alluvial expansive soil
... alluvial brown soil 棕色冲积土 alluvial expansive soil 冲积膨胀土 calcareous alluvial soil 石灰性冲积土 ...
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合肥地区膨胀土形成于第四纪上更新世Q_3及其以前，属江淮冲积、洪积成因类型。
The swelling soil in Hefei zone was formed at the Q3 epipleistocene of the 4th subage or before. It belongs to the type of Huaihe alluviation and diluvion.
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