The crest of a sand hill and a wind

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The crest of a sand hill and a wind
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It is a crest of a sand hill and a wind. If it stands still at Tottori sand dunes in which the person who walks is not present at all early morning, either and the sound of the wind is heard, sand will sometimes flow. Do such winds form the crest of a wind automatically? I feel that very natural beauty can be seen there.