I’m surprised that climate change isn’t involved in this new discovery.
It’s not like the NPS needs to worry about people destroying these fossil layers, as they’ve been doing their very best to functionally shutdown any support for visitors below the rim.
The personnel of the NPS are largely environmentalists that don’t want any people anywhere in ‘their’ parks.
I know some of them. That is their attitude. It’s THEIR PARK, not yours. You are an intruder. If it was up to them they would lock the gates and not allow anybody in at all................