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Green Island is a small island situated 150 metres north of the largest of the Berthelot Islands group, Grandidier Channel, approximately 3 kilometres off the Graham Coast of the Antarctic Peninsula (Map 1). Green Island is 520 metres from north to south and 500 metres from east to west, rising to a rounded peak at a height of 83 metres. The island rises steeply on all sides, with high precipitous cliffs on the south and east side.