Billingsley, G.H., 1987, Geologic map of the southwestern Moenkopi Plateau and southern Ward Terrace, Coconino County, Arizona [The Landmark, Gold Spring, Wupatki NE, Badger Spring, and Rock Head 7.5 min]: U.S. Geological Survey Miscellaneous Investigations Series Map I-1793, 1 sheet, scale 1:31,680.