The Thwaites Iceberg Tongue (74°0′S 108°30′W / 74.000°S 108.500°W / -74.000; -108.500) was a large iceberg tongue which was aground in the Amundsen Sea, about 32 km northeast of Bear Peninsula. The feature was about 112-km long and 32-km wide, and in January 1966 its southern extent was only 5 km north of Thwaites Glacier Tongue. It consisted of icebergs which had broken off from the Thwaites Ice Tongue and ran aground, and should not be confused with the latter, which is still attached to the grounded ice. It was delineated by the USGS from aerial photographs collected during Operation Highjump and Operation Deepfreeze. It was first noted in the 1930s, but finally detached from the ice tongue off and broke up in the late 1980s.
Read more about this topic: Thwaites Glacier
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—John Ashbery (b. 1927)
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