Basal conglomerate of the Upper Cretaceous Iron Springs Formation (dark) overlying the light carbonates of the Carmel Formation (Middle Jurassic). Near Gunlock, southwestern Utah.
<a href="//commons.wikimedia.org/wiki/User:Wilson44691" title="User:Wilson44691">Wilson44691</a>
<span class="int-own-work" lang="en">Own work</span>