Glen Canyon Group exposed north of Black Mesa, Arizona

The Glen Canyon Group (Early Jurassic, about 180-210 Ma) exposed on the north side of US 160, west of Kayenta on the Navajo Reservation.
Conspicuous red, cross-bedded Wingate Sandstone and the conspicuously cross-bedded, eolian, red to buff Navajo Sandstone form prominent cliffs in northern Arizona. These two sandstone units are separated by variably colored siltstone, silty sandstone, and sandstone of the Kayenta and Moenave Formations.