10.1594/PANGAEA.729434
Bown, Paul R
Paul R
Bown
0000-0001-6777-4463
Jurassic to Cretaceous calcareous nannofossils from the Argo Abyssal Plain
PANGAEA
1992
Drilling/drill rig
Leg27
Leg123
Glomar Challenger
Joides Resolution
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
1972-11-17T00:00:00/1988-09-22T10:30:00
en
Supplementary Publication Series of Datasets
10.2973/odp.proc.sr.123.170.1992
3 datasets
application/zip
Creative Commons Attribution 3.0 Unported
A summary of calcareous nannofossil biostratigraphy performed for Late Jurassic (Kimmeridgian) to Early Cretaceous (Hauterivian) cores of Site 765 (Cores 123-765C-58R to -55R) and Site 261 (Cores 27-261-33 to -27), Argo Abyssal Plain, off northwestern Australia is presented. Precise age determinations were limited by variable preservation and the exclusion of a number of marker species due to provincialism. However, the presence of species, such as, Stephanolithion bigotii bigotii, Watznaueria manivitae, Tubodiscus verenae, and Cruciellipsis cuvillieri results in a reasonably good degree of biostratigraphic control. Biogeographic interpretation of the nannofossil data suggests that the Argo Basin occupied a position transitional between the Tethyan and Austral nannofloral realms. A cooler water regime is suggested by the absence of thermophyllic Tethyan forms, such as Nannoconus, and the presence of taxa that display bipolar distribution, such as Crucibiscutum salebrosum. Two new species, Zeugrhabdotus cooperi and Cyclagelosphaera argoensis, and one new combination, Haqius ellipticus are described.
Supplement to: Bown, Paul R (1992): New calcareous nannofossil taxa from the Jurassic/Cretaceous boundary interval of sites 765 and 261, Argo Abyssal Plain. In: Gradstein, FM; Ludden, JN; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 123, 369-379
117.5752
117.8927
-15.976
-12.9472
Indian Ocean//PLAIN
South Indian Ridge, South Indian Ocean