The last occurrence of Proboscia curvirostris in the North Atlantic marine isotope stage 9-8, supplement to: Koç, Nalân; Labeyrie, Laurent D; Manthé, Sandrine; Flower, Benjamin P; Hodell, David A; Aksu, Ali E (2001): The last occurrence of Proboscia curvirostris in the North Atlantic marine isotope stages 9-8. Marine Micropaleontology, 41(1-2), 9-23

DOI

Well-preserved diatoms are present in high sedimentation rate Pleistocene cores retrieved on Ocean Drilling Program (ODP) Legs 151, 152, 162 and IMAGES cruises of R/V Marion Dufresne from the North Atlantic. Investigation of the stratigraphic occurrence of diatom species shows that the youngest diatom event observed in the area is the last occurrence (LO) of Proboscia curvirostris (Jousé) Jordan and Priddle. P. curvirostris is a robust species that can easily be identified in the sediments, and therefore can be a practical biostratigraphic tool. We have mapped its areal distribution, and found that it stretches from 40°N to 80°N in the North Atlantic. Further, we have correlated the LO P. curvirostris to the oxygen isotope records of six cores to refine the age of this biostratigraphic event. The extinction of P. curvirostris is latitudinally diachronous through Marine Isotope Stages (MIS) 9 to 8 within the North Atlantic. This is closely related to the paleoceanography of the area. P. curvirostris first disappeared within interglacial MIS 9 (324 ka) from the northern areas that are most sensitive to climatic forcing, like the East Greenland current and the sea-ice margin. It survived in mid-North Atlantic until the conditions of the MIS 8 (glaciation) became too severe (260 ka). In the North Pacific at ODP Site 883 the LO P. curvirostris falls within MIS 8. The observed overlap in age between the North Atlantic and the North Pacific strongly suggests that the extinction of P. curvirostris is synchronous between these oceans.

Identifier
DOI https://doi.org/10.1594/PANGAEA.678543
Related Identifier https://doi.org/10.1016/S0377-8398(00)00054-2
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.678543
Provenance
Creator Koç, Nalân; Labeyrie, Laurent D; Manthé, Sandrine; Flower, Benjamin P; Hodell, David A; Aksu, Ali E
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2001
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Collection of Datasets; Collection
Format application/zip
Size 6 datasets
Discipline Earth System Research
Spatial Coverage (-47.413W, 41.745S, -22.075E, 62.670N); Greenland Sea; North Atlantic Ocean; Iceland; Newfoundland Slope
Temporal Coverage Begin 1993-11-13T09:14:00Z
Temporal Coverage End 1995-07-22T09:29:00Z