by Andrew C. Revkin
New York Times
This is a brief followup look at holes, building out of coverage here of the extraordinary orifice that swallowed a building and street corner in Guatemala City after the region was struck by a raging tropical downpour. (Interestingly, an American geologist living in that city has concluded that this hole, and another that formed there in 2007, are not technically sinkholes at all, but the result of stormwater drainage eroding the loosely packed pumice, laid down in past volcanic activity, that underlies the region.)
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