NBC Newsのインスタグラム(nbcnews) - 3月13日 02時07分
An ice arch joining the #PeritoMoreno glacier and the shore of Argentino Lake collapsed overnight into the water near #ElCalafate, #Argentina. The arch typically takes 2 - 4 years to form, as the #glacier’s ice slowly builds a dam that connects to the shore. Water then pushes through the dam, creating a steadily wider tunnel that eventually becomes a narrow arch, and collapses.
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(? Walter Diaz / @AFP通信)
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