Question

______ uplifted the Colorado Plateau block about 1.5 km, causing the Colorado River to cut the Grand Canyon

-continental collision
-Mantle upwelling
-crustal extension

Answer 1

Continental collision uplifted the Colorado Plateau, causing the Colorado River to cut the Grand Canyon.

Step-by-step explanation:

The correct answer is continental collision. Continental collision is the geological process in which two continental plates collide with each other, causing the uplift of the Earth's crust. In the case of the Colorado Plateau, the uplift of about 1.5 km was primarily the result of the North American Plate colliding with the Farallon Plate. This collision caused the Colorado Plateau to be uplifted, which in turn led to the cutting of the Grand Canyon by the Colorado River.