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We present multibeam swath bathymetric surveys of the major fjords surrounding the sub-Antarctic island of South Georgia to characterise the glacial geomorphology and to identify the relative timings and extent of past glacial advance and retreat.

The sys- tem uses an ultraviolet germicidal irradiation lamp worn in a backpack that draws in potentially infected air, treats it, and directs it through a tube toward the worker’s mouth.

The cross shelf troughs, and mid-trough moraines are interpreted as the product of much more extensive glaciations that predate the fjord geomorphology mapped here, thus possibly older than MIS6.

This hypothesis would suggest that South Georgia followed a glacial history similar to that of central Patagonia (46°S) where a series of Pleistocene glaciations (of MIS 20 and younger) extended beyond LGM limits, with the most extensive glacial advance occurring at This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivative Works License, which permits non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

It’s an LED light that says ‘yes’ or ‘no.’ We learned that high tech doesn’t necessarily mean better.

Sometimes, a simpler design is actually the best.” The project required optical equipment, which had to be ordered from the United States.


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