Mar 1, 2017

East Antarctic ice sheet stability recorded in a high-elevation ice-cored moraine

  • East Antarctic blue ice moraines record quasi-continuous ice sheet history
  • Sharp pebble composition changes across the moraine indicate geomorphic stability
  • Detrital zircons in till are dominantly from the lower Beacon Supergroup
  • Provenance methodology (pebble vs zircon) indicates different apparent debris sources
  • Rock types across moraine show reverse Beacon Supergroup stratigraphy