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  • 1
    Online Resource
    Online Resource
    100 Jahre Hermann Credner-Stiftung der Deutschen Gesellschaft für Geowissenschaften : Beiträge des Festkolloquiums am 4. und 5. November 2011 in Leipzig. (2011)
    Stuttgart :Schweizerbart,
    Details
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (70 pages)
    Edition: 1st ed.
    ISBN: 9783510492756
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=7244029
    Language: German
    Note: Cover -- Titel -- Impressum -- Inhalt -- Grußwort -- Carl Hermann Credner (1841 - 1913) - Leben und Wirken / Franz Jacobs, Jan-Michael Lange, Michael Börngen, Frank Bach -- 100 Jahre Hermann Credner-Stiftung / Heinz-Gerd Röhling -- Hermann Credner in Leipzig. Eine Exkursion zu seinen Lebens- und Wirkungsstätten / Frank Bach, Michael Börngen, Jan-Michael Lange -- 3D seismic analysis of tectonically controlled sedimentation in the Chalk Group, southern Danish North Sea / Stefan Back -- Das zentraleuropäische Becken im Model / Ulf Bayer, Yuriy Maystrenko -- Kein "Schneeball-Erde" im Neoproterozoikum / Thilo Bechstädt, Hartmut Jäger -- Liefergebietsrekonstruktionen mit Hilfe von Tonmineralvergesellschaftungen in Sedimenten des antarktischen Kontinentalrandes / Werner Ehrmann, Claus-Dieter Hillenbrand, James A. Smith, Alastair G.C. Graham, Robert D. Larter, Gerhard Kuhn -- Broadband approach to quantification of lithospheric deformation on scales ranging from Earthquakes to fault systems / Anke Maria Friedrich -- Das Rotliegend-Profil der Bohrung Querfurt 1/64 und das Alter der Hornburg-Formation / Ute Gebhardt -- Zeitliche (In)Variabilität von Erosionsraten in den Westalpen / Christoph Glotzbach, Peter van der Beek, Matthias Bernet, Wolfgang Frisch, Cornelia Spiegel -- Anoxische Ozeane und Riffkrisen im kreidezeitlichen Treibhaus / Ulrich Heimhofer, Stefan Huck, Niels Rameil, Stephane Bodin, Adrian Immenhauser -- Stratigraphische Sequenzen und Bioevents im Kulmbecken des Rheinischen Schiefergebirges (Mississippium, Deutschland) / Hans-Georg Herbig -- Postglaziale Erdbeben in Nordostdeutschland / Gösta Hoffmann, Klaus Reicherter -- Die Geologie und die Städte / Andreas Hoppe -- Devonische Konturite zwischen Gondwana und Laurussia - paläoozeanographische und plattentektonische Implikationen / Heiko Hüneke. , Late Quaternary variations of the Southern Westerly Wind Belt and its influences on glacier extend, ecosystems, ocean currents as well as the relationship to the global climate network / Rolf Kilian -- „Saxonische Tektonik" im 21. Jahrhundert: Völlig veraltet oder noch ein brauchbarer Begriff? / Jonas Kley -- Prograd metamorphe Gold-Quarzgänge der Paamiut Goldprovinz, Südwest-grönland: Sind sie Teil des Systems orogener Goldlagerstätten? / Jochen Kolb -- Neue Perspektiven moderner Texturanalytik für Strukturgeologie und Petrophysik / Bernd Leiss -- Der Schatz im Vansee (Südost-Anatolien): Ein Klimaarchiv der letzten 500 000 Jahre / Thomas Litt -- Maar-Diatrem-Vulkane, ihre Bildung und Bedeutung / Volker Lorenz -- Subduktionserosion: ein Lehrbuchbeispiel am mittelamerikanischen Plattenrand / Martin Meschede -- Geo-Öffentlichkeitsarbeit - vom Fremdwort zur (an-)erkannten Aufgabe (?) / J. H. Schroeder -- Th-U-Pb-Altersbestimmung von Monazit mit der Elektronenstrahl-Mikrosonde und Anwendungspotential in Metamorphiten und Magmatiten / Bernhard Schulz -- Magnetisierbarkeit fluviatiler Sedimente in Deutschland - FluviMag / Michael Pirrung, Dirk Merten, Hannes Grobe -- Folding and boudinage in three dimensions: Results from analogue modeling using power-law rock analogues / Gernold Zulauf.
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  • 2
    Book
    Book
    Die känozoische Vereisungsgeschichte der Antarktis : = Cenozoic glacial history of Antarctica (1994)
    Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung
    Details Availability
    Keywords: Hochschulschrift ; Antarktis ; Vereisung ; Känozoikum ; Antarktis ; Vereisung ; Känozoikum
    Type of Medium: Book
    Pages: 152 S. , Ill., graph. Darst.
