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Manivit, Helene (1989): Calcareous nannofossil biostratigraphy of ODP Leg 108 sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.746289, Supplement to: Manivit, H (1989): Calcareous nannofossil biostratigraphy of Leg 108 sediments. In: Ruddiman, W; Sarnthein, M; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 108, 35-69, https://doi.org/10.2973/odp.proc.sr.108.126.1989

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Abstract:
Calcareous nannofossils were examined from the 400 cores recovered at 12 sites during Ocean Drilling Program Leg 108 in the eastern equatorial Atlantic Ocean and along the northwest African margin, representing a transect spanning 24° of latitude.
Thirty calcareous nannofossil biohorizons were recognized in the Neogene and Quaternary sequences; only Site 661, located in water depths of 3500 m, contains a fossiliferous record older than the Oligocene.
At Site 661, a 200-m-thick sequence of Upper Cretaceous sediments yielded Maestrichtian and uppermost Campanian nannofossils, yet a continuous Cretaceous/Tertiary boundary was not recovered. Widespread sediment slumps and turbidites deposited at many sites interrupted the pelagic sedimentation. A careful study of calcareous nannofossil and foraminifer assemblages correlated to paleomagnetic records suggests that "slumped" units at most sites were added as extra sediments to rapidly deposited pelagic sediments, with minor disturbance of the surrounding layers.
Nannofossils are generally common to abundant and moderately preserved at all sites except for those located in two upwelling areas, where placoliths are etched and discoasters overgrown.
Typical low-latitudinal zonal markers were used during this study, yet some of them were considered to be of little biostratigraphic value because of their inconsistent stratigraphic ranges and low abundances. This is especially apparent for the intervals representing the Miocene/Pliocene and Oligocene/Miocene boundaries.
Characteristic nannofossils of cool-water conditions and low discoaster abundances occur at the coastal African upwelling and along the south equatorial divergence sites, signifying a stronger advection of cold waters toward the equator within the Canary and Benguela eastern boundary currents.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 7.874669 * Median Longitude: -19.084008 * South-bound Latitude: -1.390200 * West-bound Longitude: -23.227500 * North-bound Latitude: 21.331500 * East-bound Longitude: -11.739200
Date/Time Start: 1986-02-27T22:15:00 * Date/Time End: 1986-04-14T11:30:00
Event(s):
108-657A * Latitude: 21.331500 * Longitude: -20.948800 * Date/Time Start: 1986-02-27T22:15:00 * Date/Time End: 1986-03-01T22:00:00 * Elevation: -4232.0 m * Penetration: 178.2 m * Recovery: 127.57 m * Location: Canarias Sea * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 178.2 m cored; 0 m drilled; 71.6 % recovery
108-658A * Latitude: 20.749200 * Longitude: -18.580800 * Date/Time Start: 1986-03-04T15:15:00 * Date/Time End: 1986-03-07T01:15:00 * Elevation: -2274.0 m * Penetration: 300.4 m * Recovery: 294.98 m * Location: Canarias Sea * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 300.4 m cored; 0 m drilled; 98.2 % recovery
108-659A * Latitude: 18.077200 * Longitude: -21.026200 * Date/Time Start: 1986-03-09T09:30:00 * Date/Time End: 1986-03-11T05:30:00 * Elevation: -3082.0 m * Penetration: 273.8 m * Recovery: 174.95 m * Location: South Atlantic Ocean * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 273.8 m cored; 0 m drilled; 63.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
13 datasets

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Datasets listed in this publication series

  1. Manivit, H (1989): (Table 3) Distribution of Pleistocene to late Miocene nannofossils in ODP Hole 108-657A. https://doi.org/10.1594/PANGAEA.746269
  2. Manivit, H (1989): (Table 4) Distribution of Pleistocene to early Pliocene nannofossils in ODP Hole 108-658A. https://doi.org/10.1594/PANGAEA.746270
  3. Manivit, H (1989): (Table 5) Distribution of Pleistocene to late Oligocene nannofossils in ODP Hole 108-659A. https://doi.org/10.1594/PANGAEA.746271
  4. Manivit, H (1989): (Table 6) Distribution of Pleistocene to late Pliocene nannofossils in ODP Hole 108-660A. https://doi.org/10.1594/PANGAEA.746275
  5. Manivit, H (1989): (Table 7) Distribution of Pleistocene to Miocene nannofossils in ODP Hole 108-661A. https://doi.org/10.1594/PANGAEA.746276
  6. Manivit, H (1989): (Table 7) Distribution of Maestrichtian to late Campanian nannofossils in ODP Hole 108-661A. https://doi.org/10.1594/PANGAEA.746278
  7. Manivit, H (1989): (Table 8) Distribution of Pleistocene to early Pliocene nannofossils in ODP Hole 108-662A. https://doi.org/10.1594/PANGAEA.746279
  8. Manivit, H (1989): (Table 9) Distribution of Pleistocene to late Pliocene nannofossils in ODP Hole 108-663A. https://doi.org/10.1594/PANGAEA.746280
  9. Manivit, H (1989): (Table 10) Distribution of Pleistocene to late Miocene nannofossils in ODP Hole 108-664A. https://doi.org/10.1594/PANGAEA.746281
  10. Manivit, H (1989): (Table 11) Distribution of Pleistocene to early Pliocene nannofossils in ODP Hole 108-665A. https://doi.org/10.1594/PANGAEA.746284
  11. Manivit, H (1989): (Table 12) Distribution of Pleistocene to early Pliocene nannofossils in ODP Hole 108-666A. https://doi.org/10.1594/PANGAEA.746285
  12. Manivit, H (1989): (Table 13) Distribution of Pleistocene to early Pliocene nannofossils in ODP Hole 108-667A. https://doi.org/10.1594/PANGAEA.746286
  13. Manivit, H (1989): (Table 14) Distribution of Pleistocene to late Pliocene nannofossils in ODP Hole 108-668A. https://doi.org/10.1594/PANGAEA.746287