reillymj writes: Despite hundreds of media reports to the contrary, a geologist whose life's work has been studying Guatemalan geology has plainly said that the dramatic "sinkhole" in Guatemala City that opened over the weekend isn't a sinkhole at all. Instead, he called it a "piping feature" and warned that because the country's capital city sits on a pile of loose volcanic ash, the over one million people living on top of the ash are in danger of having it happen again in the future.
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