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  • 1
    Buch
    Buch
    Cenozoic cosmopolitan deep-water benthic foraminifera (1986)
    Pau : Elf Aquitaine
    Details Verfügbarkeit
    Materialart: Buch
    Seiten: VII, 421 S , zahlr. Ill., graph. Darst , 1 Beil , 31 cm
    ISBN: 2901026206
    Serie: Bulletin des Centres de Recherches Exploration - Production Elf-Aquitaine 11
    Sprache: Englisch
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  • 2
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    Magnetostratigraphy and biostratigraphy of ODP Leg 105 sites and DSDP Hole 12-112 (1989)
    PANGAEA
    In:  Supplement to: Baldauf, Jack G; Clement, Bradford M; Aksu, Ali E; de Vernal, Anne; Firth, John V; Hall, Frank R; Head, Martin J; Jarrard, Richard D; Kaminski, Michael Anthony; Lazarus, David B; Monjanel, Anne-Lise; Berggren, William A; Gradstein, Felix M; Knüttel, Stephen; Mudie, Peta J; Russell, Merlin D Jr (1989): Magnetostratigraphic and biostratigraphic synthesis of Ocean Drilling Program Leg 105: Labrador Sea and Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 935-956, https://doi.org/10.2973/odp.proc.sr.105.165.1989
    Details
    Publikationsdatum: 2024-01-09
    Beschreibung: During Ocean Drilling Program (ODP) Leg 105, three sites (Sites 645 through 647) were drilled in Baffin Bay and the Labrador Sea to examine the tectonic evolution and the climatic and oceanic histories of this region. Biostratigraphic and magnetostratigraphic results vary at each site, while stratigraphic resolution depends on the limited abundance of marker species and the completeness of the paleomagnetic record. Because of the paucity of planktonic microfossils and the poor paleomagnetic record signatures, stratigraphic determinations at Site 645 often rely on defining minimum temporal constraints on specific samples or stratigraphic intervals. The completed stratigraphy indicates that the sedimentary sequence recovered at Site 645 is early Miocene to Holocene in age. The magnetostratigraphy and biostratigraphies are better defined at Sites 646 and 647 in the Labrador Sea. Site 646 generally contains a well-developed magnetostratigraphy and calcareous microfossil biostratigraphy. This biostratigraphy is based on calcareous nannofossils and planktonic foraminifers typical of the North Atlantic Ocean. Siliceous microfossils are also present at Site 646, but they are restricted to upper Pliocene through Holocene sediments. The stratigraphic sequence recovered at Site 646 is late Miocene to Holocene in age. Based primarily on the calcareous nannofossil stratigraphy, the sequence recovered at Site 647 consists of lower Eocene to lower Oligocene, lower Miocene, upper Miocene, and upper Pliocene through Holocene sediments. Three hiatuses are present in this sequence: the older hiatus separates lower Oligocene sediments from lower Miocene sediments, another hiatus separates lower Miocene sediments from upper Miocene sediments, and the youngest one separates upper Miocene from upper Pliocene sediments. A magnetostratigraphy is defined for the interval from the Gauss/Matuyama boundary through the Brunhes (Clement et al., this volume). Both planktonic foraminifers and siliceous microfossils have restricted occurrences. Planktonic foraminifers occur in Pliocene and younger sediments, and siliceous microfossils are present in lower Miocene and lower Oligocene sediments. The near-continuous Eocene through lower Oligocene sequence recovered at Site 647 allows the calcareous nannofossils and diatom stratigraphies at this site to act as a Paleogene stratigraphic framework. This framework can be compared with the stratigraphy previously completed for DSDP Site 112.
    Schlagwort(e): 105-646; 105-647; 12-112; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Labrador Sea; Leg105; Leg12; North Atlantic; Ocean Drilling Program; ODP; South Atlantic Ocean
    Materialart: Dataset
    Format: application/zip, 3 datasets
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  • 3
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    Estimated chronologic ages of benthic microfossil events in ODP Site 105-647 (Table 1) (1989)
    PANGAEA
    In:  Supplement to: Kaminski, Michael Anthony; Gradstein, Felix M; Berggren, William A (1989): Paleogene benthic foraminifer biostratigraphy and paleoecology at Site 647, southern Labrador Sea. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 705-730, https://doi.org/10.2973/odp.proc.sr.105.124.1989
    Details
    Publikationsdatum: 2024-01-09
    Beschreibung: Benthic foraminifers were examined from the Paleogene of Ocean Drilling Program (ODP) Site 647 and Deep Sea Drilling Program (DSDP) Site 112 in the southern Labrador Sea. The Paleogene sequence of the deep Labrador Sea can be subdivided into seven assemblages, based on the ranges and relative abundance of characteristic taxa. The first occurrences (FOs) and last occurrences (LOs) of important benthic taxa are calibrated to a standard biochronology, by interpolating from our age model for Site 647. The biostratigraphy of Site 647 is used to improve the age estimates of Site112 cores. Fifteen microfossil events in Site 647 also are found in the sedimentary wedge along the Labrador Margin. A comparison of the probabilistic microfossil sequence from the Labrador Margin with that at Site 647 yields four isochronous benthic foraminifer LOs. Two new species are described from Sites 647 and 112: Hyperammina kenmilleri, Kaminski n.sp., and Ammodiscus nagyi Kaminski n.sp. Significant faunal turnovers are observed at the Ypresian/Lutetian and Eocene/Oligocene boundaries. The Ypresian/Lutetian boundary is characterized by a Glomospira-facies and is attributed to a rise in the CCD (carbonate compensation depth) associated with the NP14 lowstand in sea level. The Eocene/Oligocene boundary is delimited by the LO of Spiroplectammina spectabilis and Reticulophragmium amplectens. The change from an Eocene agglutinated assemblageto a predominantly calcareous assemblage in the early Oligocene took place gradually, over a period of about 4 Ma, but the rate of change accelerated near the boundary. This faunal turnover is attributed to changes in the preservationof agglutinated foraminifers, as delicate species disappeared first. Increasingly poorer preservation of agglutinated foraminifers in the late Eocene to earliest Oligocene reflects the first appearance of cool, nutrient-poor deep water in the southern Labrador Sea. The approximately coeval disappearance of agglutinated assemblages along the Labrador Margin was caused by a regional trend from slope to shelf environments, accentuated by the 'mid'-Oligocene lowstand in sea level.
    Schlagwort(e): 105-647; Age, maximum/old; Age, minimum/young; Age model; Ageprofile Datum Description; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg105; Ocean Drilling Program; ODP; South Atlantic Ocean
    Materialart: Dataset
    Format: text/tab-separated-values, 101 data points
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  • 4
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    (Table 3) Biostratigraphy and paleomagnetic events from ODP Site 105-647 (1989)
    PANGAEA
    Details
    Publikationsdatum: 2024-01-09
    Schlagwort(e): 105-647; Ageprofile Datum Description; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DSDP/ODP/IODP sample designation; Joides Resolution; Leg105; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; South Atlantic Ocean
    Materialart: Dataset
    Format: text/tab-separated-values, 181 data points
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  • 5
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    (Table 2) Biostratigraphy and paleomagnetic events from ODP Site 105-646 (1989)
    PANGAEA
    Details
    Publikationsdatum: 2024-01-09
    Schlagwort(e): 105-646; Ageprofile Datum Description; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DSDP/ODP/IODP sample designation; Joides Resolution; Labrador Sea; Leg105; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2
    Materialart: Dataset
    Format: text/tab-separated-values, 208 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
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