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mapadofu t1_iuzd6h6 wrote

In Dune I read that one side of a dune is soft, the other much firmer. This seems consistent with that.

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Vineyard_ t1_iuzjch9 wrote

Makes sense, because one side of the dune is sand that was recently dropped there by wind, while the other side is sand that once had sand dropped on it by wind and has been compressed by that sand's weight.

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