Tourists watch as the 70 meters (220 feets) front wall of the glacier Perito Moreno breaks down Sunday, March 14, 2003 for the first time in 16 years in Lago Argentino, some 3,200 kilometers, (2,000 miles) southwest of Buenos Aires, Argentina.
Credits: AP Photo/Guillermo Gallardo-Telam
A spectacle unseen for 16 years occurred in Patagonia this week: a natural dam of blue ice gave way to crushing lake waters trapped behind it, finally breaking apart.
Watching tourists applauded as a section of the 60-metre high Perito Moreno glacier collapsed and the waters of the dammed southern arm of Lago Argentino surged through it.
Since last October this section – known as Brazo Sur - had been blocked off from the rest of the lake by the glacier’s flowing ice tongue, which extended a solid wall of ice across the narrow water channel.
Henri Laur | ESA
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