the u.s. rocky mountains came to look the way they do today by being seen from across the prairies.
how did the u.s. rocky mountains come to look the way they do today?
seen from across the prairies
the rocky mountains took shape during an intense period of plate tectonic activity that resulted in much of the rugged landscape of the western north america. the laramide orogeny, about 80–55 million years ago, was the last of the three episodes and was responsible for raising the rocky mountains. subsequent erosion by glaciers has created the current form of the mountains.





















































section::::ancestral rock.
geology of the rocky mountains
list of passes of the rocky mountains





















































the rocky mountains of north america include more than one thousand named mountain passes (topographic saddle points).





















































section::::see also.





















































bullet::::- list of mountain passes





















































bullet::::- rocky mountains





















































bullet::::- canadian rockies





















































bullet::::- central rocky mountains





















































bullet::::- western rocky mountains





















































bullet::::- southern rocky mountains





















































bullet::::- mountain pass





















































bullet::::- list of mountain passes in colorado





















































bullet::::- list of mountain passes in montana





















































bullet::::- list of mountain passes in wyoming





















































bullet::::- list of railroad crossings of the continental divide of north america





















































bullet::::- list of rocky mountain passes on the continental divide of the americas
list of passes of the rocky mountains