Note that the Pacific Ocean is comprised of several plates; we want to focus on the very large Pacific plate (not the Nazca plate, or Cocos plate, or Philippine plate or other plates.) The Pacific pla...Note that the Pacific Ocean is comprised of several plates; we want to focus on the very large Pacific plate (not the Nazca plate, or Cocos plate, or Philippine plate or other plates.) The Pacific plate is “born” underwater at the East Pacific rise, the spreading ridge west of South America.