Gavin Piccione, Brown University: A Sedimentary Archive of Antarctic Ice Sheet Oxygen Isotope Values from the Late Miocene

Sedimentary records of Antarctic Ice Sheet oxygen isotope compositions can supplement ice core records as archives of ice sheet and climate history. In this talk I will describe a new terrestrial record of the East Antarctic Ice Sheet oxygen composition, preserved in calcite and opal precipitates that form in the subglacial environment and are collected at the ice sheet surface in blue ice regions. Through a case study using samples from the Late Miocene, I will demonstrate how these samples can preserve δ18O signals from past ice sheets, offering new insights into Antarctic ice sheet evolution and its climate significance.

See COLDEX Slack Workspace, COLDEX Google Calendar, or email invitation for Zoom link, or email whittdan@oregonstate.edu