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Sea Arch

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Stacks are formed when part of a cliff is eroded, leaving a small island. They also form when a sea arch collapses. Stacks typically form in horizontal sedimentary rocks particularly on limestone cliffs. Cliffs with weaker rock such as clay erode too quickly to form stacks, while harder rocks such as granite erode in different ways.

Added:
29th May 2008

Subjects:
Geography, Science

Key Stages:
Foundation, Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4, Key Stage 4+

Keywords:
Sea Arch; Sea Stack; Cliff; Erosion; Limestone

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