Jack Dykinga / Eroded striated sandstone (petrified sand dunes), Vermilion Cliffs National Monumant, Colorado Plateau, Arizona, USA

Jack Dykinga / Clouds reflected in pool of rain water in petrified sand dune formation, Paria Canyon-Vermilion Cliffs Wilderness, Colorado Palteasu, Arizona, USA

Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA

Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA

Jack Dykinga / Pinyon Pines (Pinus edulis) amongst petrified sand dunes on the Colorado Plataeu, Arizona

Jack Dykinga / Petrified sand dunes with eroded cross hatch sandstone strata at dawn, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA with first winter snow and Juniper bushes {Juniperus osteosperma}

Jack Dykinga / Petrified sand dunes with eroded sandstone striations at sunset, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA

Jack Dykinga / Petrified sand dunes with eroded red and yellow sandstone bands, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA, and Pointleaf manzanita {Arctostaphylos pungens}

Jack Dykinga / Petrified sand dunes with eroded sandstone at sunset, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking on colorful sandstone strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah