Outcrops of the Javelina Formation, Big Bend National Park, Texas, USA. Photograph by Nick Longrich
<a href="//commons.wikimedia.org/wiki/User:NickLongrich" title="User:NickLongrich">NickLongrich</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>