Wave cut platform

• Weaknesses such as joints in cliffs are undercut by erosion to form a wave-cut notch.
• The rock above overhangs over the notch and, as erosion continues, the notch enlarges until the unsupported overhang collapses due to the weight.
• The new cliff face is then eroded and, through time, the cliff retreats inland, leaving a gently-sloping rocky surface called a wave-cut platform, which extends out to sea away from the cliff.
• The platform is abraded by rock materials, with rock pools and potholes, evident at low tide.
• Seven sisters is a wave cut platform