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    Wyświetlanie 1-5 z 5
    Tytuł:
    Acorn barnacles (Crustacea, Thoracica, Balanomorpha) from the Eocene and Oligocene of the Isle of Wight and Hampshire (United Kingdom) and Manche, northern France
    Autorzy:
    Gale, Andrew Scott
    Powiązania:
    https://bibliotekanauki.pl/articles/1835598.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acorn barnacles
    Paleogene
    northwest Europe
    New taxa
    paleogen
    północno-zachodnia Europa
    nowy takson
    Opis:
    Balanomorph cirripedes from the Eocene–Oligocene of the Hampshire Basin (United Kingdom) and the Middle Eocene of the Cotentin Peninsula, Manche (France) are described. A new genus, Vectibalanus, is founded, with the type species Balanus unguiformis J. de C. Sowerby, 1846; assigned to this are also Balanus erisma J. de C. Sowerby, 1846 and Vectibalanus mortoni sp. nov. In addition, a new species of Lophobalanus Zullo, 1984, L. fresvillensis sp. nov., is described. This is the first record of that genus from outside the eastern USA and the oldest species known to date. Cladistic analysis of 24 morphological characters suggests that Vectibalanus unguiformis is sister taxon to a group comprising the most derived balanomorph taxa, and thus represents an important transition in the evolution of the group, with the initiation of development of a complex parietal wall structure. Vectibalanus unguiformis was evidently adapted to low salinity habitats (10-30 ppt), and is the oldest known brackish water barnacle. The other species (V. erisma, V. mortoni sp. nov.) occupied more clearly marine environments (>30 ppt). Balanomorph barnacles appeared simultaneously in the Priabonian (Upper Eocene) of the Gulf and Atlantic seaboards of the USA and northwest Europe, which probably represents a northerly migration from Tethys.
    Źródło:
    Acta Geologica Polonica; 2021, 71, 2; 153-174
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Redox conditions, glacio-eustasy, and the status of the Cenomanian-Turonian Anoxic Event: new evidence from the Upper Cretaceous Chalk of England
    Autorzy:
    Jeans, Christopher V.
    Wray, David S.
    Williams, C. Terry
    Bland, David J.
    Wood, Christopher J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835600.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cretaceous
    Cenomanian–Turonian Anoxic Event
    eustatic lithocycles
    glacial associations
    redox conditions
    cerium anomalies
    carbon isotopes
    NW Europe
    Japan
    kreda
    cenoman
    turon
    asocjacje
    redoks
    izotopy węgla
    północno-zachodnia Europa
    Japonia
    Opis:
    The nature of the Cenomanian–Turonian Oceanic Anoxic Event (CTOAE) and its δ13 C Excursion is considered in the light of (1) the stratigraphical framework in which the CTOAE developed in the European shelf seas, (2) conclusions that can be drawn from new detailed investigations of the Chalk succession at three locations in England, at Melton Ross and Flixton in the Northern Province where organic-rich ‘black bands’ are present, and at Dover in the Southern Province (part of the Anglo-Paris Basin) where they are absent, and (3) how these conclusion fit in with the present understanding of the CTOAE. The application of the cerium anomaly method (German and Elderfield 1990) at Dover, Melton Ross and Flixton has allowed the varying palaeoredox conditions in the Chalk Sea and its sediments to be related to the acid insoluble residues, organic carbon, δ18O (calcite), δ13C (calcite), δ13C (organic matter), Fe 2+ and Mn2+ (calcite), and P/TiO2 (acid