Planktic foraminifera at the Paleocene-Eocene transition in the Antarctic Indian Ocean ...
Isotopic depth stratification and relative abundance studies of planktic foraminifera at ODP Site 738 reveal three major faunal turnovers during the latest Paleocene and early Eocene, reflecting the climatic and structural changes in the Antarctic surface ocean.Faunal Event 1 occurred near the Paleo...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
1993
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| Online Access: | https://dx.doi.org/10.1594/pangaea.683876 https://doi.pangaea.de/10.1594/PANGAEA.683876 |
| Summary: | Isotopic depth stratification and relative abundance studies of planktic foraminifera at ODP Site 738 reveal three major faunal turnovers during the latest Paleocene and early Eocene, reflecting the climatic and structural changes in the Antarctic surface ocean.Faunal Event 1 occurred near the Paleocene/Eocene boundary and is characterized by a faunal turnover in deep dwellers, decreased relative abundance in intermediate dwellers and increased relative abundance in surface dwellers. This event marks a temporary elimination of the vertical structure in the surface ocean over a period of more than 63,000 years that is apparently associated with the sudden shutdown of the "Antarctic Intermediate Water" production. The appearance of morozovellids before this event suggests that polar warming is the cause for the shutdown in the production of this water mass. At this time warm saline deep water may have formed at low latitudes.Faunal Event 2 occurred near the AP5a/AP5b Subzonal boundary and is characterized by a ... : Supplement to: Lu, Gangyi; Keller, Gerta (1993): The Paleocene-Eocene transition in the Antarctic Indian Ocean: Inference from planktic foraminifera. Marine Micropaleontology, 21(1-3), 101-142 ... |
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