Excerpt from Man and the Glacial PeriodSee especially Chamberlin, in the American Journal of Sci ence, vol. Xlv, p. 192, Salisbury, in the American Geologist, vol. Xi, p. 18.Warren, Pa where, in an area which was affected by only the earliest glaciation, glacial deposits are found filling the rock channels of old tributaries to the Alleghany to a depth of from one hundred and seventy to two hundred and fifty feet, and carrying the preglacial e...
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