Citation

Geologic map of the Valle 30ʹ x 60ʹ quadrangle, Coconino County, northern Arizona [cartographic material] / by George H. Billingsley, Tracey J. Felger, and Susan S. Priest ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the National Park Service.. [GeoTIFF]. U.S. Geological Survey. Retrieved from https://earthworks.stanford.edu/catalog/mit-001994559