Figure 3: Detailed multibeam swath bathymetry maps showing glacially-formed landforms. | Nature Communications

Figure 3: Detailed multibeam swath bathymetry maps showing glacially-formed landforms.

From: Major advance of South Georgia glaciers during the Antarctic Cold Reversal following extensive sub-Antarctic glaciation

Figure 3

(a) Compiled swath bathymetry tracks west of the island illustrating a large outer ridge and back-stepping recessional moraines; profile v–x through the ridge shown in ‘c’; (b) a sub-set of the recessional moraines in detail. (c) profile v–x through the outer ridge showing the separation of deeper, pitted sea-floor and moraine-mantled topography inshore. (d) streamlined subglacial bedforms south of the island, resembling drumlins formed by warm-based, fast glacial flow. (e) topographic profile y–z across the bedforms illustrating their range of amplitudes and typical wavelengths. Profile located in ‘d’. Data in ‘a’ gridded at 5 m grid cell size, and at 8 m grid-cell size in ‘d’.

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