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.
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。
Neotectonic movement is active, since the epipleistocene active fault zone has had 24 to be many, the predominant direction of fault zone by NW and NWW to primarily.
新构造运动活跃，晚更新世以来的活动断裂带就有24条之多，断裂带展布的上风方向以NW及NWW向为主。
Neotectonic movement is active, since the epipleistocene active fault zone has had 24 to be many, the predominant direction of fault zone by NW and NWW to primarily.
新构造运动活跃，晚更新世以来的活动断裂带就有24条之多，断裂带展布的上风方向以NW及NWW向为主。
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