Micropaleontology and stable isotope record of ODP Hole 178-1098C ...

• Main Authors: Osterman, Lisa Ellen, Poore, Richard Z, Barron, John A
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2001
• Subjects: Drilling/drill rig; Leg178; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Antarctic Peninsula; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.735540; https://doi.pangaea.de/10.1594/PANGAEA.735540

Detailed study of four Holocene sediment intervals from Ocean Drilling Program Site 1098 (Palmer Deep, Antarctic Peninsula) reveals that in situ dissolution of calcareous foraminifers in the core repository has significantly altered and in some cases eliminated calcareous foraminifers. Despite dissolution, the foraminifer and supporting diatom data show that the most open-ocean and reduced sea-ice conditions occurred in the early Holocene. The influence of Circumpolar Deep Water was greatest during the early Holocene but continued to be important throughout the Holocene. An increase in sea-ice proximal diatoms at 3500 cal. BP documents an expansion in the amount of persistent sea ice. The inferred increase in sea ice corresponds with an overall increase in magnetic susceptibility values.Benthic foraminifers are present in all samples from the Palmer Deep, including the middle Holocene pervasively laminated sediments with low magnetic susceptibility values. The consistent presence of mobile epifaunal benthic ... : Supplement to: Osterman, Lisa Ellen; Poore, Richard Z; Barron, John A (2001): Climate variability of the Holocene, Site 1098, Palmer Deep, Antarctica. In: Barker, PF; Camerlenghi, A; Acton, GD; Ramsay, ATS (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 178, 1-45 ...