This image shows the Bluff Formation capping the cliffs northeast of Bluff, Utah, US. The Bluff Formation is a late Jurassic formation consisting mostly of eolian sandstone. The thin beds below the massive Bluff Sandstone are Summerville Formation and Entrada Formation; the contact between the two is clearest at far left.
<a href="//commons.wikimedia.org/wiki/User:Kent_G._Budge" title="User:Kent G. Budge">Kent G. Budge</a>
<span class="int-own-work" lang="en">Own work</span>