Sea Cliff
Explanation
Coastal landforms are primarily shaped by the erosional and depositional work of sea waves. On high, rocky coasts, the continuous impact of waves against the base of rocks leads to the formation of distinct vertical features through hydraulic action and abrasion.Analysis of Options:
- Sea Arch Sea Arch: This is formed when waves erode through a narrow headland or when two sea caves on opposite sides of a headland meet. It is a bridge-like structure, distinct from a continuous vertical wall.
- Sea Cliff Sea Cliff: A sea cliff is defined as a steep rocky coast rising almost vertically above sea water. It is formed by the undercutting action of waves at the base of the rock, causing the upper rock face to collapse and retreat landwards.
- Stack: A stack is an isolated pillar of rock standing in the sea. It is formed when the roof of a sea arch collapses due to erosion and gravity, leaving the pillars separated from the mainland.
- Headland: A headland is a point of land, usually high and with a sheer drop, extending out into a body of water. While headlands often contain cliffs, the specific term for the vertical rocky face.
Key Takeaway: A Sea Cliff is the steep vertical face of rock along a coast, whereas arches and stacks are subsequent erosional remnants formed from the erosion of headlands.