The brilliant colors in the petrified wood come mainly from quartz, manganese and iron. Most of the fossilized logs are from a tree called Araucarioxylon arizonicum, while two others, Woodworthia and Schilderia, occur in small quantities in the Northern part of the park. All 3 species are now extinct.
Photo by Mike Jones
unused, from 2011
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Union Oil Company's
Natural Color Scenes of the West
Petrified Forest in northeastern Arizona has the largest and most colorful known concentration of petrified wood in the world. Through a process of complete substitution, logs of wood have become brightly colored mineral logs. The forest is reached off U.S. Highway 66 or 260.
Tour the West this year with 76 Gasoline