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Physical Sciences and Mathematics
University of Nebraska - Lincoln
Department of Earth and Atmospheric Sciences: Faculty Publications
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Constraining The Amplitude Of Late Oligocene Bathymetric Changes In Western Ross Sea During Orbitally-Induced Oscillations In The East Antarctic Ice Sheet: (1) Implications For Glacimarine Sequence Stratigraphic Models, Gavin B. Dunbar, T. R. Naish, Peter J. Barrett, Christopher R. Fielding, R. D. Powell
Constraining The Amplitude Of Late Oligocene Bathymetric Changes In Western Ross Sea During Orbitally-Induced Oscillations In The East Antarctic Ice Sheet: (1) Implications For Glacimarine Sequence Stratigraphic Models, Gavin B. Dunbar, T. R. Naish, Peter J. Barrett, Christopher R. Fielding, R. D. Powell
Department of Earth and Atmospheric Sciences: Faculty Publications
Abstract Late Oligocene shallow glacimarine sequences recovered from western Ross Sea, Antarctica by the Cape Roberts (drilling) Project display orbitally-influenced cycles of advance and retreat of a laterally-extensive ice sheet across the continental shelf, in concert with changes in contemporary water-depth. During interglacial periods, when the glacier terminated on land, the coastline was largely ice-free and wave-influenced, and sediments accumulated in hydrodynamic equilibrium with the contemporary wave-climate. Here, we present estimates of paleobathymetry from intervals of three Milankovitch-duration glacimarine sequences (9, 10 and 11) that accumulated in open ocean conditions. We utilize an approach where the percentage of mud ( …