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Studies Find Fungi Caused Massive Sand Dune Collapse

Researchers say holes that forced the closure of a massive sand dune at an Indiana Dunes National Lakeshore were caused by sand-covered trees that left cavities behind as they decayed over the years.

A dune collapsed in 2013 burying a six-year-old boy. He was rescued after being trapped for several hours.

A study published in December and a second due out this summer conclude that fungi on the covered trees formed a sort of cement that allowed the sand to keep its hollowed out shape as the wood decayed and collapsed inward.

Bruce Rowe, a spokesman for the park, says the studies will determine whether the popular dune, Mount Baldy, can be reopened. Researchers say the phenomenon is likely responsible for holes found in migrating dunes in Oregon and Michigan.

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