[Utah-astronomy] Shadow of Contrail From Whispering Oaks Lodge-Near Moab, Utah

Have any of you seen this effect before. This is a photo of the shadow of a contrail you could see from the porch of Whispering Oaks Lodge near Moab, Utah on the morning of July 27th. The shadow of the contrail was very prominent. I’ve never seen this effect before and thought it was very interesting. The shadow lasted about 20 minutes and became wider and more turbulent-looking as the contrail broke up. http://www.flickr.com/photos/78046474@N06/9396674461/