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Show 1 1 " Constant Shifts of i". - Land and Sea Areas How tlu mountain of the eastern United States seem to have been In the hubtt, millions of year ago, of shutting up and opening out again, periodically, like an accordion a procedure pro-cedure vlilch they may not entirely have given up, was described by Chillies Butts, of the United State geological survey, in a communication to the Washington Academy of Sciences. Sci-ences. ' . Studies of rock formed In different parts of what are now the Appalachian Appalach-ian inoimtiiln several hundred million yeorn ago, during what geologist call the I'aleowile age, have proved, Mr. Uutta reported, that parts of these mountains were alternately under the ocean and exposed to the air. Thesi record, he said, "a constantly and gently oscillating crust or exterior shell of the earth which caused a continual shifting of the areas of land and sea." There Is no sign of sudden chances, lifting new mountains or engulfing former lands. The hand of nature worked so slowly that had men been there to see It the process might have passed unobserved. Baltimore Sun. |