I need some major help. What is the main prevalent rock type in the Rocky Mountains?
It depends on what part of the Rockies. In the Front Ranges it is mostly Limestone/Dolomite and a lot of Sandstone. In the Interior it is Crystalline and Metamorphic/Igneous complex of granite and andesites/rhyolites. The highest peaks are sedimentary in overthrusted assemblages.
The origin of the rock strata is volcanic with a majority consisting of granite.
