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Ibaraki, Masako (1990): Eocene through Pleistocene planktonic foraminifera off Peru [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.745615, Supplement to: Ibaraki, M (1990): Eocene through Pleistocene planktonic foraminifers off Peru, Leg 112 - biostratigraphy and paleoceanography. In: Suess, E; von Huene, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 112, 239-262, https://doi.org/10.2973/odp.proc.sr.112.197.1990

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Abstract:
Planktonic foraminifers were studied from 213 samples collected during Leg 112 at 10 sites located on the continental shelf and slope off Peru. Because planktonic foraminifers occur discontinuously downcore, detailed biostratigraphic zonation was not defined. However, it was possible to distinguish early and middle Eocene, early and late Miocene, Pliocene, and Pleistocene sediments on the basis of the planktonic foraminifers. The oldest sediments of Zone P6 of early Eocene age were obtained from the basal part of Hole 688E, which was penetrated to 779.0 m below seafloor (bsf). A biosiliceous facies of the area predominates above the N6-N7 zonal interval of early Miocene age.
All sites are within the present coastal upwelling area off Peru, and many of the late Pliocene and Pleistocene assemblages are similar to those that are characteristic of modern upwelling areas. The core samples differ, however, by having a predominance of cold-water elements, such as Neogloboquadrina incompta and N. pachyderma. Warm-water species are prevalent at some horizons in the cores, suggesting shifts of the coastal upwelling centers or warmer climatic events.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -10.782115 * Median Longitude: -79.013917 * South-bound Latitude: -13.480160 * West-bound Longitude: -80.583500 * North-bound Latitude: -8.991500 * East-bound Longitude: -76.891500
Date/Time Start: 1986-11-07T01:15:00 * Date/Time End: 1986-12-18T09:00:00
Event(s):
112-681A * Latitude: -10.976660 * Longitude: -77.957670 * Date/Time Start: 1986-11-07T01:15:00 * Date/Time End: 1986-11-08T00:00:00 * Elevation: -161.0 m * Penetration: 187 m * Recovery: 112.4 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 187 m cored; 0 m drilled; 60.1 % recovery
112-681B * Latitude: -10.976660 * Longitude: -77.957670 * Date/Time Start: 1986-11-08T00:00:00 * Date/Time End: 1986-11-08T13:15:00 * Elevation: -162.0 m * Penetration: 143.5 m * Recovery: 97.3 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 143.5 m cored; 0 m drilled; 67.8 % recovery
112-682A * Latitude: -11.266500 * Longitude: -79.062170 * Date/Time Start: 1986-11-09T01:15:00 * Date/Time End: 1986-11-14T13:30:00 * Elevation: -3801.0 m * Penetration: 436.7 m * Recovery: 127.04 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 436.7 m cored; 0 m drilled; 29.1 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
10 datasets

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Datasets listed in this publication series

  1. Ibaraki, M (1990): (Table 2) Distribution of planktonic foraminifers in ODP Site 112-681. https://doi.org/10.1594/PANGAEA.745604
  2. Ibaraki, M (1990): (Table 3) Distribution of planktonic foraminifers in ODP Hole 112-682A. https://doi.org/10.1594/PANGAEA.745605
  3. Ibaraki, M (1990): (Table 4) Distribution of planktonic foraminifers in ODP Hole 112-683A. https://doi.org/10.1594/PANGAEA.745607
  4. Ibaraki, M (1990): (Table 5) Distribution of planktonic foraminifers in ODP Hole 112-683B. https://doi.org/10.1594/PANGAEA.745608
  5. Ibaraki, M (1990): (Table 6) Distribution of planktonic foraminifers in ODP Site 112-684. https://doi.org/10.1594/PANGAEA.745609
  6. Ibaraki, M (1990): (Table 7) Distribution of planktonic foraminifers in ODP Hole 112-685A. https://doi.org/10.1594/PANGAEA.745610
  7. Ibaraki, M (1990): (Table 8) Distribution of planktonic foraminifers in ODP Site 112-686. https://doi.org/10.1594/PANGAEA.745611
  8. Ibaraki, M (1990): (Table 9) Distribution of planktonic foraminifers in ODP Site 112-687. https://doi.org/10.1594/PANGAEA.745612
  9. Ibaraki, M (1990): (Table 10) Distribution of planktonic foraminifers in ODP Hole 112-688A. https://doi.org/10.1594/PANGAEA.745613
  10. Ibaraki, M (1990): (Table 11) Distribution of planktonic foraminifers in ODP Hole 112-688E. https://doi.org/10.1594/PANGAEA.745614