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DITRstocks

01/23/13 9:03 AM

#15237 RE: DITRstocks #15234

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USGT METAMORPHIC AND INTRUSIVE ROCKS

Metamorphosed sedimentary rocks are correlated on the basis of lithologic sequence with unmetamorphosed Neoproterozoic to Devonian strata of the Cordilleran miogeocline in nearby mountain ranges