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General Information

  • Title: Pre-Cambrian igneous rocks of the Unkar terrane, Grand Canyon of the Colorado, Arizona
  • Author(s): Walcott, C.D.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Annual Report 14 [pt. 2, p. 503-519]
  • Larger Work: Powell, J.W., Fourteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1892-1893; Part II
  • Publication Date: 1894
  • Map Scale: 1:192,647
  • Cross Section: Yes
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.