Toplap is evidence of a non de-positional hiatus.

顶部超覆是无沉积作用间断的证据。

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On the seismic section it appears as erosion, toplap, onlap, downlap;

在地震剖面上表现为剥蚀、顶超、上超、下超；

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On the seismic section it appears as erosion, toplap, onlap, downlap;

在地震剖面上表现为剥蚀、顶超、上超、下超；

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