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Tourists have captured rare footage of the moment a small iceberg from the Upsala Glacier, in Argentina, flips over.
As the watching crowd chatters excitedly, the bottom half of the iceberg emerges slowly from the ocean, sending a torrent of water rushing down its side.
The footage was posted on YouTube earlier this week, and has already been viewed more than 25,000 times.
Originally posted by PluPerfect
.....they are mostly "pure" water ice, little salt.....as in ocean salt.
Of course, there will be certain impurities, this is inherent. But, as a percentage, those will be minor.