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1·The erosional surface dissected by such valleys may subsequently become an unconformity in the stratigraphic sequence.

被这种河谷切割的侵蚀面后来可能成为地层层序中的不整合性。

2·The erosional surface dissected by such valleys may subsequently become an unconformity in the strati graphic sequence.

被这种河谷切割的侵蚀面后来可能成为地层层序中的不整合性。