Pre-Cambrian igneous rocks of the Unkar terrane, Grand Canyon of the Colorado, Arizona

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Pre-Cambrian Igneous Rocks Of The Unkar Terrane, Grand Canyon Of The Colorado, Arizona

Charles Doolittle Walcott, Joseph Paxson Idding

Gov't print. off., 1895

Science; Earth Sciences; Geology; Geology; Geology, Stratigraphic; Igneous rocks; Petrology; Science / Earth Sciences / Geology