The Petrified Forest National Park is located in Arizona just off Interstate 40. It's about 120 miles east of Flagstaff and about 72 miles west of Gallup, New Mexico. Do the 27 mile drive through the park and stop to see petroglyphs and land formations. You can buy petrified wood at the gift shop. This picture of the Painted Desert was taken from the Petrified Forest National Park.
Iron oxides cause the red tones of the desert.
The rocks of the Painted Desert are included in the Chinle Formation.