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  • 2005-2009  (24)
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  • 1
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    The Wunstorf Drilling Project: Coring a Global Stratigraphic Reference Section of the Oceanic Anoxic Event 2 (2007)
    In:  Scientific Drilling, 4 . pp. 19-21.
    Details
    Publication Date: 2016-09-08
    Type: Article , NonPeerReviewed
    Format: text
    DOI: 10.2204/iodp.sd.4.05.2007
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    OceanRep: Article in a Scientific Journal - without review
  • 2
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    The Cenomanian-Turonian of the Wunstorf section - (North Germany): global stratigraphic reference section and new orbital time scale for Oceanic Anoxic Event 2 (2008)
    Schweizerbart
    In:  Newsletters on Stratigraphy, 43 (1). pp. 65-89.
    Details
    Publication Date: 2017-02-16
    Description: The Cenomanian–Turonian Boundary Event (CTBE) is reflected by one of the most extreme carbon cycle perturbations in Earth's history and is characterized by the widespread occurrence of sediments indicating oxygen deficiency in oceanic waters (Oceanic Anoxic Event 2 = OAE 2). At Wunstorf (northern Germany) the CTBE is represented by a 26.5 m thick sedimentary succession consisting of rhythmically bedded laminated black shales, dark organic-rich marls and marly limestones yielding abundant micro- and macrofossils, making the locality particularly well suited to serve as an international standard reference section for the CTBE. In 2006 a newly drilled continuous core recovered 76 m of middle Cenomanian to middle Turonian sediments. A high-resolution carbonate δ13C curve derived from core samples resolves all known features of the positive δ13C anomaly of OAE 2 with high accuracy. Throughout the middle Cenomanian – middle Turonian succession, the δ13C curve shows numerous small-scaled positive excursions, which appear to be cyclic. High-resolution borehole geophysics and XRF core scanning were performed to generate two time series of gamma-ray data and Ti concentrations for the CTBE black shale succession. Hierarchical bundling of sedimentary cycles as well as spectral analysis and Gaussian filtering of dominant frequencies reveal cycle frequency ratios characteristic for short eccentricity modulated precession (100 kyr, 21 kyr). This new orbital time scale provides a time estimate of 430–445 kyr for the duration of OAE 2 and refines the existing orbital age models developed at localities in the English Chalk, the Western Interior Basin and the Tarfaya Basin. Based on the new age model and high-resolution carbon isotope correlation, our data allow for the first time a precise basin-wide reconstruction of the palaeoceanographic modifications within the European shelf sea during OAE 2.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1127/0078-0421/2008/0043-0065
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    The role of biogeography and ecology on the isotope signature of cuttlefishes (Cephalopoda, Sepiidae) and the impact on belemnite studies (2009)
    Elsevier
    In:  Palaeogeography, Palaeoclimatology, Palaeoecology, 284 (3-4). pp. 153-163.
    Details
    Publication Date: 2021-08-24
    Description: Calcitic belemnite guards are often used for temperature reconstructions of ancient seawater by using oxygen isotope thermometry. These geochemical studies discuss diagenesis and vital effects but neglect ecological or biogeographic effects on the isotope signature. To estimate the impact of seasonal temperature variations, short-term salinity changes and biogeography on the isotope signals we compare the δ18O and δ13C signals of ten cuttlebones with local water temperatures. The cuttlebones (aragonitic internal shells) come from five different species of recent cuttlefish (Sepiidae, Sepia sp.) from seven different regions (North Sea, Baltic Sea, Mediterranean, Red Sea, Angola, North Australia and Tasmania). All analysed specimens reflect the temperature-characteristics of their habitat perfectly. The δ18O signal and calculated temperatures follow annual temperature changes of up to 15 °C. The δ13C values show no clear pattern and are thought to be controlled by vital effects. Freshwater influence is recognizable in the negative δ18O and δ13C values of the Baltic Sea specimen, although sudden short-term salinity changes are not reflected by the signatures.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.palaeo.2009.09.021
