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Bralower, Timothy J; Siesser, William G (1992): Cretaceous calcareous nannofossils from Exmouth and Wombat Plateau, Northwest Australia [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.729187, Supplement to: Bralower, TJ; Siesser, WG (1992): Cretaceous calcareous nannofossil biostratigraphy of sites 761, 762, and 763, xmouth and Wombat Plateaus, Northwest Australia. In: von Rad, U; Haq, BU; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 122, 529-556, https://doi.org/10.2973/odp.proc.sr.122.169.1992

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Abstract:
Three sites drilled during Leg 122, Site 761 on the Wombat Plateau and Sites 762 and 763 on the Exmouth Plateau, provide a composite Cretaceous section ranging in age from Berriasian to Maestrichtian. Together, these sites contain an apparently complete, expanded Aptian-Maestrichtian record. Consistently occurring and moderately well-preserved nannofossil assemblages allow reasonably high biostratigraphic resolution. Our data indicate that traditional middle and Upper Cretaceous nannofossil biozonations are not entirely applicable in this region. In this investigation, we compare in detail the relative ranges of key Cretaceous nannofossil markers in the eastern Indian Ocean and in sections from Europe and North Africa. We have determined which previously used events are applicable, and which additional markers have biostratigraphic utility in this region. Significant differences in Campanian-Maestrichtian assemblages exist between the more northern Site 761 and Sites 762 and 763. Such differences are surprising, considering that these sites are only separated by 3° of latitude. We interpret them as marking a strong thermal gradient over the Exmouth Plateau region. Other results include the recovery of an expanded Albian-Cenomanian sequence containing a mixture of Austral and Tethyan floras, which will enable correlation of biozonations established for these two realms; the recovery of two condensed but apparently complete Cenomanian-Turonian boundary sections; correlation of Upper Cretaceous calcareous nannofossil biostratigraphy with magneto- and foraminifer stratigraphy; and correlation of portions of the Barrow Group equivalents to the Berriasian and Valanginian stages.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -19.070333 * Median Longitude: 113.332567 * South-bound Latitude: -20.587000 * West-bound Longitude: 112.208700 * North-bound Latitude: -16.737000 * East-bound Longitude: 115.535000
Date/Time Start: 1988-07-19T10:00:00 * Date/Time End: 1988-08-11T21:00:00
Event(s):
122-761B * Latitude: -16.737000 * Longitude: 115.535000 * Date/Time Start: 1988-07-19T10:00:00 * Date/Time End: 1988-07-21T09:00:00 * Elevation: -2179.0 m * Penetration: 286.7 m * Recovery: 199.08 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 286.7 m cored; 0 m drilled; 69.4 % recovery
122-762C * Latitude: -19.887000 * Longitude: 112.254000 * Date/Time Start: 1988-07-27T03:25:00 * Date/Time End: 1988-08-05T08:30:00 * Elevation: -1371.0 m * Penetration: 940 m * Recovery: 534.54 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 91 core; 940 m cored; 0 m drilled; 56.9 % recovery
122-763B * Latitude: -20.587000 * Longitude: 112.208700 * Date/Time Start: 1988-08-06T07:30:00 * Date/Time End: 1988-08-11T21:00:00 * Elevation: -1379.0 m * Penetration: 653.5 m * Recovery: 376.36 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 653.5 m cored; 0 m drilled; 57.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Bralower, TJ; Siesser, WG (1992): (Table 1) Range chart of calcareous nannofossils in ODP Hole 122-761B. https://doi.org/10.1594/PANGAEA.729181
  2. Bralower, TJ; Siesser, WG (1992): (Table 4) Sub-bottom depth of nannofossil events in ODP Hole 122-761B. https://doi.org/10.1594/PANGAEA.729184
  3. Bralower, TJ; Siesser, WG (1992): (Table 2) Range chart of calcareous nannofossils in ODP Hole 122-762C. https://doi.org/10.1594/PANGAEA.729182
  4. Bralower, TJ; Siesser, WG (1992): (Table 4) Sub-bottom depth of nannofossil events in ODP Hole 122-762C. https://doi.org/10.1594/PANGAEA.729185
  5. Bralower, TJ; Siesser, WG (1992): (Table 3) Range chart of calcareous nannofossils in ODP Hole 122-763B. https://doi.org/10.1594/PANGAEA.729183
  6. Bralower, TJ; Siesser, WG (1992): (Table 4) Sub-bottom depth of nannofossil events in ODP Hole 122-763B. https://doi.org/10.1594/PANGAEA.729186