I think that it has much to do with acid rain, if any. I didn't get to shoot any of that when I was there. Thanks for sharing Joe.
The most photographed arch (Wall Arch) in Arches National Park has collapsed.
Appears to be caused by time and gravity.
Some walking trails are closed until rubble is removed and the safety of the remainder of the arch is determined.
Anyone have a photo of the arch before its collapse?