insoluble residue). This has provided evidence that the initial stages of the δ13C Excursion in England were related to (1) a drop of sea level estimated at between 45 and 85 metres, (2) influxes of terrestrial silicate and organic detritus from adjacent continental sources and the reworking of exposed marine sediments, and (3) the presence of three cold water phases (named the Wood, Jefferies and Black) associated with the appearance of the cold-water pulse fauna during the Plenus Cold Event. Conditions in the water column and in the chalk sediment were different in the two areas. In the Northern Province, cerium-enriched waters and anoxic conditions were widespread; the δ13C pattern reflects the interplay between the development of anoxia in the water column and the preservation of terrestrial and marine organic matter in the black bands; here the CTOAE was short-lived (~0.25 Ma) lasting only the length of the Upper Cenomanian Metoicoceras geslinianum Zone. In the Southern Province, water conditions were oxic and the δ13C Excursion lasted to the top of the Lower Turonian Watinoceras devonense Zone, much longer (~1.05 Ma) than in the Northern Province. These differences are discussed with respect to (1) the Cenomanian–Turonian Anoxic Event (CTAE) hypothesis when the ocean-continent-atmosphere systems were linked, (2) limitations of chemostratigraphic global correlation, and (3) the Cenomanian-Turonian Anoxic Event Recovery (CTOAER), a new term to define the varying lengths of time it took different oceans and seas to recover once the linked ocean-continent-atmosphere system was over. The possibility is considered that glacio-eustasy (the glacial control hypothesis of Jeans et al. 1991) with the waxing and waning of polar ice sheets, in association with the degassing of large igneous provinces, may have set the scene for the development of the Cenomanian-Turonian Anoxic Event (CTAE).
    Źródło:
    Acta Geologica Polonica; 2021, 71, 2; 103-152
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Episkeletozoans and bioerosional ichnotaxa on isolated bones of Late Cretaceous mosasaurs and cheloniid turtles from the Maastricht area, the Netherlands
    Autorzy:
    Jagt, John W.M.
    Deckers, Mart J.M.
    De Leebeeck, Magda
    Donovan, Stephen K.
    Nieuwenhuis, Eric
    Powiązania:
    https://bibliotekanauki.pl/articles/94251.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    reptile
    epizoans
    dentalites
    Maastrichtian
    northwest Europe
    gad
    epistrefy
    Mastrycht
    północno-zachodnia Europa
    Opis:
    Isolated bones of three taxa of marine reptiles (Mosasaurus hoffmannii Mantell, Plioplatecarpus marshi Dollo and Allopleuron hofmanni (Gray)) from various levels within the Maastricht Formation (upper Maastrichtian) at the former ENCI-Heidelberg Cement Group quarry (Maastricht, the Netherlands) exhibit bioerosional traces and encrustation. Episkeletozoans include dimyid, ostreid and monopleurid bivalves, at least three species of cheilostome and cyclostome bryozoans and two adnate calcareous foraminifera. The bones show biting traces (Gnathichnus pentax Bromley, Linichnus cf. serratus Jacobsen & Bromley and Machichnus isp.), as well as borings. The latter may be referred to Karethraichnus lakkos Zonneveld, Bartels, Gunnell & McHugh, which is here considered to be a junior synonym of Gastrochaenolites isp.
    Źródło:
    Geologos; 2020, 26, 1; 39-49
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The erratic rocks of the Upper Cretaceous Chalk of England: how did they get there, ice transport or other means?
    Autorzy:
    Jeans, Christopher V.
