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Sea Arches

Bedrock and Formation
These sea arches are composed of limestone. The arch formation is most likely the result of small fractures or jointing in the rock that allowed more water into a certain location. This resulted in more erosion in the fractured or jointed areas by wave action, leading to undercutting and the eventual collapse of the rock on the inland side of the arch.

Another picture of the arches (notice the "danger: falling rocks" sign)

Collapse
Eventually, the ocean will erode the supports enough so that they can no longer hold the weight of the arch. When this happens, the arch collapses. (see photo of collapsed arch to the right).

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