Citation:

odp.proc.sr.149.206.1996

Name: Calcareous nannofossils of ODP Sites 149-897 and 149-901
Published: 1996
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

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.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: 40.781075 * Median Longitude: -12.069150 * South-bound Latitude: 40.674600 * West-bound Longitude: -12.475200 * North-bound Latitude: 40.838800 * East-bound Longitude: -11.059700

Date/Time Start: 1993-04-02T04:00:00 * Date/Time End: 1993-05-24T13:10:00

Event(s):

149-897B * Latitude: 40.838700 * Longitude: -12.474000 * Date/Time Start: 1993-04-01T07:30:00 * Date/Time End: 1993-04-02T04:00:00 * Elevation: -5331.0 m * Penetration: 62 m * Location: North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 10 m cored; 52 m drilled; 0 % recovery

149-897D * Latitude: 40.838500 * Longitude: -12.475200 * Date/Time Start: 1993-04-09T16:00:00 * Date/Time End: 1993-04-17T12:00:00 * Elevation: -5327.0 m * Penetration: 837.2 m * Recovery: 117.94 m * Location: North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 241.2 m cored; 596 m drilled; 48.9 % recovery

149-901A * Latitude: 40.674600 * Longitude: -11.059700 * Date/Time Start: 1993-05-22T18:30:00 * Date/Time End: 1993-05-24T13:10:00 * Elevation: -4730.0 m * Penetration: 247.8 m * Recovery: 4.89 m * Location: North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46.8 m cored; 0 m drilled; 10.4 % recovery

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

4 datasets

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Datasets listed in this publication series

de Kaenel, EP; Bergen, JA (1996): (Table 3) Stratigraphic distribution of calcareous nannofossil taxa from ODP Hole 149-897C. https://doi.org/10.1594/PANGAEA.761360
de Kaenel, EP; Bergen, JA (1996): (Table 4) Stratigraphic distribution of calcareous nannofossil taxa from ODP Hole 149-897D. https://doi.org/10.1594/PANGAEA.761361
de Kaenel, EP; Bergen, JA (1996): (Table 5) Stratigraphic distribution of calcareous nannofossil taxa from ODP Hole 149-899B. https://doi.org/10.1594/PANGAEA.761363
de Kaenel, EP; Bergen, JA (1996): (Table 2) Stratigraphic distribution of calcareous nannofossil taxa from ODP Hole 149-901A. https://doi.org/10.1594/PANGAEA.761358