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  • 171-1052; Acarinina praetopilensis, δ13C; AGE; Blake Nose, North Atlantic Ocean; Comment; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Globigerinatheka mexicana, δ13C; Joides Resolution; Leg171B; Mass spectrometer VG Isogas Prism; Morozovella crassata, δ13C; Morozovella spinulosa, δ13C; Morozovella spp., δ13C; Nuttallides truempyi, δ13C; Ocean Drilling Program; ODP; Sample code/label; Subbotina utilisindex, δ13C; Turborotalia cocoaensis, δ13C  (1)
  • 171-1052; Acarinina praetopilensis; Acarinina praetopilensis, δ18O; Blake Nose, North Atlantic Ocean; Chiloguembelina cubensis; Chiloguembelina cubensis, δ18O; Comment; COMPCORE; Composite Core; Counting 250-355 µm fraction; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Foraminifera, benthic; Foraminifera, benthic δ18O; Globigerinatheka mexicana; Globigerinatheka mexicana, δ18O; Hantkenina alabamensis; Hantkenina alabamensis, δ18O; Joides Resolution; Leg171B; Mass spectrometer VG Isogas Prism; Morozovella crassata; Morozovella crassata, δ18O; Morozovella spinulosa; Morozovella spinulosa, δ18O; Morozovella spp.; Morozovella spp., δ18O; Nuttallides truempyi; Nuttallides truempyi, δ18O; Ocean Drilling Program; ODP; Sample code/label; Subbotina utilisindex; Subbotina utilisindex, δ18O; Turborotalia cocoaensis; Turborotalia cocoaensis, δ18O; δ13C, carbonate  (1)
  • 171-1052; Blake Nose, North Atlantic Ocean; COMPCORE; Composite Core; Joides Resolution; Leg171B; Ocean Drilling Program; ODP  (1)
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  • 1
    Publication Date: 2024-04-25
    Keywords: 171-1052; Acarinina praetopilensis, δ13C; AGE; Blake Nose, North Atlantic Ocean; Comment; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Globigerinatheka mexicana, δ13C; Joides Resolution; Leg171B; Mass spectrometer VG Isogas Prism; Morozovella crassata, δ13C; Morozovella spinulosa, δ13C; Morozovella spp., δ13C; Nuttallides truempyi, δ13C; Ocean Drilling Program; ODP; Sample code/label; Subbotina utilisindex, δ13C; Turborotalia cocoaensis, δ13C
    Type: Dataset
    Format: text/tab-separated-values, 987 data points
    Location Call Number Expected Availability
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  • 2
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    Unknown
    PANGAEA
    In:  Supplement to: Wade, Bridget S (2004): Planktonic foraminiferal biostratigraphy and mechanisms in the extinction of Morozovella in the late middle Eocene. Marine Micropaleontology, 51(1-2), 23-38, https://doi.org/10.1016/j.marmicro.2003.09.001
    Publication Date: 2024-04-25
    Description: The muricate planktonic foraminiferal genera Morozovella and Acarinina were abundant and diverse during the upper Palaeocene to middle Eocene and dominated the tropical and subtropical assemblages. A significant biotic turnover in planktonic foraminifera occurred in the latest middle Eocene with a notable reduction in the acarininid lineage and the extinction of the morozovellids. These genera are extensively employed as palaeoclimatic and biostratigraphic markers and, therefore, this turnover episode is an important event in the record of the Cenozoic planktonic foraminifera. Sediments from the western North Atlantic (Ocean Drilling Program Site 1052) were examined in order to investigate these extinction events, in terms of both timing and mechanisms. Biostratigraphic events of the middle and late Eocene have been examined with a sampling resoluti on of approximately 3 kyr. These have been calibrated to the magneto- and astrochronology to accurately define the timing of key biostratigraphic events, particularly the extinction of Morozovella spinulosa which is a distinct biomarker for late middle Eocene sediments. High-resolution biostratigraphy reveals that the extinctions in the muricate group occurred in a stepwise form. The large acarininids (Acarinina praetopilensis) terminate 10 kyr prior to the extinction of M. spinulosa and small acarininids (Acarinina medizzai and Acarinina echinata) continue into the upper Eocene. High-resolution stable isotope analyses have been conducted on planktonic and benthic foraminifera from the western North Atlantic to reconstruct sea surface temperatures (SSTs) and deep water temperatures and the structure of the water column around this major biotic turnover. Whilst the extinctions of M. spinulosa and A. praetopilensis occur during a long-term cooling trend, the biotic turnover in the muricate group does not appear to be related to significant climatic change. Sea surface temperatures decrease slowly prior to the extinction events, and there is no evidence for a large-temperature shift associated with the faunal changes. The turnover event was therefore probably related to the increased surface water productivity and the deterioration of photosymbiotic partnerships with algae.
    Keywords: 171-1052; Blake Nose, North Atlantic Ocean; COMPCORE; Composite Core; Joides Resolution; Leg171B; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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  • 3
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Wade, Bridget S; Kroon, Dick (2002): Middle Eocene regional climate instability: Evidence from the western North Atlantic. Geology, 30(11), 1011-1014, https://doi.org/10.1130/0091-7613(2002)030%3C1011:MERCIE%3E2.0.CO;2
    Publication Date: 2024-04-25
    Description: High-resolution (~3 k.y.) delta18O records from middle Eocene mixed-layer dwelling planktonic foraminifera from the western North Atlantic show pronounced (〉1‰) variability. The magnitude of change is greater than that seen in open-ocean Pleistocene records, but could not have been caused by ice-volume and/or sea-level fluctuations. Instead, the oxygen isotope shifts resulted primarily from large oscillations in sea-surface temperatures and indicate that the regional paleoceanography of the middle Eocene western North Atlantic was not consistently warm or stable. The large shifts in sea-surface temperatures could reflect variations in the position of the Gulf Stream relative to Blake Nose or variations in upwelling intensity.
    Keywords: 171-1052; Acarinina praetopilensis; Acarinina praetopilensis, δ18O; Blake Nose, North Atlantic Ocean; Chiloguembelina cubensis; Chiloguembelina cubensis, δ18O; Comment; COMPCORE; Composite Core; Counting 250-355 µm fraction; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Foraminifera, benthic; Foraminifera, benthic δ18O; Globigerinatheka mexicana; Globigerinatheka mexicana, δ18O; Hantkenina alabamensis; Hantkenina alabamensis, δ18O; Joides Resolution; Leg171B; Mass spectrometer VG Isogas Prism; Morozovella crassata; Morozovella crassata, δ18O; Morozovella spinulosa; Morozovella spinulosa, δ18O; Morozovella spp.; Morozovella spp., δ18O; Nuttallides truempyi; Nuttallides truempyi, δ18O; Ocean Drilling Program; ODP; Sample code/label; Subbotina utilisindex; Subbotina utilisindex, δ18O; Turborotalia cocoaensis; Turborotalia cocoaensis, δ18O; δ13C, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 2744 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
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