In the 1850s U.S. Army Lieutenant Amiel Whipple passed through the Painted Desert while surveying a route along the 35th Parallel. Impressed by the deposits of petrified wood, Whipple documented the finding, recording the first published account of…

During the Triassic Period, northeastern Arizona’s Colorado Plateau was near the equator on part of the prehistoric supercontinent Pangea. Due to the different climate, there existed massive trees and rivers all over the area. Some trees fell into…