The Moenkopi Formation

A slab of the middle Triassic Moenkopi Formation containing a reptile trackway. Part of a walkway at a trading post in Cameron, Az.

Mudcracks in the middle Triassic Moenkopi Formation in Wupatki National Monument.

Mudcracks in the middle Triassic Moenkopi Formation in Wupatki National Monument.

A track of the ichnogenus Chirotherium, showing skin impressions, from the middle Triassic Moenkopi Formation in Wupatki National Monument.

Fine scale bedding within the middle Triassic Moenkopi Formation, near Holbrook, Arizona.

An exposure of the middle Triassic Moenkopi Formation near Holbrook, Arizona.

Eroded cross section of a poposaur tooth in a coarse-grained section of the middle Triassic Moenkopi Formation, near Holbrook, Arizona.