    Series Statement: Berichte zur Polarforschung 137
    URL: https://www.gbv.de/dms/tib-ub-hannover/153240474.pdf
    DDC: 551.7/8/0998
    RVK:
    RY 20075
    RVK:
    RY 20396
    Language: German
    Note: Literaturverz. S. 138 - 152 , Intermediärsprache: Englisch , Zugl.: Bremen, Univ., Habilschr., 1993
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  • 3
    Book
    Book
    History of Mesozoic and Cenozoic sediment fluxes to the North Atlantic Ocean (1985)
    Stuttgart : Schweizerbart
    Details Availability
    Type of Medium: Book
    Pages: 109 S. , graph. Darst., Kt
    ISBN: 3510570154
    Series Statement: Contributions to sedimentology 15
    URL: http://d-nb.info/860519597/04
    DDC: 551.7/6/091631
    Language: English
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  • 4
    Book
    Book
    Sedimentzusammensetzung, Sedimentations- und Akkumulationsraten im Nordatlantik : Bohrergebnisse des Deep-Sea Drilling Project 〈Datensammlung〉 ; [Mit dt. u. engl. Zsfassung.] = Sediment composition, sedimentation and accumulation rates in the North Atlantic Ocean (1986)
    Kiel : Geolog.-Paläontolog. Inst. u. Museum, Christian-Albrechts-Univ.
    Details Availability
    Type of Medium: Book
    Pages: 201 S. , Kt. , 30 cm
    Series Statement: Berichte / Geologisch-Paläontologisches Institut und Museum, Christian-Albrechts-Universität Kiel FR Germany Nr. 16
    Language: German , English
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  • 5
    Book
    Book
    Zum Sedimenteintrag in das zentrale nordwesteuropäische Oberkreidemeer (1986)
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Book
    Pages: 163 S , Ill., graph. Darst., Kt
    Language: German
    Note: Kiel, Univ., Diss. : 1986
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  • 6
    Book
    Book
    Zum Sedimenteintrag in das zentrale nordwesteuropäische Oberkreidemeer : mit 10 Tabellen und 16 Tabellen im Anhang (1986)
    Stuttgart : Schweizerbart
    Details Availability
    Type of Medium: Book
    Pages: 139 S. , Ill., graph. Darst.
    Series Statement: Die Maastricht-Stufe in NW-Deutschland : Beiträge zum Schwerpunktprogramm der Deutschen Forschungsgemeinschaft "Geologische Korrelationsforschung" Teil 7
    Language: German , English
    Note: Mit engl. und russ. Zsfassung
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  • 7
    Electronic Resource
    Electronic Resource
    Correlation of terrigenous and biogenic sediment fluxes in the North Atlantic Ocean during the past 150 my (1986)
    Springer
    International journal of earth sciences 75 (1986), S. 43-55 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The depositional history of the North Atlantic Ocean is described on the basis of about 120 deep-sea drill sites. Sediment fluxes were quantified by calculating accumulation rates (g·cm−2·my−1) of terrigenous and calcareous biogenic sediment components. They were plotted versus an absolute time scale, into palinspastic maps and into age versus paleodepth diagrams. Dominantly terrigenous deposits fill the deeper parts of the western and eastern subbasins of the North Atlantic Ocean, because of the depth-dependent dissolution of calcium carbonate. Along the continental margins they are mixed with biogenic calcareous and siliceous components. Temporal maxima in the terrigenous sediment input occurred in the Late Jurassic to Early Cretaceous time interval and from Middle Miocene to Recent times. High carbonate fluxes are also found in the Jurassic and Early Cretaceous and in the Neogene. The accumulation rates remained modest over most of the time in between. High fluxes are mainly restricted to the continental margins and to a minor extent to the Mid-Atlantic Ridge. The distribution patterns of calcareous material in the deepsea indicate large-scale sediment displacements. Input rates of terrigenous and biogenic calcareous materials seem to have varied simultaneously for long time intervals suggesting a causal relationship. They indicate a uniform depositional environment until Early Cretaceous. Then the North Atlantic Ocean differentiated into an eastern and western subbasin with their own depositional environments, which varied according to latitude and paleodepth.
