10.1594/PANGAEA.761364
de Kaenel, Eric P
Eric P
de Kaenel
Bergen, James A
James A
Bergen
Calcareous nannofossils of ODP Sites 149-897 and 149-901
PANGAEA
1996
Drilling/drill rig
Leg149
Joides Resolution
Ocean Drilling Program (ODP)
1993-04-02T04:00:00/1993-05-24T13:10:00
en
Supplementary Publication Series of Datasets
10.2973/odp.proc.sr.149.206.1996
4 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Mesozoic calcareous nannofossil assemblages recovered during Ocean Drilling Program Leg 149 from the Iberia Abyssal Plain off the coast of Portugal were examined to determine the age of the rifting processes that affected the western Iberia Margin.
Dark carbonaceous claystones (black shales) recovered from Site 901 contain highly diverse and abundant Tithonian calcareous nannofossil assemblages. Careful examination and documentation of this material has extended the ranges of numerous Jurassic and Cretaceous species and detailed a significant Late Jurassic assemblage turnover observed in the calcareous nannofossil record.
The Lower Cretaceous sequence consists of intervals of serpentinized peridotite intercalated between various breccias and dark claystones. With the exception of a few samples, calcareous nannofossils are few and moderately preserved. The age of nannofossils within these varied sedimentary lithologies ranges from the late Barremian to the late Aptian.
Eight new species are described: Ansulasphaera covingtonii, Clepsilithus meniscus, Conusphaera sinespina, Crepidolithus parvulus, Diazomatholithus galicianus, Percivalia arata, Rotelapillus pleoseptatus, and Tranolithus incus. Also proposed are five new combinations.
Supplement to: de Kaenel, Eric P; Bergen, James A (1996): Mesozoic Calcareous Nannofossil Biostratigraphy from Sites 897, 899, and 901, Iberia Abyssal Plain: New Biostratigraphic Evidence. In: Whitmarsh, RB; Sawyer, DS; Klaus, A & Masson, DG (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 149, 27-59
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-11.05970000000002
40.6746
40.8388
South Atlantic Ocean