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I am a little bit confused on the two concepts in structural geology, i.e., what is the relationship of anticline and four-way closure. My understanding is that anticline belongs to four-way closure. Is that right? I did not find any materials that discusses the relationship of these two concept. In the context of seismic image, are there distinguished features that can single out four-way closure?

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I understand the term "four-way closure" to be a dome (structural). If that is what you mean...

In that case the 2 structures are similar, but domes are rather symmetrical, whiles anticlines are very asymmetrical, to the extend that we only consider them having to limbs. Although technically speaking anticlines have four, just like domes. Those limbs are called periclines. It's all just convention, both four-way closures and anticlines are folded structures that have an "ending" at some point, it's just that four-way closures are more symmetrical.

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