    Abstract: Résumé L'histoire sédimentaire de l'Atlantique Nord a été reconstituée à partir de quelque 120 forages en mer profonde. Afin de quantifier l'apport sédimentaire, le taux d'accumulation (en gr·cm−2·ma−1) a été calculé pour les composants terrigénes d'une part et biogéniques calcaires d'autre part. Ces taux ont été reportés en fonction d'une échelle d'âges absolus sur des cartes palynspastiques et dans des diagrammes de paléo-profondeur. Les parties les plus profondes des bassins oriental et occidental de l'Atlantique Nord sont remplies par des dépôts de composition terrigéne dominante, en conséquence de la dissolution des carbonates sous la profondeur de compensation. Le long des marges continentales, les dépôts sont mêlés de composants biogéniques carbonatés et siliceux. Des maxima temporaires dans les apports terrigénes se marquent pendant les intervalles Jurassique supérieur -Crétacé inférieur et Miocène moyen-Récent. Une abondante sédimentation carbonatée s'est produite également du Jurassique au Crétacé inférieur ainsi qu'au Néogéne.Pendant la période intermédiaire, les taux d'accumulation du CaCO3 sont, en général restés faibles, les valeurs élevées restant localisées principalement sur les marges continentales et, dans une moindre mesure, sur la crête médiatlantique. La distribution du matériau calcaire en mer profonde indique des remaniements à grande échelle des sédiments. Les taux d'accumulation des matérieux terrigénes et biogéniques calcaires semblent présenter des variations simultanées au cours de longues périodes, ce qui suggère une cause commune. Ils indiquent un milieu de dépôt uniforme jusqu'au Crétacé inférieur. Ensuite, l'Atlantique Nord s'est différencié en deux bassins — oriental et occidental — possédant chacun ses propres conditions de milieu, variables en fonction de la latitude et de la paléoprofondeur.
    Notes: Zusammenfassung Die Ablagerungsgeschichte des Nordatlantischen Ozeans wurde auf der Grundlage von etwa 120 DSDP-Tiefseebohrungen rekonstruiert. Um den Sedimenteintrag zu quantifizieren, wurden Akkumulationsraten (in g·cm−2· my−1) für die terrigenen und biogenen kalkigen Sedimentkomponenten berechnet. Sie wurden gegen eine absolute Zeitskala aufgetragen, in palinspastischen Karten und in Alter/Paläotiefen-Diagrammen dargestellt. Ablagerungen hauptsächlich terrigener Zusammensetzung füllen die tieferen Teile der westlichen und östlichen Teilbecken des Nordatlantiks, da die kalkigen Sedimentkomponenten aufgrund einer CCD oberhalb des Beckenbodens aufgelöst wurden. Entlang der Kontmentalränder sind sie mit biogenen kalkigen und kieseligen Komponenten vermischt. Zeitliche Maxima im Eintrag terrigener Sedimentpartikel treten vom Späten Jura bis zur Frühen Kreide und vom Mittelmiozän bis heute auf. Hohe Karbonatsedimentation fand ebenfalls vom Jura bis zur Frühen Kreide und im Neogen statt. In der dazwischenliegenden Zeit blieben die CaCO3-Akkumulationsraten im allgemeinen gering. Hohe Akkumulationsraten waren vor allem auf die Kontinentalränder und, in geringerem Maße, auf den Mittelatlantischen Rücken beschränkt. Die Verteilungsmuster von Kalziumkarbonat in der Tiefsee weisen auf großräumige Sedimentumlagerungen hin. Akkumulationsraten terrigenen und biogenen kalkigen Materials scheinen sich über lange Zeiträume hinweg gleichzeitig geändert zu haben und deuten auf eine ursächliche Beziehung zwischen den beiden Komponenten hin. Sie belegen ein gleichförmiges Ablagerungsmilieu bis zur Frühen Kreide. Danach differenzierte sich der Nordatlantik in ein östliches und ein westliches Teilbecken, die je nach geographischer Breite und nach Paläotiefenverhältnissen ihr eigenes Ablagerungsmilieu entwickelten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01770177
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  • 8
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    Analysis of Sedimentary Facies Using Bulk Mineralogic Characteristics in Cretaceous to Quaternary Sediments from the Kerguelen Plateau: Sites 737, 738, and 744 (1991)
    In:  Proceedings of the Ocean Drilling Program: Scientific Results, 119 . pp. 211-223.
