cim3(英語:Graben)在地質學上是一沉陷的地塊、兩旁有平行斷層接壤。 地殼產生斷裂變位時,地層沿着斷層線斷裂後,相對向下陷落的部分,成為地塹。

地塹的橫切面圖

參見

參考文獻

  • McKnight, Tom L; Hess, Darrel. The Internal Processes: Graben. Physical Geography: A Landscape Appreciation. Upper Saddle River, NJ: Prentice Hall. 2000: 417. ISBN 0-13-020263-0.

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