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    (Appendix A) Campanian-Maastrichtian calcareous nannofossils in DSDP Hole 44-390A (2009)
    PANGAEA
    In:  Supplement to: Linnert, Christian; Mutterlose, Jörg (2009): Evidence of increasing surface water oligotrophy during the Campanian-Maastrichtian boundary interval: Calcareous nannofossils from DSDP Hole 390A (Blake Nose). Marine Micropaleontology, 73(1-2), 26-36, https://doi.org/10.1016/j.marmicro.2009.06.006
    Details
    Publication Date: 2023-07-10
    Description: The latest Cretaceous (Campanian–Maastrichtian) is characterized by several global cooling and intermittent warming events. These climatic changes influenced the palaeoceanography substantially, including changes of the deep water sources and surface water currents. One of the most prominent episodes of climatic cooling occurred during the Campanian–Maastrichtian transition. This study focuses on the palaeoclimate and palaeoceanography of the Campanian–Maastrichtian transition by analysing the calcareous nannofossils of DSDP Hole 390A (139.92–126.15 mbsf; Blake Nose). For the examination of calcareous nannofossils sixty samples were processed using the settling technique. Biostratigraphical index taxa (Broinsonia parca constricta, Uniplanarius trifidus, and Tranolithus orionatus) suggest a late Campanian age for the major part of the studied section. The calcareous nannofossils are well preserved, highly abundant (6.80 billion specimens/gram sediment) and diverse (80 species/sample). The assemblages are dominated by Prediscosphaera spp. (20.5%), Watznaueria spp. (20.3%) and Retecapsa spp. (9.8%). Cool water taxa (Ahmuellerella octoradiata, Gartnerago segmentatum, and Kamptnerius magnificus), however, appear less frequently and do not exceed more than 1%. Due to their rarity these cool water taxa do not support the existence of an intense cooling phase during the Campanian–Maastrichtian transition at DSDP Hole 390A. Around 133 mbsf several nannofossil taxa, however, show a distinctive turnover. Mesotrophic species like Discorhabdus ignotus, Zeugrhabdotus bicrescenticus and Zygodiscus exmouthiensis are abundant below 133 mbsf, whereas oligotrophic taxa like Watznaueria spp., Eiffellithus spp. and Staurolithites flavus become common above this level. These changes imply a decrease in the input of nutrients, perhaps caused by a reorganization of ocean currents (Palaeo Gulf Stream) and reduced upwelling.
    Keywords: 44-390A; Ahmuellerella octoradiata; Ahmuellerella regularis; Amphizygus brooksii; Amphizygus cf. brooksii; Arkhangelskiella cymbiformis; Biscutum dissimile; Biscutum ellipticum; Biscutum magnum; Biscutum melaniae; Biscutum notaculum; Braarudosphaera bigelowii; Broinsonia parca constricta; Broinsonia signata; Bukrylithus ambiguus; Calculites obscurus; Ceratolithoides brevicorniculans; Ceratolithoides cf. kamptneri; Ceratolithoides indiensis; Ceratolithoides longissimus; Ceratolithoides prominens; Ceratolithoides self-trailiae; Ceratolithoides sp.; Chiastozygus amphipons; Chiastozygus antiquus; Chiastozygus bifarius; Chiastozygus litterarius; Chiastozygus synquadriperforatus; Chiastozygus trabalis; Corollithion completum; Corollithion exiguum; Corollithion madagaskarensis; Corollithion signum; Cretarhabdus conicus; Cribrocorona gallica; Cribrosphaerella ehrenbergii; Cyclagelosphaera reinhardtii; Cylindralithus nieliae; Cylindralithus sculptus; Cylindralithus serratus; Deep Sea Drilling Project; DEPTH, sediment/rock; Discorhabdus ignotus; Diversity, simple; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Eiffellithus eximius; Eiffellithus gorkae; Eiffellithus turriseiffelii; Eprolithus sp.; Evenness of species; Flabellites oblongus; Gartnerago segmentatum; Glomar Challenger; Gorkaea obliqueclausus; Grantarhabdus coronadventis; Helicolithus trabeculatus; Kamptnerius magnificus; Lapideacassis sp.; Leg44; Lithraphidites carniolensis; Lithraphidites praequadratus; Lucianorhabdus cayeuxii; Manivitella pemmatoidea; Markalius inversus; Marthasterites sp.; Micrantholithus quasihoschulzii; Microrhabdulus decoratus; Micula concava; Micula decussata; Micula sp.; Micula swastica; Miravetesina bergenii; Misceomarginatus pleniporus; Nannofossils; North