>>2754243Apparently there is a meteor involved that fell near Cumberland Gap, creating one of the towns there, but I'm not sure if it supposedly helped etch the gap itself.
ok so red is pine mountain, purple is cumberland/big stone mountain
and blue is osborne ridge/little stone mountain I think its also called powell mountain to the SW
its hard to make out the allegheny front but there appears to be dendritic creeks even on the SE slopes of Pine/Cumberland mountains so those can't be the allgheny/cumberland front, whereas you see the classic shape of the plateau boundary progressing into the steepest hollers on the ridge and valley side of the edge of the plateau (glady fork of stony creek being the steepest)
For whatever reason, the plateau has more prominent ridges than the ridge and valley there, which is really unusual, but that's how the terrain seems to be set up, or maybe I'm not understanding the nuance here.