Coastal dunes are a ridge ... four main ways: traction or creep, saltation, reptation and/or suspension (Figure 2). Regardless of the mechanism, as sediment is transported down-wind it produces ...

Saltation – where small pieces of shingle or large sand grains are bounced along the sea bed. Traction – where pebbles and larger material are rolled along the sea bed.

Saltation - where small pieces of shingle or large sand grains are bounced along the sea bed. Traction - where pebbles and larger material are rolled along the sea bed.