This dune is part of a ridge behind Delicate Arch. The arch is off to the left of this scene.
My position is shown from near Delicate Arch in another photo: http://www.pbase.com/image/62787630 .
In the other photo, I am atop the undulating rock about one-third of the way from the left side.
The position is also shown at the center of this WikiMapia aerial photo:
http://www.wikimapia.org/#y=38746042&x=-109498211&z=17&l=0&m=a&v=2 .
Joe Tripod, my personal photographic aide, enjoyed standing on a petrified sand dune as much as I did.
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