Atlantic; Palaeopontosphaera sp.; Perchnielsenella stradneri; Pervilithus varius; Petrarhabdus vietus; Petrobrasiella bownii; Placozygus fibuliformis; Prediscosphaera cretacea; Prediscosphaera grandis; Prediscosphaera majungae; Prediscosphaera microrhabdulina; Prediscosphaera sp.; Prediscosphaera spinosa; Prediscosphaera spp.; Prolatipatella multicarinata; Quadrum gartneri; Random settling technique; Geissen et al. (1999); Reinhardtites levis; Retecapsa angustiforata; Retecapsa crenulata; Retecapsa ficula; Retecapsa schizobrachiata; Retecapsa spp.; Retecapsa surirella; Rhagodiscus angustus; Rhagodiscus indistinctus; Rhagodiscus reniformis; Rhagodiscus splendens; Rhomboaster sp.; Rotelapillus biarcus; Rucinolithus hayi; Rucinolithus sp.; Sample code/label; Scapholithus fossilis; Shannon Diversity Index; Staurolithites ellipticus; Staurolithites flavus; Staurolithites mielnicensis; Staurolithites mutterlosei; Tegumentum stradneri; Tetrapodorhabdus decorus; Tranolithus minimus; Tranolithus orionatus; Tubodiscus sp.; Uniplanarius gothicus; Uniplanarius trifidus; Watznaueria barnesiae; Watznaueria biporta; Watznaueria fossacincta; Watznaueria ovata; Watznaueria spp.; Zeugrhabdotus bicrescenticus; Zeugrhabdotus embergeri; Zeugrhabdotus erectus; Zeugrhabdotus noeliae; Zeugrhabdotus sigmoides; Zygodiscus exmouthiensis; Zygodiscus tunisiensis
    Type: Dataset
    Format: text/tab-separated-values, 7620 data points
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    DATA PANGAEA
  • 5
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    Cenomanian benthic foraminifera of Demerara Rise (2009)
    PANGAEA
    In:  Supplement to: Friedrich, Oliver; Erbacher, Jochen; Wilson, Paul A; Moriya, Kazuyoshi; Mutterlose, Jörg (2009): Paleoenvironmental changes across the Mid Cenomanian Event in the tropical Atlantic Ocean (Demerara Rise, ODP Leg 207) inferred from benthic foraminiferal assemblages. Marine Micropaleontology, 71(1-2), 28-40, https://doi.org/10.1016/j.marmicro.2009.01.002
    Details
    Publication Date: 2024-01-09
    Description: This study is based on Cenomanian sediments of Ocean Drilling Program (ODP) Sites 1258 and 1260 from Demerara Rise (Leg 207, western tropical Atlantic, off Suriname, ~1000 and ~500 m paleo-water depth, respectively). Studied sediments consist of laminated black shales with TOC values between 3 and 18% and include the Mid Cenomanian Event (MCE), a positive carbon isotope excursion predating the well-known Oceanic Anoxic Event 2 (OAE 2). Benthic foraminiferal assemblages of the continuously eutrophic environment at Demerara Rise are characterized by low diversities (〈= 9 species per sample) and large fluctuations in abundances, indicating oxygen depletion and varying organic matter fluxes. Dominant species at both sites are Bolivina anambra, Gabonita levis, Gavelinella dakotensis, Neobulimina albertensis, Praebulimina prolixa, and Tappanina cf. laciniosa. Benthic foraminiferal assemblages across the MCE show a threefold pattern: (1) stable ecological conditions below the MCE interval indicated by relatively high oxygenation and fluctuating organic matter flux, (2) decreasing oxygenation and/or higher organic matter flux during the MCE with decreasing benthic foraminiferal numbers and diversities (Site 1258) and a dominance of opportunistic species (Site 1260), and (3) anoxic to slightly dysoxic bottom-water conditions above the MCE as indicated by very low diversities and abundances or even the absence of benthic foraminifera. Slightly dysoxic conditions prevailed until OAE 2 at Demerara Rise. A comparison with other Atlantic Ocean and Tethyan sections indicates that the MCE reflects a paleoceanographic turning point towards lower bottom-water oxygenation, at least in the proto-North Atlantic Ocean and in the Tethyan and Boreal Realms. This general trend towards lower oxygenation of bottom waters across the MCE is accompanied by ongoing climate warming in combination with rising sea-level and the development of vast shallow epicontinental seas during the Middle and Late Cenomanian. These changes are proposed to have favoured the formation of warm and saline waters that may have contributed to intermediate- and deep-water masses at least in the restricted proto-North Atlantic and Tethyan Ocean basins, poor oxygenation of the Late Cenomanian sediments, and the changes in benthic foraminiferal assemblages across the MCE.