    Details
    Publication Date: 2016-02-15
    Description: Carbonate-free portions of Upper Cretaceous to Holocene sediment samples from the Kerguelen Plateau in the southern Indian Ocean were investigated by X-ray diffraction. Downhole variations in the content of opal-A, opal-CT, quartz, feldspar, barite, and clinoptilolite were studied at Site 737 on the northern Kerguelen Plateau and at Sites 744 and 738 on the southern Kerguelen Plateau. The variation of these components reflects temporal changes in the depositional history of the Kerguelen Plateau as well as major differences in the sedimentary evolution between the northern plateau and the southern plateau. Carbonate is the dominant component in the pelagic sediments on the Kerguelen Plateau. In addition, biogenic opal sedimentation plays an important role throughout most of the sequence. A major increase in opal accumulation is documented at all sites in late Miocene time, which is in accordance with the well-known increase in silica productivity probably caused by a major cooling step. Because of its position near the Polar Frontal Zone, sediments from Site 737 show a more extensive opal deposition than at Sites 744 and 738. An earlier productivity pulse is documented at Site 744 on the southern plateau within the early Oligocene, following the initial phase of intense East Antarctic glaciation. This cooling event resulted in higher amounts of ice-rafted terrigenous quartz and, to a lesser extent, feldspar. With the exception of the Site 744 sediments, opal deposition in Paleogene and older sediments can be reconstructed only from the diagenetic transformation products of opal-CT and probably clinoptilolite. In contrast to the southern sequence, on the northern Kerguelen Plateau higher amounts of clinoptilolite and no opal-CT were found. These major differences in the diagenetic environments may be due to extensive volcanism in the northern area. The volcanic influence at Site 737 is well recorded by the higher feldspar content and higher amounts of volcanic glass shards.
    Type: Article , NonPeerReviewed
    Format: text
    DOI: 10.2973/odp.proc.sr.119.122.1991
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    OceanRep: Article in a Scientific Journal - without review
  • 9
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    Drivers of river reactivation in North Africa during the last glacial cycle (2021)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: North African greening phases, during which large rivers ran through the Sahara Desert, occurred repeatedly during the Quaternary and are regarded as key periods for the development of past human populations. However, the timing and mechanisms responsible for the reactivation of the presently dormant fluvial systems remain highly uncertain. Here we present hydroclimate changes over the past 160,000 years, reconstructed from analyses of the provenance of terrestrial sediments in a marine sediment record from the Gulf of Sirte (offshore Libya). By combining high-resolution proxy data with transient Earth system model simulations, we are able to identify the various drivers that led to the observed shifts in hydroclimate and landscapes. We show that river runoff occurred during warm interglacial phases of Marine Isotope Stages 1 and 5 due to precession-forced enhancements in the summer and autumn rainfall over the entire watershed, which fed presently dry river systems and intermittent coastal streams. In contrast, shorter-lasting and less-intense humid events during glacial Marine Isotope Stages 3 and 4 were related to autumn and winter precipitation over the Libyan coastal regions driven by Mediterranean storms. Our results reveal large shifts in hydroclimate environments during the last glacial cycle, which probably exerted a strong evolutionary and structural control on past human populations, potentially pacing their dispersal across northern Africa.
    Type: Article , PeerReviewed
    Format: text
    Format: other
    Format: other
    Format: other
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 10
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    First evidence for a late LGM subglacial lake in Pine Island Bay, Antarctica (2016)
    Geophysical Research Abstracts, Vol. 18, EGU2016-7429
    In:  EPIC3EGU General Assembly, Vienna, 2016-04-18-2016-04-22Geophysical Research Abstracts, Vol. 18, EGU2016-7429
    Details
    Publication Date: 2018-08-10
    Description: Subglacial lakes are widespread beneath the Antarctic Ice Sheet and as a source for subglacial meltwater they are assumed to modulate ice stream velocity. Further, the evacuation of subglacial meltwater at the ice sheet margin influences ocean circulation and geochemical cycles. However, despite their importance„ subglacial lakes are one of the least explored environments on our planet. As a consequence, their importance for ice sheet dynamics and their ability to harbour life remain poorly characterised. We present the first direct evidence for a palaeo-subglacial lake on the Antarctic continental shelf, document- ing that subglacial meltwater was stored during the last glacial period and evacuated during the subsequent deglaciation. A distinct sediment facies observed in a core recovered from a small bedrock basin in Pine Island Bay, Amundsen Sea, is indicative of deposition within a low-energy subglacial lake setting. Diffusive modelling demonstrates that low chloride concentrations in the pore water of this characteristic sediment facies can only be explained by original deposition in a freshwater setting. We also show that the location of the subglacial lake within a basin on the inner shelf is consistent with the predicted distribution of subglacial lakes based on bathymetric data. This finding will enable future modelling studies to investigate how the geometry and capacity of subglacial lake systems can influence ice dynamics when the substrate and profile of the ice sheet is known – especially in the highly sensitive area known as the "weak underbelly" of the WAIS. With the exception of a direct lake water access at Subglacial Lake Vostok, and some centimetres of sediment retrieval from Subglacial Lake Whillans, the subglacial hydrological system in Antarctica has hitherto mostly been explored using remote sensing and numerical models that suggest the number of potential lake sites to more than 12.000. Our study not only provides first empirical evidence for a palaeo-subglacial lake but also delivers a framework for investigating and refining exploration of these unique subglacial lake environments and their sediments beneath thick contemporary ice sheets. Our approach, however, is easier and cheaper to conduct by using ship borne coring equipment on the seasonal ice-free continental shelf.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Format: application/pdf
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