It's important to note that the canyon itself wasn't formed by the movement of tectonic plates. The Colorado River carved the Grand Canyon over millions of years through a process of erosion. However, the uplift of the Colorado Plateau, on which the Grand Canyon sits, was influenced by tectonic activity.
The North American Plate is a massive tectonic plate that encompasses most of North America, Greenland, and parts of Iceland and northwestern Europe. It has been responsible for the formation of many geological features in the area, including the Rocky Mountains and the Colorado Plateau.