alabama and the Southeast. It appears twice yearly in consec u tive ly numbered issues. Communication concerning manuscripts, style, and editorial policy should be addressed to: Editor, BULLETIN ALABAMA MUSEUM OF NATURAL HISTORY, The University of Alabama, Box 870340, Tuscaloosa, Alabama 35487-0340; tele- phone (205) 348-7551 or emailed to [email protected]. Prospective authors should ex am ine the Notice to Au thors inside the back cover. Orders and requests for general information should be addressed to BULLETIN ALABAMA MUSEUM OF NAT U RAL HISTORY, at the above address or emailed to [email protected]. Yearly sub scrip tions (two issues) are $30.00 for indi vid u als, $50.00 for cor po ra tions and institutions. Numbers may be purchased in di vid u al ly. Payment should ac com pa ny orders and subscriptions and checks should be made out to “The Uni ver si ty of Alabama.” Library exchanges should be handled through: Exchange Librarian, The University of Alabama, Box 870266, Tuscaloosa, Alabama 35487- 0340. -
Biostratigraphy, Paleogeography, and Paleoenvironments
BIOSTRATIGRAPHY, PALEOGEOGRAPHY, AND PALEOENVIRONMENTS OF THE UPPER CRETACEOUS (CAMPANIAN) NORTHERN MISSISSIPPI EMBAYMENT by SANDY M. EBERSOLE A DISSERTATION Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Geological Sciences in the Graduate School of The University of Alabama TUSCALOOSA, ALABAMA 2009 Copyright Sandy M. Ebersole 2009 ALL RIGHTS RESERVED ABSTRACT Most paleogeographic and paleoenvironmental reconstructions of the northern Mississippi Embayment during the Late Campanian (Late Cretaceous) illustrate a generalized gulf between central Mississippi and Arkansas stretching northward into southern Illinois. The most detailed reconstruction shows a large river flowing from the Appalachians to the northeastern edge of the gulf with a river delta covering most of the northern embayment and stretching from southern Illinois to west-central Alabama. Lack of age constraints, incorrect stratigraphic correlations, paucity of detailed geologic maps and subsurface data, and misunderstanding of the basin geometry have led to inaccurate or vague paleogeographic interpretations of the Upper Cretaceous northern Mississippi Embayment. This project correlates the marine and nonmarine biostratigraphy, identifies the upper Campanian lithofacies, interprets the paleoenvironment of each lithofacies, and maps these interpretations to create a paleogeographic model of the northern Mississippi Embayment during the Late Campanian. Biostratigraphic indicators used in this project include -
ABHANDLUNGEN DER GEOLOGISCHEN BUNDESANSTALT Abh
©Geol. Bundesanstalt, Wien; download unter www.geologie.ac.at ABHANDLUNGEN DER GEOLOGISCHEN BUNDESANSTALT Abh. Geol. B.-A. ISSN 0016–7800 ISBN 3-85316-14-X Band 57 S. 157–165 Wien, Februar 2002 Cephalopods – Present and Past Editors: H. Summesberger, K. Histon & A. Daurer Morphological Diversity of the Jaws of Cretaceous Ammonoidea KAZUSHIGE TANABE & NEIL H. LANDMAN*) 3 Text-Figures, 1 Table and 1 Plate Cretaceous Ammonoidea Taxonomy Functional Morphology Contents Zusammenfassung ...................................................................................................... 157 Abstract ................................................................................................................. 157 1. Introduction ............................................................................................................. 158 2. Data Sources ............................................................................................................ 158 3. Description of the Jaws of Cretaceous Ammonoids ........................................................................ 159 3.1. Recognition of Upper and Lower Jaw ................................................................................ 159 3.2. Phylloceratina ...................................................................................................... 159 3.3. Recognition of Upper and Lower Jaw ................................................................................ 159 3.4. Ammonitina ....................................................................................................... -
