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Okada, Hisatake (1990): Quaternary and Paleogene calcareous nannofossils of ODP Leg 115 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.756081, Supplement to: Okada, H (1990): Quaternary and Paleogene calcareous nannofossils, Leg 115. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 129-174, https://doi.org/10.2973/odp.proc.sr.115.150.1990

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Published: 1990 (exact date unknown) • DOI registered: 2011-02-16

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Abstract:
The occurrences of ten datum events for the Quaternary and top Pliocene nannofossils are identified at nine Leg 115 sites. A quantitative investigation of Paleogene nannofossils in 470 samples selected from 11 holes at 9 sites yielded 197 taxa, including one new species and 10 unidentified taxa that are likely to be new species. Regional differences in the timing of some biostratigraphically important events are recognized, and a set of datum events useful for biostratigra- phy in the tropical Indian Ocean is presented.
Biogeographical differences are minor for Paleogene cores from the tropical sites (Sites 707-716); however, the Quaternary and late early Oligocene floras observed at the two subtropical sites (Sites 705 and 706) differ significantly from the corresponding floras of the tropical sites. Bathymetrically controlled dissolution is recognized by the reduction of species diversity in the Paleogene flora. Selective dissolution of nannofossils is also evidenced by the percentage reduction of three holococcolith taxa, Lanternithus minutus, Zygrhablithus bijugatus, and Holococcolith type A as well as by the increase of Coccolithus pelagicusand Cribrocentrum reticulatumin the deeper sites.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -4.458121 * Median Longitude: 63.575026 * South-bound Latitude: -13.167000 * West-bound Longitude: 59.016800 * North-bound Latitude: 5.081500 * East-bound Longitude: 73.831300
Date/Time Start: 1987-05-07T04:00:00 * Date/Time End: 1987-06-29T00:00:00
Event(s):
115-705A * Latitude: -13.167000 * Longitude: 61.383700 * Date/Time Start: 1987-05-21T21:00:00 * Date/Time End: 1987-05-22T18:30:00 * Elevation: -2318.0 m * Penetration: 27.5 m * Recovery: 19.16 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 3 cores; 27.5 m cored; 0 m drilled; 69.7 % recovery
115-706A * Latitude: -13.114000 * Longitude: 61.371000 * Date/Time Start: 1987-05-22T23:15:00 * Date/Time End: 1987-05-23T08:00:00 * Elevation: -2517.0 m * Penetration: 47.5 m * Recovery: 39.28 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 47.5 m cored; 0 m drilled; 82.7 % recovery
115-706C * Latitude: -13.114000 * Longitude: 61.371000 * Date/Time Start: 1987-05-24T03:30:00 * Date/Time End: 1987-05-26T00:45:00 * Elevation: -2518.0 m * Penetration: 121.7 m * Recovery: 19.72 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 77.4 m cored; 0 m drilled; 25.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
16 datasets

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Datasets listed in this publication series

  1. Okada, H (1990): (Table 3) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Site 115-706. https://doi.org/10.1594/PANGAEA.756065
  2. Okada, H (1990): (Table 4) Occurrence of calcareous nannofossils observed in the Oligocene and upper Eocene samples from ODP Hole 115-707A. https://doi.org/10.1594/PANGAEA.756067
  3. Okada, H (1990): (Table 5) Occurrence of calcareous nannofossils observed in the upper to middle Eocene samples from ODP Hole 115-707C. https://doi.org/10.1594/PANGAEA.756068
  4. Okada, H (1990): (Table 6) Occurrence of calcareous nannofossils observed in the lower Eocene and Paleocene samples from ODP Hole 115-707C. https://doi.org/10.1594/PANGAEA.756069
  5. Okada, H (1990): (Table 7) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Hole 115-708A. https://doi.org/10.1594/PANGAEA.756070
  6. Okada, H (1990): (Table 9) Occurrence of calcareous nannofossils observed in the Eocene samples from ODP Hole 115-709C. https://doi.org/10.1594/PANGAEA.756072
  7. Okada, H (1990): (Table 8) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Hole 115-709C. https://doi.org/10.1594/PANGAEA.756071
  8. Okada, H (1990): (Table 16) Occurrence of Oligocene to middle Eocene events and their ages observed in ODP Holes 115-709C and 115-711A. https://doi.org/10.1594/PANGAEA.756080
  9. Okada, H (1990): (Table 10) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Hole 115-710A. https://doi.org/10.1594/PANGAEA.756073
  10. Okada, H (1990): (Table 12) Occurrence of calcareous nannofossils observed in the Eocene samples from ODP Hole 115-711A. https://doi.org/10.1594/PANGAEA.756075
  11. Okada, H (1990): (Table 11) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Hole 115-711B. https://doi.org/10.1594/PANGAEA.756074
  12. Okada, H (1990): (Table 13) Occurrence of calcareous nannofossils observed in the Oligocene and Eocene samples from ODP Hole 115-712A. https://doi.org/10.1594/PANGAEA.756076
  13. Okada, H (1990): (Table 14) Occurrence of calcareous nannofossils observed in the Eocene samples from ODP Hole 115-713A. https://doi.org/10.1594/PANGAEA.756077
  14. Okada, H (1990): (Table 15) Occurrence of calcareous nannofossils observed in the Oligocene samples from ODP Hole 115-714A. https://doi.org/10.1594/PANGAEA.756079
  15. Okada, H (1990): (Table 1) The latest Pliocene and Quaternary datum events of ODP Leg 115 holes. https://doi.org/10.1594/PANGAEA.756043
  16. Okada, H (1990): (Table 2) Geologic age and zonal assignment of ODP Leg 115 Paleogene cores based on calcareous nannofossils. https://doi.org/10.1594/PANGAEA.756064