Mid-Miocene planktonic foraminifera of the Kerguelen Plateau, Antarctica ...
Miocene deep-sea sediments from ODP Site 744 (Kerguelen Plateau, southern Indian Ocean) contain abundant and diverse planktonic foraminiferal assemblages. Their analysis led to the identification of the interval between 17.0 and 14.2 Ma as a time of mid-Miocene warmth, which is investigated here in...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2002
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| Online Access: | https://dx.doi.org/10.1594/pangaea.678478 https://doi.pangaea.de/10.1594/PANGAEA.678478 |
| Summary: | Miocene deep-sea sediments from ODP Site 744 (Kerguelen Plateau, southern Indian Ocean) contain abundant and diverse planktonic foraminiferal assemblages. Their analysis led to the identification of the interval between 17.0 and 14.2 Ma as a time of mid-Miocene warmth, which is investigated here in detail. This investigation includes reconstruction of trends in foraminiferal faunal composition and diversity through time, as well as in morphology and coiling direction within Globorotalia praescitula and Globorotalia zealandica plexi. These two large-globorotaliid plexi constitute the most characteristic component of the mid-Miocene foraminiferal faunas at ODP Site 744. Selected benthic (Cibicidoides sp.) and planktonic foraminifera were also analyzed for delta18O and delta13C ratios. Distinctive planktonic assemblages were the basis for identification of three foraminiferal biofacies between 17.0 and 14.2 Ma. The most prominent faunal changes took place between Biofacies 2 and 3 (15.5-15.0 Ma). Six of 11 ... : Supplement to: Majewski, Wojciech (2002): Mid-Miocene invasion of ecological niches by planktonic foraminifera of the Kerguelen Plateau, Antarctica. Marine Micropaleontology, 46(1-2), 59-81 ... |
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