The Molluscan and Brachiopod Fauna of the Late Cretaceous Pierre Shale
University of South Florida Scholar Commons Graduate Theses and Dissertations Graduate School 2007 The molluscan and brachiopod fauna of the Late Cretaceous Pierre Shale (Baculites compressus/ Baculites cuneatus biozones) near Kremmling, Colorado Lanora Ann Sava University of South Florida Follow this and additional works at: http://scholarcommons.usf.edu/etd Part of the American Studies Commons Scholar Commons Citation Sava, Lanora Ann, "The molluscan and brachiopod fauna of the Late Cretaceous Pierre Shale (Baculites compressus/Baculites cuneatus biozones) near Kremmling, Colorado" (2007). Graduate Theses and Dissertations. http://scholarcommons.usf.edu/etd/2354 This Thesis is brought to you for free and open access by the Graduate School at Scholar Commons. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Scholar Commons. For more information, please contact [email protected]. The Molluscan and Brachiopod Fauna of the Late Cretaceous Pierre Shale (Baculites compressus/Baculites cuneatus biozones) near Kremmling, Colorado by Lanora Ann Sava A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science Department of Geology College of Arts and Sciences University of South Florida Major Professor: Peter J. Harries, Ph.D. Eric A. Oches, Ph.D. Gregory S. Herbert, Ph.D. Date of Approval: May 25, 2007 Keywords: paleontology, Campanian, ammonite, bivalves, Western Interior Seaway © Copyright 2007, Lanora Ann Sava Every journey begins with a simple plan – to travel along our path until we reach the destination. Along the way we may come across fellow travelers, maps and sometimes sideroads or shortcuts that influence the direction and outcome of our travels. -
Late Cretaceous) and Cephalopod-Based Correlations with North America
Netherlands Journal of Geosciences — Geologie en Mijnbouw | 84 – 3 | 283 - 301 | 2005 Stratigraphic ranges of mosasaurs in Belgium and the Netherlands (Late Cretaceous) and cephalopod-based correlations with North America J.W.M. Jagt Natuurhistorisch Museum Maastricht, de Bosquetplein 6-7, NL-6211 KJ Maastricht, the Netherlands. Email: [email protected] Manuscript received: November 2004; accepted: March 2005 Abstract Mosasaur taxa currently known from Campanian-Maastrichtian strata in the Liège-Limburg (SE Netherlands, NE Belgium) and Mons (southern Belgium) basins are listed and briefly discussed and their stratigraphic ranges indicated. Recently published and/or ongoing work on coleoid and ammonoid cephalopods in these areas allows tie points between NW Europe and the United States (Western Interior, Gulf Coast, Atlantic Seaboard) to be established. Future studies need to refine the resultant, rather crude, scheme. The ultimate aim is a more robust picture of mosasaur taxonomy, biostratigraphy and palaeobiogeography, and a detailed evaluation of migratory patterns across the Atlantic. Keywords: Mosasauridae, Late Cretaceous, Campanian, Maastrichtian, biostratigraphy, palaeobiogeography, correlation, cephalopods Introduction Interior, Belemnitella bulbosa ranges from the Hoploscaphites birkelundae to Jeletzkytes nebrascensis zones (Fox Hills Forma- To date, at least eight species of mosasaur have been recorded tion, South Dakota), and possibly also occurs in the Baculites from strata of Campanian-Maastrichtian age in the extended -
Large Scaphitid Ammonites (Hoploscaphites) from the Upper Cretaceous (Upper Campanian–Lower Maastrichtian) of North America: Endless Variation on a Single Theme
LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME NEIL H. LANDMAN, W. JAMES KENNEDY, JOYCE GRIER, NEAL L. LARSON, JAMES W. GRIER, THOMAS LINN, LYDIA TACKETT, AND BRIAN R. JICHA BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME NEIL H. LANDMAN Department of Invertebrate Paleontology, American Museum of Natural History, New York W. JAMES KENNEDY Oxford University Museum of Natural History, Oxford JOYCE GRIER NEAL L. LARSON Larson Paleontology Unlimited, Keystone, South Dakota JAMES W. GRIER Department of Biological Sciences, North Dakota State University, Fargo THOMAS LINN Early Earth Enterprises, Glendive, Montana LYDIA TACKETT Department of Geosciences, North Dakota State University, Fargo BRIAN R. JICHA Department of Geoscience, University of Wisconsin, Madison BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY Number 441, 131 pp., 78 figures, 6 tables Issued September 14, 2020 Copyright © American Museum of Natural History 2020 ISSN 0003-0090 FRONTISPIECE. Breaks along the Yellowstone River (background) exposing the Upper Cretaceous Pierre Shale on the Cedar Creek Anticline, Dawson County, Montana. This is one of the classic sites first explored by Ferdinand V. Hayden during the 1850s, and the source of some of the largest species of Hoploscaphites in North America. -
Late Maastrichtian and Earliest Danian Scaphitid Ammonites from Central Europe: Taxonomy, Evolution, and Extinction
Late Maastrichtian and earliest Danian scaphitid ammonites from central Europe: Taxonomy, evolution, and extinction MARCIN MACHALSKI Machalski, M. 2005. Late Maastrichtian and earliest Danian scaphitid ammonites from central Europe: Taxonomy, evo− lution, and extinction. Acta Palaeontologica Polonica 50 (4): 653–696. Late Maastrichtian and earliest Danian scaphitid ammonites from key sections in the Maastricht area in the Netherlands and Belgium, Hemmoor in Germany, Stevns Klint (Sjælland) and Jylland in Denmark, the Lublin Upland in Poland and Lviv in the Ukraine, are studied. In total, thirteen scaphitid taxa are recognised: Hoploscaphites constrictus lvivensis subsp. nov., H. c. crassus, H. c. johnjagti subsp. nov., H. tenuistriatus, H. pungens, H. schmidi, H. sp. ex gr. pungens–schmidi, H. felderi, H. sp. ex gr. waagei–angmartussutensis, Acanthoscaphites (Euroscaphites) varians varians, A. (E.) varians blaszkiewiczi, A. (E.?) verneuilianus and A.(E.?) sp. aff. verneuilianus. Sexual dimorphism is demonstrated for several species. Addition− ally, developmental polymorphism of males is proposed to explain a size−dependent variation of ornament in microconchs of H. c. crassus. The extinction pattern of European scaphitids is difficult to assess for methodological reasons. The avail− able data indicate, however, that the Hoploscaphites constrictus lineage survived unaffected until the very end of the Creta− ceous and even crossed the Cretaceous–Paleogene (K–Pg) boundary. The latest Maastrichtian populations of this lineage, assigned to H. c. johnjagti subsp. nov., are dominated by individuals with pronounced ribbing and tuberculation of the body chamber. This may reflect increased predation pressure, indirectly related to the late Maastrichtian regression. The succes− sive members of the Hoploscaphites constrictus lineage, i.e., Hoploscaphites constrictus lvivensis subsp. -
A New Species of Hoploscaphites (Ammonoidea, Ancyloceratina) from Cold Methane Seeps in the Upper Cretaceous of the U.S. Western
AMERICAN MUSEUM NOVITATES Number 3781, 39 pp. September 23, 2013 A new species of Hoploscaphites (Ammonoidea: Ancyloceratina) from cold methane seeps in the Upper Cretaceous of the U.S. Western Interior NEIL H. LANDMAN,1 W. JAMES KENNEDY,2 WILLIAM A. COBBAN,3 NEAL L. LARSON,4 AND STEVEN D. JORGENSEN5 ABSTRACT We describe Hoploscaphites gilberti, n. sp. (Ammonoidea: Ancyloceratina), from the Upper Cretaceous (middle-upper Campanian) Pierre Shale spanning the zones of Baculites scotti and Didymoceras nebrascense in Colorado, Wyoming, Montana, and South Dakota. This species is strongly dimorphic and is characterized by a compressed whorl section, with a rounded to elongate outline in lateral view. The apertural angle is approximately 50° in macroconchs. The body chamber is ornamented with fine flexuous ribs, umbilicolateral bullae, and ventrolateral tubercles. Hoploscaphites gilberti, n. sp., most closely resembles H. gilli Cobban and Jeletzky, 1965, but differs from this species in several important features: (1) the flanks of the body chamber are nearly subparallel rather than steeply convergent toward the venter, (2) the ven¬ trolateral tubercles are larger and more numerous, and (3) the ribs are more widely spaced. Hoploscaphites gilberti, n. sp., is abundant at “tepee buttes” in the Pierre Shale, which are now interpreted as cold methane seeps. 1 Division of Paleontology (Invertebrates), American Museum of Natural History. 2 Oxford University Museum of Natural History, Parks Road, Oxford, 0X1 3PW, United Kingdom. 3 Division of Paleontology (Invertebrates), American Museum of Natural History. 4 Larson Paleontology, PO Box 1313, Hill City, SD 57745. 5 315 Brentford Circle, Highlands Ranch, CO 80126. Copyright © American Museum of Natural History 2013 ISSN 0003-0082 2 AMERICAN MUSEUM NOVITATES NO. -
