The Pacific plate meets the North American plate

In future millennia, the Colorado River will eventually sculpt the plateau into the epic Grand Canyon.30 million years ago, the majority of the Farallon Plate sinks into the mantle,leaving behind only small corners still subducting.The Pacific and North American plates converge and a new boundary called the San Andreas Fault forms.Here, North America moves to the south,sliding against the Pacific Plate,which shifts to the north.