“I’ve always been told that given enough time the Rocky Mountains will eventually look like the ones here in the Eastern US.”
You mean the hills in the Eastern US, mistakenly called “mountains.”
http://en.wikipedia.org/wiki/List_of_U.S._states_by_elevation
“By the time humans first walked their slopes, the Appalachian mountains had worn down from prehistoric peaks over 16,000 ft (5,000 m) high to 6,500 ft (2,000 m) today. “
460 million years of erosion kinda does that to you.
I know that after three score & two, I ain’t of the same stature that I was at, say, 21...
The Appalachians are the oldest mountains in the world!
Show some respect for your elders, you young whippersnapper!