Here's how they form:
1. Wave action: Waves constantly crash against the coastline, eroding the softer rock.
2. Sea cave formation: Over time, waves carve out caves in the cliffs.
3. Arch formation: As the caves erode further, they can eventually connect, forming a natural arch.
4. Stack formation: The arch eventually collapses due to continued erosion, leaving behind an isolated rock pillar, the sea stack.
Sea stacks are a common sight along rocky coastlines and are a testament to the powerful forces of nature.
