Is the Rockie Mountain range still lifting – or are they dying?

Question by Sciencemom: Is the Rockie Mountain range still lifting – or are they dying?
A geology special last night said that the Rockies were a dying mountain range. But isn’t the Pacific plate still subducting and therefore lifting the North American plate? Or is the erosion rate higher than the uplift rate?

Best answer:

Answer by Strigiformes
Rocky Mountains (at least in Pikes Peak country) were formed by the uplift and erosion of a granite batholith. No longer uplifting because there is no longer volcanic activity, thus they are dead and eroding.

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