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

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doi: 10.1016/j.revpalbo.2016.08.002
Author(s): Egger, Lisa M.; Sliwinska, Katarzyna K.; van Peer, Tim E.; Liebrand, Diederik; Lippert, Peter C.; Friedrich, Oliver; Wilson, Paul A.; Norris, Richard D.; Pross, Jörg
Author Affiliation(s): Primary:
Heidelberg University, Institute of Earth Sciences, Heidelberg, Germany
Geological Survey of Denmark and Greenland, Denmark
University of Southampton, United Kingdom
University of Utah, United States
Scripps Institution of Oceanography, United States
Volume Title: Review of Palaeobotany and Palynology
Source: Review of Palaeobotany and Palynology, Vol.234, p.159-185. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0034-6667 CODEN: RPPYAX
Note: In English. 90 refs.; illus., incl. charts, 6 plates, 3 tables, sketch map
Summary: 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.
Year of Publication: 2016
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; 12 Stratigraphy, Historical Geology and Paleoecology; Assemblages; Atlantic Ocean; Biostratigraphy; Biozones; Canada; Cenozoic; Dinoflagellata; Eastern Canada; Eocene; Event stratigraphy; Expedition 342; Floral list; IODP Site U1405; IODP Site U1406; IODP Site U1411; Integrated Ocean Drilling Program; Lower Miocene; Magnetostratigraphy; Microfossils; Miocene; Neogene; Newfoundland; Newfoundland and Labrador; North Atlantic; Paleogene; Palynomorphs; Tertiary; Upper Eocene
Coordinates: N391330 N413707 W0485958 W0721635
Record ID: 2018063846
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands