Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean
Two different biostratigraphic approaches are used to identify Marine Isotope Stage 11 (MIS 11) in Arctic Ocean sediments. On the Lomonosov Ridge, globally calibrated nannofossil bioevents constrain the age of sediments back to MIS 13 (Core LOMROG12-3PC). In the Amerasian Basin the unique occurrence...
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2021
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ftdoajarticles:oai:doaj.org/article:ba3ae28ed17b417ea07094707f154429 2023-05-15T13:20:24+02:00 Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean Flor Vermassen Matt O’Regan Gabriel West Thomas M. Cronin Helen K. Coxall 2021-01-01T00:00:00Z https://doi.org/10.1080/15230430.2021.1988356 https://doaj.org/article/ba3ae28ed17b417ea07094707f154429 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2021.1988356 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.1988356 https://doaj.org/article/ba3ae28ed17b417ea07094707f154429 Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 309-323 (2021) arctic biostratigraphy foraminifera geochronology paleoceanography Environmental sciences GE1-350 Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1080/15230430.2021.1988356 2022-12-31T04:10:52Z Two different biostratigraphic approaches are used to identify Marine Isotope Stage 11 (MIS 11) in Arctic Ocean sediments. On the Lomonosov Ridge, globally calibrated nannofossil bioevents constrain the age of sediments back to MIS 13 (Core LOMROG12-3PC). In the Amerasian Basin the unique occurrence of the planktonic foraminifer Turborotalita egelida is increasingly used as a marker for MIS 11. However, the T. egelida horizon has only been dated using cyclostratigraphy. Here we bridge these approaches through investigation of a new core (AO16-8GC) from the Alpha Ridge, Amerasian Basin. AO16-8GC is easily correlated to LOMROG12-3PC and contains the T. egelida horizon, allowing the first comparison between the biostratigraphy of both regions. Based on the nannofossil biochronology of LOMROG12-3PC, the most convincing lithologic correlation between the Alpha and Lomonosov Ridge cores places the T. egelida horizon between MIS 15 and MIS 17. This potentially older age for the T. egelida biohorizon emphasizes the need for continued caution in interpreting paleoceanographic records predating MIS 6, until further work can reconcile the nanno- and microfossil biostratigraphies that are emerging for middle Pleistocene sediments of the central Arctic Ocean. Article in Journal/Newspaper alpha ridge Antarctic and Alpine Research Arctic Arctic Arctic Ocean Foraminifera* Lomonosov Ridge Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Alpha Ridge ENVELOPE(-120.000,-120.000,85.500,85.500) Arctic, Antarctic, and Alpine Research 53 1 309 323 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
arctic biostratigraphy foraminifera geochronology paleoceanography Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
arctic biostratigraphy foraminifera geochronology paleoceanography Environmental sciences GE1-350 Ecology QH540-549.5 Flor Vermassen Matt O’Regan Gabriel West Thomas M. Cronin Helen K. Coxall Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
topic_facet |
arctic biostratigraphy foraminifera geochronology paleoceanography Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
Two different biostratigraphic approaches are used to identify Marine Isotope Stage 11 (MIS 11) in Arctic Ocean sediments. On the Lomonosov Ridge, globally calibrated nannofossil bioevents constrain the age of sediments back to MIS 13 (Core LOMROG12-3PC). In the Amerasian Basin the unique occurrence of the planktonic foraminifer Turborotalita egelida is increasingly used as a marker for MIS 11. However, the T. egelida horizon has only been dated using cyclostratigraphy. Here we bridge these approaches through investigation of a new core (AO16-8GC) from the Alpha Ridge, Amerasian Basin. AO16-8GC is easily correlated to LOMROG12-3PC and contains the T. egelida horizon, allowing the first comparison between the biostratigraphy of both regions. Based on the nannofossil biochronology of LOMROG12-3PC, the most convincing lithologic correlation between the Alpha and Lomonosov Ridge cores places the T. egelida horizon between MIS 15 and MIS 17. This potentially older age for the T. egelida biohorizon emphasizes the need for continued caution in interpreting paleoceanographic records predating MIS 6, until further work can reconcile the nanno- and microfossil biostratigraphies that are emerging for middle Pleistocene sediments of the central Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Flor Vermassen Matt O’Regan Gabriel West Thomas M. Cronin Helen K. Coxall |
author_facet |
Flor Vermassen Matt O’Regan Gabriel West Thomas M. Cronin Helen K. Coxall |
author_sort |
Flor Vermassen |
title |
Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
title_short |
Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
title_full |
Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
title_fullStr |
Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
title_full_unstemmed |
Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean |
title_sort |
testing the stratigraphic consistency of pleistocene microfossil bioevents identified on the alpha and lomonosov ridges, arctic ocean |
publisher |
Taylor & Francis Group |
publishDate |
2021 |
url |
https://doi.org/10.1080/15230430.2021.1988356 https://doaj.org/article/ba3ae28ed17b417ea07094707f154429 |
long_lat |
ENVELOPE(-120.000,-120.000,85.500,85.500) |
geographic |
Arctic Arctic Ocean Alpha Ridge |
geographic_facet |
Arctic Arctic Ocean Alpha Ridge |
genre |
alpha ridge Antarctic and Alpine Research Arctic Arctic Arctic Ocean Foraminifera* Lomonosov Ridge |
genre_facet |
alpha ridge Antarctic and Alpine Research Arctic Arctic Arctic Ocean Foraminifera* Lomonosov Ridge |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 309-323 (2021) |
op_relation |
http://dx.doi.org/10.1080/15230430.2021.1988356 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.1988356 https://doaj.org/article/ba3ae28ed17b417ea07094707f154429 |
op_doi |
https://doi.org/10.1080/15230430.2021.1988356 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
53 |
container_issue |
1 |
container_start_page |
309 |
op_container_end_page |
323 |
_version_ |
1766353195356913664 |