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

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. 1008H4

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. 1008V3