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[[file:Grand_Staircase_6.jpg|thumb|500px|[http://written-in-stone-seen-through-my-lens.blogspot.com/2013_04_01_archive.html The Permian Red Beds of Dead Horse Point, Canyonlands, Utah]. Courtesy of Dr. Jack Share.]]
[[file:Grand_Staircase_6.jpg|thumb|500px|[http://written-in-stone-seen-through-my-lens.blogspot.com/2013_04_01_archive.html The Permian Red Beds of Dead Horse Point, Canyonlands, Utah]. Courtesy of Dr. Jack Share.]]
[[File:Permian sponge reef.jpg|thumbnail|500px|Permian reef in west Texas.]]
[[File:Permian sponge reef.jpg|thumbnail|500px|Permian sponge reef in west Texas.]]
==Useful links==
==Useful links==