Hoodoos up Deadman Gulch

Walking up the geologic layers to eroded hoodoos above Deadman Gulch. If you learn one thing about iron, its valence... or would you rather be a donkey? Give me a minute.

Free geologic map of the Hoover Dam quadrangle:
https://pubs.nbmg.unr.edu/Geologic-map-of-the-Hoover-Dam-p/m102.htm

Tip Paint Pots pluton of Mills (1994) (middle Miocene)—Modified from Beard and others (2007). White with bright red and yellow hues, medium-grained to hypabyssal monzonite with highly altered plagioclase phenocrysts. Hematitically altered, fractured, and sheared. Some fractures cutting hematitically altered rocks are filled with gypsum. Exposed west of Fortification Hill and informally called Paint Pots because of brightly colored appearance due to hematitic alteration. Age unknown, but locally intrudes 13.9 Ma Tuff of Hoover Dam (Thd; Mills, 1994). Contains roof pendants of Cambrian limestone and shale just (Pz) west of Fortification Hill. Metcalf and others (1993) suggest that Paint Pots may be subjacent plutonic source for Tuff of Hoover Dam that intruded its own volcanic cover