ridge and runnel

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A series of asymmetrical ridges running parallel to the coast and separated by shallow troughs (runnels) 100–200 m wide. This topography is developed on the foreshore of mesotidal or macrotidal beaches. The development of these forms is favoured by moderate wave-energy conditions acting on a flat beach with an abundant sediment supply.

Ridge and runnel

Subjects: Ecology and Conservation — Earth Sciences and Geography.

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