Oops, somehow I missed this. Yeah, I don't know anything about the chemical compositions. Lol, that sounds remote enough for me!
Anyways, I was just reading a bit more on the Tetons and came across this, which might answer questions from an earlier conversation.
Per wikipedia:
Unlike most mountain ranges, the east side of the Teton Range lacks significant foothills or lower peaks which might obscure the view. This is due to the presence of the Teton Fault at the base of the east slope as well as the range being too young to have eroded into soft hills.
Yes, it's really isolated! Interesting what wikipedia says. I'll have to take a look at the land mass where the fault line is. I still think it's rather strange that there are no foothills, regardless of what wiki says.