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Magnetostratigraphically-calibrated dinoflagellate cyst bioevents for the uppermost Eocene to lowermost Miocene of the western North Atlantic (IODP Expedition 342, Paleogene Newfoundland sediment drifts)

Magnetostratigraphically-calibrated dinoflagellate cyst bioevents for the uppermost Eocene to lowermost Miocene of the western North Atlantic (IODP Expedition 342, Paleogene Newfoundland sediment drifts)
Magnetostratigraphically-calibrated dinoflagellate cyst bioevents for the uppermost Eocene to lowermost Miocene of the western North Atlantic (IODP Expedition 342, Paleogene Newfoundland sediment drifts)
The Oligocene epoch represents a somewhat neglected chapter in paleoclimate and paleoceanographic history, which is at least partially due to the scarcity of complete Oligocene sedimentary archives and poor biostratigraphic age control. Many of the biotic events registered in Oligocene microfossils are strongly diachronous across latitudes as a response to increased global cooling and enhanced meridional temperature gradients. To improve biostratigraphic age control for the Oligocene of the North Atlantic Ocean, we carried out a high-resolution study of dinoflagellate cysts from Integrated Ocean Drilling Program (IODP) Sites U1405, U1406 and U1411 off Newfoundland. Together the sites comprise an apparently complete uppermost Eocene (34.9 Ma) to lowermost Miocene (21.7 Ma) sequence with good magnetostratigraphic age control. This allows us to firmly tie identified dinoflagellate cyst bioevents to the geomagnetic polarity timescale. In the dinoflagellate cyst assemblages studied we have identified and magnetostratigraphically-calibrated ten first and 19 last appearance datums. Our magnetostratigraphically-calibrated dinocyst-based biostratigraphy, which is based on an average sample resolution of a sample every ~ 150 kyrs, will contribute to an improved age framework for future paleoceanographical studies in the higher-latitude North Atlantic.
Paleogene, Oligocene, Biostratigraphy, Dinoflagellates, North Atlantic, Integrated Ocean Drilling Program
0034-6667
159-185
Egger, Lisa M.
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Śliwińska, Katarzyna K.
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Van Peer, Tim E.
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Liebrand, Diederik
bef7cbd7-4fa7-453c-9961-c950a5b87795
Lippert, Peter C.
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Friedrich, Oliver
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Wilson, Paul A.
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Norris, Richard D.
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Pross, Jörg
7c848424-852f-467b-90f0-19d4f8d4ae01
Egger, Lisa M.
6fc5b4c3-694b-4532-8284-9ba107e4645e
Śliwińska, Katarzyna K.
ef8517ca-3950-44d3-948f-ce3749014f17
Van Peer, Tim E.
da231293-36c0-4d9f-b86c-8b1f059b5134
Liebrand, Diederik
bef7cbd7-4fa7-453c-9961-c950a5b87795
Lippert, Peter C.
65409dec-6fd8-455e-8e4a-225dba999ce6
Friedrich, Oliver
680f066c-a4b1-4647-beb3-281addc1ee17
Wilson, Paul A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Norris, Richard D.
9e0dfa1e-0c69-4666-bbf9-a5a14909d8f9
Pross, Jörg
7c848424-852f-467b-90f0-19d4f8d4ae01

Egger, Lisa M., Śliwińska, Katarzyna K., Van Peer, Tim E., Liebrand, Diederik, Lippert, Peter C., Friedrich, Oliver, Wilson, Paul A., Norris, Richard D. and Pross, Jörg (2016) Magnetostratigraphically-calibrated dinoflagellate cyst bioevents for the uppermost Eocene to lowermost Miocene of the western North Atlantic (IODP Expedition 342, Paleogene Newfoundland sediment drifts). Review of Palaeobotany and Palynology, 234, 159-185. (doi:10.1016/j.revpalbo.2016.08.002).

Record type: Article

Abstract

The Oligocene epoch represents a somewhat neglected chapter in paleoclimate and paleoceanographic history, which is at least partially due to the scarcity of complete Oligocene sedimentary archives and poor biostratigraphic age control. Many of the biotic events registered in Oligocene microfossils are strongly diachronous across latitudes as a response to increased global cooling and enhanced meridional temperature gradients. To improve biostratigraphic age control for the Oligocene of the North Atlantic Ocean, we carried out a high-resolution study of dinoflagellate cysts from Integrated Ocean Drilling Program (IODP) Sites U1405, U1406 and U1411 off Newfoundland. Together the sites comprise an apparently complete uppermost Eocene (34.9 Ma) to lowermost Miocene (21.7 Ma) sequence with good magnetostratigraphic age control. This allows us to firmly tie identified dinoflagellate cyst bioevents to the geomagnetic polarity timescale. In the dinoflagellate cyst assemblages studied we have identified and magnetostratigraphically-calibrated ten first and 19 last appearance datums. Our magnetostratigraphically-calibrated dinocyst-based biostratigraphy, which is based on an average sample resolution of a sample every ~ 150 kyrs, will contribute to an improved age framework for future paleoceanographical studies in the higher-latitude North Atlantic.

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Egger et al. 2016_manuscript.pdf - Accepted Manuscript
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Accepted/In Press date: 14 August 2016
e-pub ahead of print date: 18 August 2016
Published date: 1 November 2016
Keywords: Paleogene, Oligocene, Biostratigraphy, Dinoflagellates, North Atlantic, Integrated Ocean Drilling Program
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 402924
URI: http://eprints.soton.ac.uk/id/eprint/402924
ISSN: 0034-6667
PURE UUID: eeb66fa6-f192-4bb9-bd99-66e792b78df4
ORCID for Tim E. Van Peer: ORCID iD orcid.org/0000-0003-3516-4198
ORCID for Paul A. Wilson: ORCID iD orcid.org/0000-0001-6425-8906

Catalogue record

Date deposited: 15 Nov 2016 13:42
Last modified: 16 Mar 2024 03:13

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Contributors

Author: Lisa M. Egger
Author: Katarzyna K. Śliwińska
Author: Tim E. Van Peer ORCID iD
Author: Diederik Liebrand
Author: Peter C. Lippert
Author: Oliver Friedrich
Author: Paul A. Wilson ORCID iD
Author: Richard D. Norris
Author: Jörg Pross

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