Summary of foraminifer and ice rafted debris counts from ODP Site 162-982 ...

• Main Authors: Huber, Robert, Baumann, Karl-Heinz
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Sample code/label; Depth, composite; AGE; Foraminifera, planktic; Neogloboquadrina pachyderma sinistral; Foraminifera, planktic, subpolar; Foraminifera, benthic; Ice rafted debris; Composite Core; Intercore correlation; Counting 125-500 µm fraction; Leg162; Joides Resolution; Ocean Drilling Program ODP; Norwegian Sea; Rockall Plateau; Neogloboquadrina pachyderma; North Atlantic; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.884356; https://doi.pangaea.de/10.1594/PANGAEA.884356

Records of bulk carbonate content, ice-rafted detritus (IRD), planktonic foraminifers, and coccolithophores of Ocean Drilling Program Site 982 from the Rockall Plateau and Site 985 from the Norwegian Sea are compared to determine the variability of the south-north gradients in surface water since ~3.1 Ma.The onset of the major Northern Hemisphere glaciation appears time-transgressively between the sites, as indicated by both a noticeable increase in IRD and marked decrease in carbonate. Thus, each site is recording a somewhat different manifestation of the larger processes that occurred in the interval 2.8 to ~1.1 Ma. Although the interval since ~2.5 Ma was a climatically unstable time interval in the North Atlantic, sedimentation is largely composed of calcareous biogenics at Site 982. Minimum carbonate contents, however, result primarily from dilution by IRD during glacials. In contrast, at Site 985 glacial conditions, probably with discontinuous sea-ice cover, dominated throughout until 1.1 Ma as shown by ... : Supplement to: Baumann, Karl-Heinz; Huber, Robert (1999): Sea-surface gradients between the North Atlantic and the Norwegian Sea during the last 3.1 m.y.: comparison of Sites 982 and 985. In: Raymo, M.E.; Jansen, E.; Blum, P.; Herbert, T.D. (eds.), Proceedings of the Ocean Drilling Program, 162 Scientific Results, Proceedings of the Ocean Drilling Program, 162, Ocean Drilling Program, Proceedings of the Ocean Drilling Program Scientific Results, 162, 179-190 ...