Word: flattop
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Dates: during 1980-1989
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...shouted message, a stupendous explosion of trapped gases, generating about 500 times the force of the atomic bomb dropped on Hiroshima, blew the entire top off Mount St. Helens. In a single burst St. Helens was transformed from a postcard-symmetrical cone 9,677 ft. high to an ugly flattop 1,300 ft. lower...