Man, I've been looking at this one on and off for a while today, there's enough there but it's still so tough!
I'm going to throw this out there since no one else is guessing, p1 of Travels with Charlie? I can't remember what's left of Ribs and Right of Arch but I know the rock looks similar.
It aint Travels with Charlie... but yeah... left of Ribs and Right of Arch? Maybe...that rock does look like it