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Spaulding, Stacia A (1991): Calcareous nannofossils in Neogene sediments of ODP Leg 117 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.728348, Supplement to: Spaulding, SA (1991): Neogene nannofossil biostratigraphy of sites 723 through 730, Oman continental margin, nortwestern Arabian Sea. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 5-36, https://doi.org/10.2973/odp.proc.sr.117.127.1991

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Abstract:
Calcareous nannofossils were studied in 574 Neogene samples recovered from eight sites drilled in block-faulted basins on the continental margin of Oman. This portion of the Arabian Sea experiences seasonal upwelling associated with the southwest monsoon. Not surprisingly, some of the more typical Neogene warm-water nannoplankton are either missing entirely or are extremely rare in these sediments. Coccolithus pelagicus, a typical cold-water indicator, is extremely abundant in many samples of late Pliocene to early Pleistocene age. These intervals correspond to periods of Northern Hemisphere glaciation. Reworked Late Cretaceous and Cenozoic nannofossils are found in a majority of the samples. They were probably carried from the Arabian Peninsula or the continent of Africa on strong southwest summer winds.
Ages for the various nannofossil events were calculated by projecting the nannofossil datums onto the magnetostratigraphic scale for Sites 724, 727, and 728. These are the first ages for the various nannofossil datums derived from Oman Margin sediments. The following ages have been calculated for these nannofossil events: FAD Emiliania huxleyi, 0.23 Ma; LAD Pseudoemiliania lacunosa, 0.38 Ma; FAD Helicosphaera inversa, 0.42 Ma; top of acme of Reticulofenestra sp. A, 0.70 Ma; FAD Gephyrocapsaparallela, 0.85 Ma; LAD Gephyrocapsa spp. (large), 1.07 Ma; LAD Helicosphaera sellii, 1.34 Ma; LAD Calcidiscus macintyrei, 1.47 Ma; FAD Gephyrocapsa oceanica, 1.53 Ma; FAD Gephyrocapsa caribbeanica, 1.80 Ma; LAD Discoaster brouweri, 2.03 Ma; LAD Discoasterpentaradiatus, 2.31 Ma; LAD Discoaster surculus, 2.42; LAD Discoaster tamalis, 2.77 Ma; LAD Sphenolithus abies, 3.44 Ma; and LAD Reticulofenestra pseudoumbilica, 3.44 Ma.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 17.955238 * Median Longitude: 57.691075 * South-bound Latitude: 17.644600 * West-bound Longitude: 57.371500 * North-bound Latitude: 18.487300 * East-bound Longitude: 57.954700
Date/Time Start: 1987-09-15T11:45:00 * Date/Time End: 1987-09-30T16:30:00
Event(s):
117-723A * Latitude: 18.051800 * Longitude: 57.609000 * Date/Time Start: 1987-09-15T11:45:00 * Date/Time End: 1987-09-17T04:30:00 * Elevation: -806.0 m * Penetration: 432.3 m * Recovery: 298.29 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 432.3 m cored; 0 m drilled; 69 % recovery
117-724 * Latitude: 18.462500 * Longitude: 57.786500 * Date/Time Start: 1987-09-20T00:00:00 * Date/Time End: 1987-09-21T00:00:00 * Elevation: -602.7 m * Penetration: 554.6 m * Recovery: 500.4 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 59 cores; 554.6 m cored; 0 m drilled; 90.2% recovery
117-724A * Latitude: 18.462500 * Longitude: 57.786500 * Date/Time Start: 1987-09-20T10:45:00 * Date/Time End: 1987-09-20T15:00:00 * Elevation: -603.0 m * Penetration: 44.5 m * Recovery: 44.76 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 44.5 m cored; 0 m drilled; 100.6 % 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. Spaulding, SA (1991): (Table 1) Distribution of calcareous nannofossils in ODP Hole 117-723A. https://doi.org/10.1594/PANGAEA.728331
  2. Spaulding, SA (1991): (Table 9) Calcareous nannofossil events in ODP Hole 117-723A. https://doi.org/10.1594/PANGAEA.728340
  3. Spaulding, SA (1991): (Table 9, 12) Calcareous nannofossil events in ODP Site 117-724. https://doi.org/10.1594/PANGAEA.728341
  4. Spaulding, SA (1991): (Table 2) Distribution of calcareous nannofossils in ODP Hole 117-724A. https://doi.org/10.1594/PANGAEA.728333
  5. Spaulding, SA (1991): (Table 3) Distribution of calcareous nannofossils in ODP Hole 117-725C. https://doi.org/10.1594/PANGAEA.728334
  6. Spaulding, SA (1991): (Table 9) Calcareous nannofossil events in ODP Hole 117-725C. https://doi.org/10.1594/PANGAEA.728342
  7. Spaulding, SA (1991): (Table 4) Distribution of calcareous nannofossils in ODP Hole 117-726A. https://doi.org/10.1594/PANGAEA.728335
  8. Spaulding, SA (1991): (Table 9) Calcareous nannofossil events in ODP Hole 117-726A. https://doi.org/10.1594/PANGAEA.728343
  9. Spaulding, SA (1991): (Table 5) Distribution of calcareous nannofossils in ODP Hole 117-727A. https://doi.org/10.1594/PANGAEA.728336
  10. Spaulding, SA (1991): (Table 9, 12) Calcareous nannofossil events in ODP Hole 117-727A. https://doi.org/10.1594/PANGAEA.728344
  11. Spaulding, SA (1991): (Table 6) Distribution of calcareous nannofossils in ODP Hole 117-728A. https://doi.org/10.1594/PANGAEA.728338
  12. Spaulding, SA (1991): (Table 9, 12) Calcareous nannofossil events in ODP Hole 117-728A. https://doi.org/10.1594/PANGAEA.728345
  13. Spaulding, SA (1991): (Table 7) Distribution of calcareous nannofossils in ODP Hole 117-729A. https://doi.org/10.1594/PANGAEA.728337
  14. Spaulding, SA (1991): (Table 9) Calcareous nannofossil events in ODP Hole 117-729A. https://doi.org/10.1594/PANGAEA.728346
  15. Spaulding, SA (1991): (Table 8) Distribution of calcareous nannofossils in ODP Hole 117-730A. https://doi.org/10.1594/PANGAEA.728339
  16. Spaulding, SA (1991): (Table 9) Calcareous nannofossil events in ODP Hole 117-730A. https://doi.org/10.1594/PANGAEA.728347