(Table 1) Dinoflagellate cysts and acritarchs in upper Pliocene and Pleistocene sediments from ODP Hole 151-911A


Pliocene and Pleistocene sediments from Ocean Drilling Program Leg 151, Hole 911 A, drilled on the innermost Yermak Plateau (Eastern Arctic Ocean), were studied for their dinoflagellate cyst content. Three assemblage zones were tentatively defined, characterized by the predominance of few species. The composition of the assemblages changed markedly, even within single assemblage zones, during the last 2.6 to 2.8 m.y., reflecting the variable influence of warmer water from the Norwegian Sea, fluctuations in the influence of cold polar water masses, and the extent of sea-ice cover. Polar to subpolar surface water masses prevailed on the Yermak Plateau during the late Pliocene, when the eastern Arctic Ocean was probably isolated from the Norwegian-Greenland Sea. Intrusions of warmer water are recorded since the latest Pliocene, alternating with colder periods and a prolonged seasonal sea-ice cover. The composition of the dinoflagellate cyst assemblages has also changed considerably since the middle Pleistocene, reflecting the establishment of stronger fluctuations in surface water mass conditions than before at Yermak Plateau.

Supplement to: Matthiessen, Jens; Brenner, Wolfram W (1996): Dinoflagellate Cyst Ecostratigraphy of Plioceneā€“Pleistocene Sediments from the Yermak Plateau (Arctic Ocean, Hole 911A). In: Thiede, J; Myhre, AM; Firth, JV; Johnsin, GL & Ruddiman, WF (eds.) Proceedings of the Ocean Drilling Program, Scientific Results; College Station, Texas (Ocean Drilling Program), 151, 243-253

DOI https://doi.org/10.1594/PANGAEA.761371
Related Identifier https://doi.org/10.2973/odp.proc.sr.151.109.1996
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.761371
Creator Matthiessen, Jens ; Brenner, Wolfram W
Publisher PANGAEA
Publication Year 1996
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 1440 data points
Discipline Earth System Research
Spatial Coverage (8.227 LON, 80.477 LAT); North Greenland Sea
Temporal Coverage Begin 1993-08-22T06:15:00Z
Temporal Coverage End 1993-08-26T21:34:00Z