Since the North American coast shows an extremely complicated geologic structure, intensive work has been required to understand the complexity of this system. In 2013 a new explanation emerged from recent research, proposing two additional now fully subducted plates, accounting for some of the complexity of this coast line.
Due to the intricate geologic formations along the North American coast, researchers have dedicated significant effort to unraveling its complexities.  In 2013, new findings revealed the existence of two additional subducted plates, contributing to a better understanding of the coast's unique features.