North American Plate
This plate includes North America and the western part of the North Atlantic Ocean. Its eastern boundary is the Mid-Atlantic Ridges, and the East Pacific Rise lies to the west. This plate has migrated west due to the expansion of the Mid-Atlantic Ridges, which has caused it to collide with the Pacific Plate along the San Andreas transform fault. The North American Plate began to separate from the Eurasian Plate approximately 100 million years ago.