Part of the great southern ice barrier, 450 miles long, 180 feet above sea-level and 1000 feet thick. Polar expedition mid 19th century

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: 180, 19th, 450, 1000, archival, archive, barrier, century, expedition, explorationexplorersarcticpolariceship, feet, great, historical, history, ice, long, mid, miles, part, polar, sea-level, southern, thick.