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Sigma KEE - Sand

KB Term:

沙

Sand 是由松散零碎的 Mineral 或 Rock 组成的 Mixture。(溫特瓦分級)沙粒比卵石小而比 Silt 和 Clay 大，它的 approximateDiameter 在 0.062 Millimeter 到 2 Millimeter 之间。Sand 是石头受水、冰或空气的 %Erosion 所产生的。

Relationships
Parents	泥	Soil is a substance composed of fine rock material disintegrated by geological processes, mixed with humus, the organic remains of decomposed vegetation.