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| shifting sand | |||
| drift sand; drifting sand; driftsand; quicksand; running sand | |||
| dune A low mound, ridge, bank, or hill of loose, windblown granular material (generally sand, sometimes volcanic ash), either bare or covered with vegetation, capable of movement from place but always retaining its characteristic shape | |||
| lentohiekka: 1 phrase in 1 subject |
| Environment | 1 |