Tag: gypsum

Maybe Black Hawk Sinkhole Can Swallow I-90 and Boost Sturgis Tourism

Published 2021-06-21 by Cory Allen Heidelberger

Will the Great Black Hawk Gypsum Sinkhole eat Interstate 90? Anything could happen, suggests Dr. Mohammadhossein Sadeghiamirshahadi of Montana Technical University: An abandoned gypsum mine…

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