From Earth Science Picture Of The Day; January 6, 2014:
Cross-Bedding In Navajo Sandstone
Photographer: Daniel Gilmore; Summary Authors: Daniel Gilmore; Jim Foster
The photo above shows a large section of cross-bedding in Navajo Sandstone found at Snow Canyon State Park in southwestern Utah. The tilted or inclined layering is related to how the sand sediments were deposited rather than to tectonic processes such as folding or faulting. Here, Aeolian processes played a role in the inclination of the layering — sand dunes migrated down-wind.
Cinder cones, lava tubes, lava flows and sand dunes can also be found within the confines of Snow Canyon State Park. The lava tubes are large enough to walk into and deep enough to need flashlights to explore even in daylight. Photo taken on June 14, 2013 during a geology field camp with the University of Florida.