Ross Sea snapshots from the past – GLEVORS Project indirect and direct records

• Main Authors: Tolotti R., Corradi N., Colizza E., Caffau M., Baradello L., Burca M., Accettella D., Melis R., Morelli D., Sauli C.
• Other Authors: Società Geologica Italiana, Tolotti, R., Corradi, N., Colizza, E., Caffau, M., Baradello, L., Burca, M., Accettella, D., Melis, R., Morelli, D., Sauli, C.
• Format: Conference Object
• Language: English
• Published: Società Geologica Italiana 2021
• Subjects: Antarctica; Ross Sea; continental shelf; post-LGM environment; micropaleontology; Antarctic; Victoria Land; East Antarctic Ice Sheet; Drygalski; Drygalski Basin; Antarc*; Ice Sheet
• Online Access: http://hdl.handle.net/11567/1056603; https://doi.org/10.3301/ABSGI.2021.03

Geophysical/geological data integration contribute to constrain the reconstruction of the deglaciation patterns imprinted on the seafloor (Anderson et al., 2018; Bart et al., 2020; Prothro et al., 2020). The Northern Drygalski Basin (Ross Sea western coast) shows a subglacial landscape tectonically and ice drainage controlled. Seismo-stratigraphic architectures, related to the fluctuations of the East Antarctic Ice Sheet, allow to interpret the glacial-deglacial sediment depocenters and the Grounding Zone Wedges in this area. Sedimentological, micropaleontological and geochemical analysis on two GLEVORS (Glacial Evolution in the north-western Ross Sea, offshore North Victoria Land – Antarctica) Project Cores GC01 and GC02, result basic for a reliable geomorphic reconstruction in a context where ice landforms and bedforms were shaped and where grounding lines and melt-water processes took place. The sediment cores, considered as important timesnapshotscan provide a chronostratigraphic control on the past marine-based ice-sheet vulnerability and retreat and on the records of the ice streams draining catchments, the post-LGM biological, cryosphere/atmosphere and oceanographic processes (Kim et al., 2018; Post et al., 2020; Smith et al. 2020).