Oberhänsli, Hedi (1991): Planktonic foraminiferal assemblages of DSDP Hole 75-532 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.727563, Supplement to: Oberhänsli, H (1991): Upwelling signals at the northeastern Walvis Ridge during the past 500,000 years. Paleoceanography, 6(1), 53-71, https://doi.org/10.1029/90PA02106
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Abstract:
Qualitative and quantitative analyses of planktonic foraminiferal assemblages from Deep Sea Drilling Project site 532 shed light on hydrographic changes over the Walvis Ridge during the past 500,000 years. From changes in distribution of foraminiferal assemblages, two major hydrographic regimes (coastal and geostrophic branches of the Benguela Current and the Angola Current) can be distinguished at site 532. It is suggested that the hydrographic situation on the northeastern Walvis Ridge was characterized by intensified upwelling and a westward expansion of the coastal upwelling cells during several global cooling pulses. During glacial stages 2-4, the middle part of stage 6, sporadically from the lower stage 8 through upper stage 10, and during stage 12, site 532 was located beneath the coastal branch of the Benguela Current because faunal distribution patterns indicate intensified upwelling. The Angola Current probably intruded the area of study during the lower stages 5, sporadically 6-8, and 11, as documented by the increased abundance of Neogloboquadrina dutertrei.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -19.743500 * Longitude: 10.518800
Date/Time Start: 1980-08-20T00:00:00 * Date/Time End: 1980-08-20T00:00:00
Event(s):
75-532 * Latitude: -19.743500 * Longitude: 10.518800 * Date/Time: 1980-08-20T00:00:00 * Elevation: -1331.0 m * Penetration: 250.8 m * Recovery: 232 m * Location: South Atlantic * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 59 cores; 242.8 m cored; 8 m drilled; 95.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Oberhänsli, H (1991): (Table 3) Stable oxygen isotope ratios of Globigerina bulloides from DSDP Hole 75-532. https://doi.org/10.1594/PANGAEA.57020
- Oberhänsli, H (1991): (Table 3) Stable oxygen isotope ratios of Uvigerina spp. from DSDP Hole 75-532. https://doi.org/10.1594/PANGAEA.57021
- Oberhänsli, H (1991): (Table1) Abundance of planktonic foraminifera in DSDP Hole 75-532. https://doi.org/10.1594/PANGAEA.57022