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Black Hills / Frostwork / South Dakota / Boxwork / Wind Cave National Park / Cave / Limestone / Abukuma-do / Jewel Cave National Monument / Speleothems / Geology / Physical geography


Geologists believe that the unique formation found in Wind Cave called boxwork, predates the cave. The cave is formed in limestone and geologists believe that
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Document Date: 2012-09-25 19:37:30


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