    Keywords: 207-1258A; 207-1260A; 207-1260B; DRILL; Drilling/drill rig; Joides Resolution; Leg207; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 6
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    Calcareous nannofossils from the Paleocene-Eocene Thermal Maximum of the equatorial Atlantic (2007)
    PANGAEA
    In:  Supplement to: Mutterlose, Jörg; Linnert, Christian; Norris, Richard D (2007): Calcareous nannofossils from the Paleocene-Eocene Thermal Maximum of the equatorial Atlantic (ODP Site 1260B): Evidence for tropical warming. Marine Micropaleontology, 65(1-2), 13-31, https://doi.org/10.1016/j.marmicro.2007.05.004
    Details
    Publication Date: 2024-01-09
    Description: Independent geological and micropaleontological lines of evidence suggest a ~200 kyr, period of intense warming covering the Paleocene/Eocene boundary interval (PETM). It has been suggested that this warming was initiated by a massive release of methane from the continental slopes. Among other groups of organisms, calcareous nannofossils are characterized by a remarkable increase of warm water taxa during this interval. Here we report the tropical response of calcareous nannofossils to the Paleocene/Eocene interval in ODP Site 1260B (283.15-276.35 mbsf). The PETM is about 1.38 m thick (279.88-278.5 mbsf) as defined by the onset and termination of the delta13C excursion and is marked by a ~12 cm thick laminated clay layer at the start of the excursion. A 30 cm thick interval (279.75-279.45 mbsf) directly above the clay layer, is characterized by common Discoaster spp. and Coccolithus subpertusus (syn. Ericsonia subpertusus) and the first occurrences of Discoaster araneus, Rhomboaster cuspis and Tribrachiatus bramlettei. All five taxa are interpreted as proxies for warm surface waters. The increase of Discoaster spp. during the PETM is solely caused by the onset of the new species D. araneus, which is here seen as a malformed Discoaster related to specific PETM conditions. These possibly include an acidification of the surface waters and/or higher salinity. The Rhomboaster/Tribrachiatus group, which first occurs in the PETM, is also thought to be a proxy for increased salinity. The abundance of the genus Toweius, indicative for mesotrophic conditions, declines simultaneously. Discoaster abundance decreases in the later stages of the PETM, being substituted by Chiasmolithus and Campylosphaera indicating a change to more eutrophic conditions. The genus Fasciculithus, very common in the tropical Paleocene, suffered a dramatic decline in the clay layer (basal PETM), without recovering later in the Eocene. This decline and the subsequent extinction of Fasciculithus, a solid robust nannolith, are here thought to be related to a calcification crises, perhaps caused by a high CO2 concentration and an acidification of the oceans. The observed changes in the composition of the calcareous nannofossils were relatively short lived, following the course of the PETM, which was characterized by warm surface waters with possibly low pH conditions.
    Keywords: 207-1260B; DRILL; Drilling/drill rig; Joides Resolution; Leg207; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 7
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    Range table from nannofossils in ODP Hole 143-869B (2005)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 143-869B; Abundance estimate; Ahmuellerella octoradiata; Arkhangelskiella specillata; Biscutum constans; Ceratolithoides aculeus; Chiastozygus litterarius; Coccosphaera; Comment; Corollithion exiguum; Cretarhabdus sp.; Cribrosphaerella ehrenbergii; Crucibiscutum salebrosum; Cylindralithus sp.; Depth, composite; DEPTH, sediment/rock; Discorhabdus rotatorius; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eiffellithus eximius; Eiffellithus turriseiffelii; Joides Resolution; Leg143; Lithraphidites carniolensis; Manivitella pemmatoidea; Microrhabdulus decoratus; Micula decussata; Nannofossil abundance; Nannofossils preservation; North Pacific Ocean; Ocean Drilling Program; ODP; Parhabdolithus embergeri; Prediscosphaera cretacea; Prediscosphaera honjoi; Quadrum gothicum; Quadrum sissinghii; Quadrum trifidum; Reinhardtites anthophorus; Rhagodiscus asper; Rhagodiscus splendens; Rucinolithus irregularis; Sample code/label; Tranolithus phacelosus; Vagalapilla stradneri; Watznaueria barnesae; Zygodiscus diplogrammus; Zygodiscus erectus; Zygodiscus spiralis
    Type: Dataset
    Format: text/tab-separated-values, 247 data points
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    DATA PANGAEA
  • 8
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    Stable organic carbon isotope ratios and total organic carbon content from the Cenomanian-Turonian boundary interval of ODP Hole 207-1259A (2005)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 207-1259A; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Element analyser CHN, Carlo Erba; Joides Resolution; Leg207; Mass spectrometer Finnigan Delta-S; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 268 data points
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    DATA PANGAEA
  • 9
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    (Appendix A1) Cenomanian benthic foraminifera of ODP Hole 207-1258A (2009)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 207-1258A; Astacolus parallelus; Bolivina anambra; Buliminella fabilis; Counting 〉63 µm fraction; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Foraminifera, benthic; Gabonita levis; Gavelinella cf. intermedia; Gavelinella dakotensis; Joides Resolution; Laevidentalina sp.; Leg207; Neobulimina albertensis; Ocean Drilling Program; ODP; Praebulimina prolixa; Sample code/label; Saracenaria cf. erlitta; South Atlantic Ocean; Tappanina laciniosa
    Type: Dataset
    Format: text/tab-separated-values, 429 data points
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    DATA PANGAEA
  • 10
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    Stable organic carbon isotope ratios and total organic carbon content from the Cenomanian-Turonian boundary interval of ODP Site 207-1260 (2005)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 207-1260; Carbon, organic, total; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Element analyser CHN, Carlo Erba; Intercore correlation; Joides Resolution; Leg207; Mass spectrometer GV Instruments Isoprime; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 244 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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