Physical Sciences and Mathematics Commons^™

Nature And Dynamics Of Late Miocene/Early Pliocene Ice-Sheet Grounding Events On The Pacific Margin Of The Antarctic Pennisula Outer Continental Shelf, David C. Egan

LSU Master's Theses

Package-3 unconformities identified by Bart and Anderson (1995) were mapped to evaluate their glacial unconformity interpretation using a regional grid of single channel seismic data from the Antarctic Peninsula outer continental shelf. Detailed correlations show many crosscutting relationships within Package 3 such that the unconformities and units they bound are not regionally continuous across the margin. Comparison of Package-3 unconformities with the modern bathymetry reveals that cross-shelf trough and bank morphology is absent, which indicates that ice streams probably did not exist on the shelf during Package-3 time. On the continental shelf, only the middle part of Package 3 is …