Subglacial geomorphology of Lystad Bay, Horseshoe Island, Antarctica

Tuba Çınar Pehlivan, Bedri Alpar

ORCID IDs: T.Ç.P. 0009-0004-1284-948X; B.A. 0000-0002-9694-1395

Turkish Navy, Office of Navigation, Hydrography and Oceanography, Istanbul, TÜRKİYE
Institute of Marine Sciences and Management, Istanbul University, 34134, Istanbul, TÜRKİYE

Abstract

High-resolution swath-bathymetric data were collected via multibeam sonar in Lystad Bay (Horseshoe Island, Antarctica). From 3D high-resolution data, important shallows that pose a danger to sailors have been identified. Successive depressions on the crystalline/volcanic bedrock (active lakes), elongated-streamline glacial landforms and glacial landforms with distinctive shapes in this subglacial margin were recognized, and how they may have developed was explained. Limited oceanographic data support that suspended material transport may also be effective in sediment accumulation. Suggestions have been made for geological and geophysical studies that are expected to be carried out in the future.

Keywords: Hydrography, multibeam, sea floor morphology, drumlins, meltwater corridors

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