Mutterlose, Jörg (1992): Lower Cretaceous nannofossils of the northwestern Australian margin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.729394, Supplement to: Mutterlose, J (1992): Lower Cretaceous nannofossil biostratigraphy off northwestern Australia (Leg 123). In: Gradstein, FM; Ludden, JN; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 123, 343-368, https://doi.org/10.2973/odp.proc.sr.123.124.1992
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Abstract:
Moderately to sparsely nannofossiliferous Neocomian siliciclastics and rich Aptian-Albian nannofossil chalks were cored at two Leg 123 sites on the abyssal plains off northwestern Australia. At Site 765, the basal 70 m of cored section yields questionable Tithonian and Berriasian to early Hauterivian assemblages of moderate diversity containing Cruelellipsis cuvillieri, Tegumentum striatum, Speetonia colligata, and Crucibiscutum salebrosum. The overlying Hauterivianlower Aptian is represented by 140 m of sediments barren of nannofossils. Above this, the remaining 80 m of the Lower Cretaceous section has been assigned to the Rhagodiscus angustus Zone (late Aptian-early Albian in age) and the Prediscosphaera columnata Zone (middle-late Albian in age). Common species include Rhagodiscus angustus, Prediscosphaera columnata, Eprolithus floralis, Eprolithus sp., Chiastozygus litterarius, Rucinolithus irregularis, and Flabellites biforaminis.
At Site 766, the Neocomian, represented by 200 m of sediment, yields C. cuvillieri, T. striatum, S. colligata, and C. salebrosum. Within the overlying Aptian-Albian sequence of 80 m, the Rhagodiscus angustus, and P. columnata zones were recognized.
The paleobiogeographic patterns and implications are discussed, with special emphasis paid to the bipolar high-latitude distribution pattern of C. salebrosum in the Valanginian-Hauterivian. Biostratigraphically important species are discussed and their occurrence in the Indian Ocean is compared with one from the Tethys and Boreal realms. Two new species, Serbiscutum gaultensis and Eprolithus bettenstaedtii, are described.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -17.954000 * Median Longitude: 114.014650 * South-bound Latitude: -19.932000 * West-bound Longitude: 110.454100 * North-bound Latitude: -15.976000 * East-bound Longitude: 117.575200
Date/Time Start: 1988-09-11T04:25:00 * Date/Time End: 1988-10-26T00:00:00
Event(s):
123-765C * Latitude: -15.976000 * Longitude: 117.575200 * Date/Time Start: 1988-09-11T04:25:00 * Date/Time End: 1988-09-22T10:30:00 * Elevation: -5728.0 m * Penetration: 963.9 m * Recovery: 373.35 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg123 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 65 cores; 613.7 m cored; 0 m drilled; 60.8 % recovery
123-766A * Latitude: -19.932000 * Longitude: 110.454100 * Date/Time Start: 1988-10-19T20:45:00 * Date/Time End: 1988-10-26T00:00:00 * Elevation: -4008.0 m * Penetration: 527.2 m * Recovery: 347.49 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg123 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 55 cores; 527.2 m cored; 0 m drilled; 65.9 % 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
- Mutterlose, J (1992): (Table 1) Distribution of Lower Cretaceous calcareous nannofossils in ODP Hole 123-765C. https://doi.org/10.1594/PANGAEA.729392
- Mutterlose, J (1992): (Table 2) Distribution of Lower Cretaceous calcareous nannofossils in ODP Hole 123-766A. https://doi.org/10.1594/PANGAEA.729393