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Watkins, David K (1992): Upper Cretaceous nannofossils from ODP Leg 120 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.758732, Supplement to: Watkins, DK (1992): Upper Cretaceous nannofossils from Leg 120, Kerguelen Plateau, Southern Ocean. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 343-370, https://doi.org/10.2973/odp.proc.sr.120.180.1992

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Abstract:
Drilling on the Kerguelen Plateau during Leg 120 cored the most complete, best preserved record of the Late Cretaceous of the Southern Ocean to date. Two calcareous pelagic sedimentary sections (Sites 747 and 750) provide a record from the upper Turonian(?)-lower Coniacian through the Maestrichtian. Two major disconformities interrupt the record: upper Coniacian-lower Santonian and mid-Campanian. Site 748 contains a Campanian-Maestrichtian record of neritic sedimentation dominated by nannofossil-bearing, intermittently silicified, glauconitic bioclastic grainstones to wackestones. Parts of the upper Maestrichtian and the mid-Campanian are absent at this site.
A set of 21 biostratigraphic events were used to correlate these sections. This combination of cosmopolitan and austral events allowed local, regional, and global correlation. Correlation of this scheme from the pelagic sites to the neritic site indicates the applicability of this system to the sparse, restricted assemblages of the upper Campanian and lower Maestrichtian. Comparison of the Kerguelen assemblages with previous records indicates weak provincialism and little endemism in the Coniacian through early Campanian Southern Ocean. Strong provincial distinction with high endemism is typical of the late Campanian through Maestrichtian. The change from weak to strong provincialism coincides with the mid-Campanian disconformity. The event marked or masked by this disconformity must have involved ecological decoupling of the Southern Ocean from more temperate surface-water masses. A new species, Zeugrhabdotus kerguelenensis, is named.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -56.948000 * Median Longitude: 79.010613 * South-bound Latitude: -58.441000 * West-bound Longitude: 76.794000 * North-bound Latitude: -54.811000 * East-bound Longitude: 81.240300
Date/Time Start: 1988-03-06T00:00:00 * Date/Time End: 1988-04-23T04:00:00
Event(s):
120-747 * Latitude: -54.811000 * Longitude: 76.794000 * Date/Time Start: 1988-03-06T00:00:00 * Date/Time End: 1988-03-12T00:00:00 * Elevation: -1706.7 m * Penetration: 656.8 m * Recovery: 325.8 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg120 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 49 cores; 450.8 m cored; 0 m drilled; 72.3% recovery
120-748C * Latitude: -58.441000 * Longitude: 78.998100 * Date/Time Start: 1988-03-15T11:00:00 * Date/Time End: 1988-03-23T22:54:00 * Elevation: -1301.0 m * Penetration: 935 m * Recovery: 185.88 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg120 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 87 cores; 760 m cored; 0 m drilled; 24.5 % recovery
120-750A * Latitude: -57.592000 * Longitude: 81.240300 * Date/Time Start: 1988-04-14T06:15:00 * Date/Time End: 1988-04-18T14:00:00 * Elevation: -2041.0 m * Penetration: 460.5 m * Recovery: 68.63 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg120 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 core; 189.3 m cored; 0 m drilled; 36.3 % 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

  1. Watkins, DK (1992): (Table 1) Calcareous nannofossil distribution in the Upper Cretaceous of ODP Site 120-747. https://doi.org/10.1594/PANGAEA.758716
  2. Watkins, DK (1992): (Table 2) Calcareous nannofossil distribution in the Upper Cretaceous of ODP Hole 120-748C. https://doi.org/10.1594/PANGAEA.758717
  3. Watkins, DK (1992): (Table 3) Calcareous nannofossil distribution in the Upper Cretaceous of ODP Site 120-750. https://doi.org/10.1594/PANGAEA.758718