Tessellated Pavement is so called because the rocks here have fractured into polygonal blocks that appears tessellated or tiled.
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At Eaglehawk Neck two types of formations are seen: a pan formation and a loaf formation.
These parts of the pavement do not dry out so much, reducing the level of salt crystallisation.
Also see:Curious Rock Formation of Giant’s Causeway in Ireland
Sources:SMH,Wikipedia