Coastal Landforms and Erosion
How do waves erode the coast?
Hydraulic Action - Waves hitting the rock, forces pockets of air into the cracks, this trapped air is then released quickly, breaking up the rock.
Abrasion - Waves pick up stones, and hurl them against the cliff, which wears away the rock.
Attrition - Pebbles carried by the waves become rounder and smaller as they collide against each other.
Hard rock coastal landforms created by erosion:
CASS - Caves, Arches, Stacks & Stumps
Caves - formed when the waves erode a weakness in a rock such as a fault or joint
Arch - fomed when two caves erode wither side of a headland and meet in the middle.
Stacks - formed when an arch collapses
Stump - fomed when a stack is affected by wind and water