Knüttel, Stephen; Russell, Merlin D Jr; Firth, John V (1989): Calcareous nannofossils from ODP Leg 105 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.744869, Supplement to: Knüttel, S et al. (1989): Neogene calcareous nannofossils from ODP Leg 105: implications for Pleistocene paleoceanographic trends. 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, 245-262, https://doi.org/10.2973/odp.proc.sr.105.130.1989
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Abstract:
Neogene calcareous nannofossils were examined from 10 holes at three sites cored during ODP Leg 105. Sediment recovered in Baffin Bay at Site 645 is virtually barren of calcareous nannofossils, with the exception of a sparse lower Miocene assemblage. Sites 646 and 647 in the Labrador Sea contain upper Miocene to Holocene sediments having numerous barren intervals.
Upper Pleistocene fossil coccolithophorid floras in the Labrador Sea indicate alternations of cold subpolar with transitional (subpolar/subtropical) assemblages. Extreme variations in the abundance of Coccolithus pelagicus were observed at Sites 646 and 647. These variations are correlated with stable isotopic data to interpret oceanographic responses to warming and cooling trends. The climatic history indicated by the changes of these assemblages closely approximates the past climatic fluctuations recorded in other North Atlantic cores.
One new taxon, Discoaster bergenii, is described.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 56.583300 * Median Longitude: -47.333400 * South-bound Latitude: 53.331300 * West-bound Longitude: -48.369100 * North-bound Latitude: 58.209300 * East-bound Longitude: -45.262000
Date/Time Start: 1985-10-03T05:45:00 * Date/Time End: 1985-10-23T18:15:00
Event(s):
105-646A * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-03T05:45:00 * Date/Time End: 1985-10-04T05:30:00 * Elevation: -3460.0 m * Penetration: 103.5 m * Recovery: 92.14 m * Location: Labrador Sea * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 core; 103.5 m cored; 0 m drilled; 89 % recovery
105-646B * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-13T21:01:00 * Elevation: -3459.0 m * Penetration: 766.7 m * Recovery: 404.25 m * Location: Labrador Sea * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 80 cores; 766.2 m cored; 0 m drilled; 52.8 % recovery
105-647A * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00 * Elevation: -3869.0 m * Penetration: 736 m * Recovery: 444.6 m * Location: South Atlantic Ocean * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 75 cores; 716.6 m cored; 0 m drilled; 62 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Knüttel, S; Russell, MDJ; Firth, JV (1989): (Table 1) Distribution of Pleistocene calcareous nannofossils in ODP Hole105-646A. https://doi.org/10.1594/PANGAEA.744866
- Knüttel, S; Russell, MDJ; Firth, JV (1989): (Table 2) Distribution of late Miocene to Pleistocene calcareous nannofossils in ODP Hole 105-646B. https://doi.org/10.1594/PANGAEA.744867
- Knüttel, S; Russell, MDJ; Firth, JV (1989): (Table 3) Distribution of late Miocene to Pleistocene calcareous nannofossils in ODP Hole 105-647A. https://doi.org/10.1594/PANGAEA.744868