Mountain Building Compression of the earth's crust 80 million to 40 million years ago caused uplift of the Rocky Mountain chain, from what is now Mexico to Canada.
(Mountain Building Compression of the earth's crust; caused; uplift of the Rocky Mountain chain; T:80 million to 40 million years ago)
Mountain Building Compression of the earth's crust
caused
uplift of the Rocky Mountain chain T:80 million to 40 million years ago