wave-cut terrace

A wave-cut terrace, also known as a wave-cut platform, is a gently sloping rock ledge found at the base of a sea cliff. It extends from the high-tide level down to below the low-tide level. This feature forms through the process of wave abrasion. As waves erode a notch at the base of the sea cliff, the overhanging rock collapses, causing the cliff to retreat. This process gradually widens the platform.1

Beaches can prevent the formation of wave-cut platforms by protecting the shore from wave abrasion. The rock structure and type significantly influence platform development; solid, resistant rocks like granite may hinder or prevent its formation. If sea levels change, platforms can be submerged or raised. Raised platforms are called marine terraces. A wave-built terrace is a related feature, consisting of loosened material built up at the edge of a wave-cut terrace.12