description Rock Elm Overview
Rock Elm is a meteorite impact structure near Rock Elm in Wisconsin, United States. The impact produced a roughly circular depression about 6.5 kilometers across and occurred during the Ordovician period. The site is recognized through geological evidence of shock and deformation in the underlying rocks. Rock Elm is studied as part of the record of Paleozoic impacts in North America and illustrates how ancient craters can be modified by erosion.
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