Seen from Telegraph Flat, Bloomington Cyn., Bear Lake Co., Idaho view map
I think I understand what is making that striated appearance, but I can't see well enough to tell for sure. I don't know why I didn't get my binoculars out, but I didn't. At any rate, I found it quite mesmerizing.
Panasonic Lumix DMC ZS40 1/250s f/5.1 at 20.6mm iso100
full exif