Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410)
The interval spanning from the Early Eocene Climatic Optimum (EECO) to the onset of long-term cooling in the middle Eocene is marked by prominent changes in calcareous nannofossil assemblages and coincides with modification of the North Atlantic deep-ocean circulation. Here we present an integrated...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.905432 2023-05-15T17:22:55+02:00 Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) Cappelli, Carlotta Bown, Paul R Westerhold, Thomas Bohaty, Steven M de Riu, Martina Lobba, Veronica Yamamoto, Yuhji Agnini, Claudia MEDIAN LATITUDE: 41.357497 * MEDIAN LONGITUDE: -49.333994 * SOUTH-BOUND LATITUDE: 41.328140 * WEST-BOUND LONGITUDE: -49.785805 * NORTH-BOUND LATITUDE: 41.438315 * EAST-BOUND LONGITUDE: -49.169745 2019-09-02 application/zip, 15 datasets https://doi.pangaea.de/10.1594/PANGAEA.905432 https://doi.org/10.1594/PANGAEA.905432 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.905432 https://doi.org/10.1594/PANGAEA.905432 CC0: Creative Commons Zero 1.0 Universal Access constraints: unrestricted info:eu-repo/semantics/openAccess CC0 Supplement to: Cappelli, Carlotta; Bown, Paul R; Westerhold, Thomas; Bohaty, Steven M; de Riu, Martina; Lobba, Veronica; Yamamoto, Yuhji; Agnini, Claudia (2019): The early to middle Eocene transition: an integrated calcareous nannofossil and stable isotope record from the Northwest Atlantic Ocean (IODP Site U1410). Paleoceanography and Paleoclimatology, 34(12), 1913-1930, https://doi.org/10.1029/2019PA003686 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.905432 https://doi.org/10.1029/2019PA003686 2023-01-20T07:34:23Z The interval spanning from the Early Eocene Climatic Optimum (EECO) to the onset of long-term cooling in the middle Eocene is marked by prominent changes in calcareous nannofossil assemblages and coincides with modification of the North Atlantic deep-ocean circulation. Here we present an integrated calcareous nannoplakton and bulk stable isotope records (δ18O and δ13C) across the early-middle Eocene (~52- 43 Ma) from IODP Site U1410 (northwest Atlantic), where middle Eocene deposits occur as clay-rich drift sediments reflecting the formation of persistent deep currents. Abundance patterns of selected biostratigraphically relevant taxa encompassing Ypresian-Lutetian calcareous nannofossil Zones CNE4-CNE12 served to test the biostratigraphic reliability of the species. In addition, long- and short-term trends documented in geochemical data have been used to determine the temporal relationships between palaeoenvironmental trends and changes in calcareous nannofossil assemblages. After the EECO to the Ypresian-Lutetian boundary, calcareous nannofossils switched from an assemblage mainly composed of warm-water and oligotrophic taxa (Zygrhablithus, Discoaster, Sphenolithus, Coccolithus) to one dominated by the more temperate and eutrophic reticulofenestrids. This prominent change occurred during a phase of relatively high δ18O values likely related to the post-EECO cooling. Although the dominance of reticulofenestrids persisted unvaried throughout the study middle Eocene interval, early Lutetian stable isotope records indicate a reversal in the paleoenvironmetal trends suggesting a temporary restoration of warmer conditions associated with an increase in abundance of D. sublodoensis. These results confirm previous records of environmental instability but the comparison of our results with different dataset highlights a global enigmatic scenario in term of bio-chemo-magnetostratigraphy. Dataset Newfoundland North Atlantic Northwest Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-49.785805,-49.169745,41.438315,41.328140) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Cappelli, Carlotta Bown, Paul R Westerhold, Thomas Bohaty, Steven M de Riu, Martina Lobba, Veronica Yamamoto, Yuhji Agnini, Claudia Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
description |
