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Elementary Geology. by R. S. TarrThe American Naturalist, Vol. 31, No. 369 (Sep., 1897), p. 804Published by: The University of Chicago Press for The American Society of NaturalistsStable URL: http://www.jstor.org/stable/2452701 .
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This content downloaded from 193.105.154.55 on Wed, 21 May 2014 00:28:56 AMAll use subject to JSTOR Terms and Conditions
This content downloaded from 193.105.154.55 on Wed, 21 May 2014 00:28:56 AMAll use subject to JSTOR Terms and Conditions