A sea arch is a natural, arch-shaped feature found in geography that forms when a cave erodes right through a headland.
Understanding Sea Arches
Based on the provided reference, a sea arch is:
- An arch-shaped feature.
- Also simply referred to as an arch.
- Formed in a headland.
As the cave within the headland increases in size due to erosion, the resulting arch becomes more distinct and striking, often resembling a doorway cut through the rock of the headland.
How Sea Arches Form
The formation process described involves the following steps:
- A cave begins to form in a headland.
- Over time, this cave erodes completely through the headland.
- The erosion creates an opening from one side to the other, forming the distinctive arch shape.
This geological feature is a notable example of coastal erosion.