    Platten, Ian M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835594.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cretaceous
    chalk
    erratics
    gastroliths
    fast ice
    palaeogeography
    NW Europe
    kreda
    eratyk
    stały lód brzegowy
    paleogeografia
    Europa północno-zachodnia
    Opis:
    Rare erratic clasts - extraneous rock types - occur in the Upper Cretaceous Chalk, including a local basal facies, the Cambridge Greensand. The underlying Upper Albian Gault Clay and the Hunstanton Red Chalk Formations have also yielded erratics. The discovery of these erratics, their description and the development of hypotheses to explain their origins and significance are reviewed. They became the subject of scientific interest with the interpretation of a particularly large example “The Purley Boulder” by Godwin-Austen (1858) as having been transported to its depositional site in the Chalk Sea by drifting coastal ice. Thin section petrography (1930–1951) extended knowledge of their diverse provenance. At the same time the Chalk Sea had become interpreted as warm, so drifting ice was considered out of context, and the preferred agents of transport were entanglement in the roots of drifting trees, as holdfasts of floating marine algae, or as stomach stones of marine reptiles or large fish. Reconsideration of their occurrence, variable nature and sedimentary setting suggests that there are three zones in the English Chalk where erratics may be less rare (1) near the base of the Cenomanian in the Cambridge area, (2) the Upper Cenomanian-Middle Turonian in Surrey, and (3) the Upper Coniacian and Lower Santonian of Kent. The assemblage from each level and their sedimentary setting is subtly different. Present evidence suggests that the erratics found in the Upper Albian-Lower Cenomanian and the Upper Cenomanian-Middle Turonian zones represent shallow water and shoreline rocks that were transported into the Chalk Sea by coastal ice (fast-ice) that enclosed coastal marine sediments as it froze. The Upper Coniacian and Lower Santonian erratics from Rochester and Gravesend in Kent are gastroliths.
    Źródło:
    Acta Geologica Polonica; 2021, 71, 3; 287-304
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seine Gateway® at the heart of North-Western European freight flows: regional dynamics and current challenges
    Seine Gateway® w centrum północno-zachodnich europejskich przepływów towarowych: regional-na dynamika oraz aktualne wyzwania
    Autorzy:
    Duszynski, Juliette
    Audievre, Lucile
    Mus, Mathilde
    Mary, Jean-Francois
    Powiązania:
    https://bibliotekanauki.pl/articles/540956.pdf
    Data publikacji:
    2015
    Wydawca:
    Wyższa Szkoła Bankowa we Wrocławiu
    Tematy:
    Seine Gateway®,
    sustainable logis-tics,
    freight transport,
    North-Western Europe,
    hinterland,
    infrastructures
    JEL N74,
    O18,
    R42
    zrównoważona logistyka,
    transport towarowy,
    północno-zachodnia Europa, infrastruktura
    Opis:
    In the context of global freight flows and increased competition between ports, this article deals with the question how the Seine River Valley and its ports rate in the European geogra-phy of exchanges of saleable goods. It is discussed what transport infrastructures the Seine River Valley has and what opportunities will need to have to confront the stakes involved in development. The strategic position of Le Havre, the first importation port, upstream from the Pas-de-Calais strait and Paris’ natural maritime inbound port, raises the question of the intensification of East-West exchanges that logically will accompany the shift of Europe’s cen-tre of gravity towards the East. The authors present what measure the Seine Gateway® con-stitutes an adapted response to massify the flows of freight in the Seine River Valley area and to enlarge its hinterlands.
    W kontekście globalnych przepływów towarowych i wzrostu konkurencji między portami, ni-niejszy artykuł stanowi swoistą próbę odpowiedzi na pytanie w jaki sposób dolina rzeki Se-kwany oraz porty zlokalizowane wzdłuż niej wpływają na zasięg europejskiej geograficznej wymiany towarów. W artykule omawiany jest stan infrastruktury transportowej rzeki Sekwa-ny oraz kwestia możliwości, z którymi trzeba się zmierzyć w celu doprowadzenia do jej roz-woju. Strategiczne położenie pierwszego naturalnego portu przywozu w dolinie rzeki – Haw-re, rodzi pytanie o intensyfikację wymiany Wschód-Zachód jako logicznego przesunięcie cen-trum Europy w kierunku Wschodu. Autorzy podejmują próbę odpowiedzi na pytanie czy ustanowienie Seine Gateway® prowadzi do zintensyfikowania przepływów towarowych w głąb lądu w obszarze doliny rzeki Sekwany.
    Źródło:
    Zeszyty Naukowe Wyższej Szkoły Bankowej we Wrocławiu; 2015, Sustainable TSL; 5-23
    1643-7772
    Pojawia się w:
    Zeszyty Naukowe Wyższej Szkoły Bankowej we Wrocławiu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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