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Osterman, Lisa Ellen; Poore, Richard Z; Barron, John A (2001): Micropaleontology and stable isotope record of ODP Hole 178-1098C. PANGAEA,, Supplement to: Osterman, LE et al. (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,

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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 foraminifers in the laminated sediments demonstrates that the laminations do not represent anoxic conditions. The uniform composition of the agglutinated foraminifer fauna throughout the late Holocene suggests that the Palmer Deep did not experience bottom-water-mass changes associated with the alternating deposition of bioturbated or laminated sediments.
Latitude: -64.861830 * Longitude: -64.207810
Date/Time Start: 1998-03-13T00:00:00 * Date/Time End: 1998-03-13T00:00:00
178-1098C * Latitude: -64.861830 * Longitude: -64.207810 * Date/Time: 1998-03-13T00:00:00 * Elevation: -1010.4 m * Penetration: 46.7 m * Recovery: 46.3 m * Location: Drake Passage * Campaign: Leg178 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46.7 m cored; 0 m drilled; 99.1 % recovery
8 datasets

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Datasets listed in this publication series

  1. Osterman, LE; Poore, RZ; Barron, JA (2001): (Appendix B) Stable carbon and oxygen isotope ratios of Bulimina aculeata from ODP Hole 178-1098C.
  2. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T1) Abundance and diversity of benthic foraminifers of ODP Hole 178-1098C.
  3. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T10) Benthic calcareous and agglutinated foraminifers in one sample from interval D, ODP Hole 178-1098C.
  4. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T2) Percentage and absolute abundance of major diatom species in ODP Hole 178-1098C.
  5. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T3) Ratio of symmetric to asymmetric forms of Eucampia antarctica in ODP Hole 178-1098C.
  6. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T4, T5, T6, T7) Percentage of agglutinated and calcareous benthic foraminiferal species in ODP Hole 178-1098C.
  7. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T8) Occurrence of Neogloboquadrina pachyderma in ODP Hole 178-1098C.
  8. Osterman, LE; Poore, RZ; Barron, JA (2001): (Table T9) Comparison of samples due to dissolution of benthic calcareous foraminifers in the core repository, ODP Hole 178-1098C.