I would think that Wyoming might be included as well, as the grand Tetons cross state lines and I would think such a catacylsmic event(s) would have sloshed well over into Wyoming territory.
Maybe it's a partisan thing. Dick Cheney is from Wyoming. Ya think? ;-)
I love the Grand Tetons, by the way. Breathtaking.
Looks to be a good website for information on all 4 states in the NPS spomdored study.