What feature marks the shoreward limit of marine erosion on a rocky coast?

The shoreward limit of marine erosion on a rocky coast is typically marked by a distinct line or bench known as the "wave-cut platform." This feature is created by the constant pounding of waves against the coast, which gradually wears away the rock and creates a flat surface at the water's edge. In some cases, the wave-cut platform may be several meters wide and extend hundreds of meters along the coast, indicating the strong erosive power of the ocean.