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Wei, Wuchang; Bergen, James A; Applegate, Joseph L (1988): Calcareous nannofossils of ODP Leg 103 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.743817, Supplement to: Wei, W et al. (1988): Cenozoic calcareous nannofossils from the Galicia margin, Ocean Drilling Program Leg 103. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 279-292, https://doi.org/10.2973/odp.proc.sr.103.143.1988

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Abstract:
Ocean Drilling Program Leg 103 occupied five sites on the Galicia margin, northwest of the Iberian Peninsula. Two holes (Holes 637A and 638B) yielded significant Cenozoic sedimentary sections ranging from late Miocene to late Pleistocene in age. From the nannofossil stratigraphy, one hiatus is recognized in Hole 637A (2.35-2.4 Ma), whereas two hiatuses (one at 1.9-2.6 Ma and another at 3.5-3.7 Ma) are recognized in Hole 638B. Sediment-accumulation rates for the Cenozoic portions of these two holes have been calculated based on the nannofossil datums. The abundance ratios of Coccolithus pelagicus to Discoaster brouweri for Hole 637A show relatively low values and small fluctuations from 2.5 to 6.5 Ma but sharply increase and then widely fluctuate beginning at about 2.5 Ma. This may indicate relatively warmer, more stable surface-water temperatures from 2.5 to 6.5 Ma and cooler, variable surface-water temperatures after 2.5 Ma at Site 637. C. pelagicus/D. brouweri ratios from Hole 638B also show a trend of increasing values with time from late Miocene to late Pliocene, but with more fluctuations and a different pattern from that of Hole 637A.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 42.120800 * Median Longitude: -12.530000 * South-bound Latitude: 42.088300 * West-bound Longitude: -12.863300 * North-bound Latitude: 42.153300 * East-bound Longitude: -12.196700
Date/Time Start: 1985-04-28T18:00:00 * Date/Time End: 1985-05-12T23:15:00
Event(s):
103-637A * Latitude: 42.088300 * Longitude: -12.863300 * Date/Time Start: 1985-04-28T18:00:00 * Date/Time End: 1985-05-04T21:00:00 * Elevation: -5321.0 m * Penetration: 285.6 m * Recovery: 116.31 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 285.6 m cored; 0 m drilled; 40.7 % recovery
103-638B * Latitude: 42.153300 * Longitude: -12.196700 * Date/Time Start: 1985-05-06T00:15:00 * Date/Time End: 1985-05-12T23:15:00 * Elevation: -4673.0 m * Penetration: 431.1 m * Recovery: 212.87 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 431.1 m cored; 0 m drilled; 49.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Wei, W; Bergen, JA; Applegate, JL (1988): (Table 1) Distribution of calcareous nannofossils in ODP Hole 103-637A. https://doi.org/10.1594/PANGAEA.743813
  2. Wei, W; Bergen, JA; Applegate, JL (1988): (Table 2) Distribution of calcareous nannofossils in ODP Hole 103-638B. https://doi.org/10.1594/PANGAEA.743814