USAP-DC

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Grain-size data for the Pliocene section of ODP Site 1097 Data DOI: https://doi.org/10.15784/602085 Cite as Passchier, S., & Joseph, R. (2026) "Grain-size data for the Pliocene section of ODP Site 1097" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/602085. Abstract This dataset contains measurements of particle-size distributions on sediment from Ocean Discovery Program Site 1097. Carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2 and 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 3000 with a Hydro EV accessory, using a Refractive index of 1.6 (Illite) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles. Creator(s): Passchier, Sandra; Joseph, Ridley Date Created: 2026-08-26 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -70.756402, East: -70.756402, South: -66.3928, North: -66.3928 Award(s) NSF 2114839 Version: 1 Related Project(s) West Antarctic Ice-sheet Change and Paleoceanography in the Amundsen Sea Across the Pliocene Climatic Optimum References Sandra Passchier, Ridley Joseph, Monika Ghimire, Xiaona Li, 2026. Early Pliocene drawdown followed by expansion of the Antarctic Peninsula Ice Sheet in Marguerite Bay. Marine Geology. Keywords Antarctic Peninsula Antarctica Cryosphere Grain Size ODP ODP 1097 Pliocene Sediment