Aptychi Microstructure in Late Cretaceous Ancyloceratina (Ammonoidea)
Aptychi microstructure in Late Cretaceous Ancyloceratina (Ammonoidea) ISABELLE KRUTA, ISABELLE ROUGET, NEIL H. LANDMAN, KAZUSHIGE TANABE AND FABRIZIO CECCA Kruta, I., Rouget, I., Landman, N.H., Tanabe, K. & Cecca, F. 2009: Aptychus micro- structure in Late Cretaceous Ancyloceratina (Ammonoidea). Lethaia, Vol. 42, pp. 312– 321. The microstructure of aptychi (bivalved calcareous coverings on lower jaws) of three genera of Late Cretaceous Ancyloceratina, Baculites, Polyptychoceras and Jeletzkytes is described for the first time on the basis of well-preserved and in situ material from the Western Interior of the USA and Hokkaido, Japan. Optical and scanning electron microscope observations of aptychi on polished median and cross-sections reveal some variation in their relative size, shape and microstructure among the three genera. The aptychus of Baculites is composed of two calcitic layers: one with tilted lamellae and the other one with horizontal lamellae, whereas those of Polyptychoceras and Jeletzkytes consist of a thin layer with horizontal lamellae. Comparison with aptychi (e.g. Laevap- tychus) of Jurassic Ammonitina shows that the aptychi of Ancyloceratina differ from those of Jurassic Ammonitina in the smaller number of layers and the absence of a sponge-like structure. We propose for the first time growth models for a sponge-like aptychus of Jurassic Ammonitina and the lamellar aptychus of Cretaceous Ancylocer- atina. The remarkable microstructural variation of aptychi observed in Mesozoic Ammonoidea is probably related to the diversity -
THE LATE CAMPANIAN (UPPER CRETACEOUS) CEPHALOPOD FAUNA of the COON CREEK FORMATION at the TYPE LOCALITY ______Neal L
The Journal of Paleontological Sciences: JPS.H.2012.01 THE LATE CAMPANIAN (UPPER CRETACEOUS) CEPHALOPOD FAUNA OF THE COON CREEK FORMATION AT THE TYPE LOCALITY _____________________________________________________________________________________________________________________ Neal L. Larson Black Hills Institute of Geological Research, PO Box 643, 117 Main Street, Hill City, SD 57745 & Black Hills Museum of Natural History, PO Box 614, Hill City, South Dakota, USA 57745 <[email protected]> _____________________________________________________________________________________________________________________ Abstract: There is an unusually rich, Late Campanian (Upper Cretaceous), molluscan fauna from the Coon Creek Formation at its type locality, 7 1/2 miles north of Adamsville, McNairy County, Tennessee. The ammonite fauna is a typical, late Campanian, Gulf Coast fauna consisting almost entirely of aberrant ammonites and only one tightly coiled, planispiral form. A few authors have published on the fauna from this locality, most notably Bruce Wade, who published on the entire known fauna; Norman Sohl, who published on the gastropods; Cobban and Kennedy who published on the ammonites; and Brister and Young, who published an overview on the fauna and history of Coon Creek at the type locality from the extensive collections made by the Pink Palace Museum. Except for Discoscaphites the ammonite fauna from this locality compares both at a species level and stratigraphically with the fauna from the Nacatoch Sand in Kaufman and Navarro Counties of Texas (Stephenson, 1941). Except for Discoscaphites nearly all of the ammonite fauna also correlates to the Baculites cuneatus through Baculites jenseni Zones of the Pierre and Bearpaw Shales in the Western Interior, most notably to that from the Middle Park and Fort Collins area of Colorado as reported by Kennedy et al.