The interval spanning from the Early Eocene Climatic Optimum (EECO) to the onset of long-term cooling in the middle Eocene is marked by prominent changes in calcareous nannofossil assemblages and coincides with modification of the North Atlantic deep-ocean circulation. Here we present an integrated calcareous nannoplakton and bulk stable isotope records (δ18O and δ13C) across the early-middle Eocene (~52- 43 Ma) from IODP Site U1410 (northwest Atlantic), where middle Eocene deposits occur as clay-rich drift sediments reflecting the formation of persistent deep currents. Abundance patterns of selected biostratigraphically relevant taxa encompassing Ypresian-Lutetian calcareous nannofossil Zones CNE4-CNE12 served to test the biostratigraphic reliability of the species. In addition, long- and short-term trends documented in geochemical data have been used to determine the temporal relationships between palaeoenvironmental trends and changes in calcareous nannofossil assemblages. After the EECO to the Ypresian-Lutetian boundary, calcareous nannofossils switched from an assemblage mainly composed of warm-water and oligotrophic taxa (Zygrhablithus, Discoaster, Sphenolithus, Coccolithus) to one dominated by the more temperate and eutrophic reticulofenestrids. This prominent change occurred during a phase of relatively high δ18O values likely related to the post-EECO cooling. Although the dominance of reticulofenestrids persisted unvaried throughout the study middle Eocene interval, early Lutetian stable isotope records indicate a reversal in the paleoenvironmetal trends suggesting a temporary restoration of warmer conditions associated with an increase in abundance of D. sublodoensis. These results confirm previous records of environmental instability but the comparison of our results with different dataset highlights a global enigmatic scenario in term of bio-chemo-magnetostratigraphy. |
format |
Dataset |
author |
Cappelli, Carlotta Bown, Paul R Westerhold, Thomas Bohaty, Steven M de Riu, Martina Lobba, Veronica Yamamoto, Yuhji Agnini, Claudia |
author_facet |
Cappelli, Carlotta Bown, Paul R Westerhold, Thomas Bohaty, Steven M de Riu, Martina Lobba, Veronica Yamamoto, Yuhji Agnini, Claudia |
author_sort |
Cappelli, Carlotta |
title |
Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
title_short |
Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
title_full |
Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
title_fullStr |
Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
title_full_unstemmed |
Revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle Eocene interval at Southeast Newfoundland Ridge (Sites U1408, U1410) |
title_sort |
revised composite depth scale, calcareous nannofossil and stable isotope data of the early-middle eocene interval at southeast newfoundland ridge (sites u1408, u1410) |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.905432 https://doi.org/10.1594/PANGAEA.905432 |
op_coverage |
MEDIAN LATITUDE: 41.357497 * MEDIAN LONGITUDE: -49.333994 * SOUTH-BOUND LATITUDE: 41.328140 * WEST-BOUND LONGITUDE: -49.785805 * NORTH-BOUND LATITUDE: 41.438315 * EAST-BOUND LONGITUDE: -49.169745 |
long_lat |
ENVELOPE(-49.785805,-49.169745,41.438315,41.328140) |
genre |
Newfoundland North Atlantic Northwest Atlantic |
genre_facet |
Newfoundland North Atlantic Northwest Atlantic |
op_source |
Supplement to: Cappelli, Carlotta; Bown, Paul R; Westerhold, Thomas; Bohaty, Steven M; de Riu, Martina; Lobba, Veronica; Yamamoto, Yuhji; Agnini, Claudia (2019): The early to middle Eocene transition: an integrated calcareous nannofossil and stable isotope record from the Northwest Atlantic Ocean (IODP Site U1410). Paleoceanography and Paleoclimatology, 34(12), 1913-1930, https://doi.org/10.1029/2019PA003686 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.905432 https://doi.org/10.1594/PANGAEA.905432 |
op_rights |
CC0: Creative Commons Zero 1.0 Universal Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.1594/PANGAEA.905432 https://doi.org/10.1029/2019PA003686 |
_version_ |
1766109833859170304 |