National Geologic Map Database
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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Additional Resources
- Links and Downloads:
- View the publication from the USGS Publications Warehouse
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.