The North American Plate is primarily a convergent and transform boundary. This type of boundary occurs where two tectonic plates collide or slide past each other. In the case of the North American Plate, it borders the Pacific Plate along the coast of California, which creates a transform boundary known as the San Andreas Fault. This is where the plates grind against each other, leading to seismic activity.
Additionally, to the east, the North American Plate interacts with the Eurasian Plate at the Mid-Atlantic Ridge, which is a divergent boundary. Here, the plates move apart, and new crust is formed as magma rises from the mantle. This dual nature of the North American Plate, with both transform and divergent boundaries, showcases the complex dynamics of tectonic plate interactions in this region.