Paria Canyon-Vermilion Cliffs Wilderness, AZ / Petrified sandstone formation with bold striated patterns and lichen covered stones. 1107VP5

Vermilion Cliffs National Monument, AZ / BLM Erosion sculpted striated sandstone of the petrified sand dunes on Arizona's Colorado plateau. 1008V3

Vermilion Cliffs National Monument, AZ / BLM Erosion sculpted striated sandstone "swirls"of the petrified sand dunes on Arizona's Colorado plateau under clouds at sunset. 1008V1