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出典:Wikipedia
出典:『Wikipedia』 (2011/05/24 15:54 UTC 版)
Grey dunes are fixed, stable sand dunes located 50–100 m from the edge of the ocean. Grey dunes occur on the landward side of bare white dunes. They are so named due to the presence of grasses and lichens such as the Cladonia species. This creates the characteristic grey colour.
Grey dune