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Journal of the Geological Society; 1992; v. 149; issue.1; p. 7-12;
DOI: 10.1144/gsjgs.149.1.0007
© 1992 Geological Society of London

Article

Dinoflagellate cyst biostratigraphy of the last 2.3 Ma from the Rockall Plateau, northeast Atlantic Ocean

REX HARLAND

Biostratigraphy and Sedimentology Group, British Geological Survey, Keyworth, Nottingham NGI2 5GG, UK

The organic-walled dinoflagellate cyst record for Hole 552A of Leg 81 of the Deep Sea Drilling Project is extended to 2.3 Ma. Peaks of dinoflagellate cyst recovery are noted for isotope stages 19, 23, 25 and two unnumbered stages in Cores 7 and 8. Impagidinium cysts are persistently present throughout and especially prominent in the older sediments of Cores 7 and 8 where they are the characteristic component of the oxygen-light units. Younger dinoflagellate cyst assemblages from isotope stages 19, 23 and 25 characteristically contain Nematosphaeropsis labyrinthus (Ostenfeld) Reid, Operculodinium centrocarpum (Deflandre & Cookson) Wall and Spiniferites spp., and are comparable to those recovered from sediments deposited over the last 0.7 Ma. This correlation of dinoflagellate cysts with the oxygen isotope stratigraphy over the last 2.3 Ma may provide a reference section for the eastern North Atlantic Ocean on the western flank of the Rockall Plateau.





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 The HoloceneHome page
R. Harland and J. A. Howe
Dinoflagellate cysts and Holocene oceanography of the northeastern Atlantic Ocean
The Holocene, 1995; 5: 220 - 228.
[Abstract] [PDF]