The Kayenta Formation
The Kayenta formation was formed during the late Triassic Period. It is typically recognizable as a ledgy slope between the Wingate and Navajo Sandstones. It was formed as floodplanes, lacustrine, shoreline and even eolian systems that occurred between episodes of large-scale erg development on this part of the continent.
It spans from the South West Arizona into South West Colorado, and stretches through Zions National Park in southwestern Utah.