The distribution of sands in the trough zone of the depression is studied by using seismic stratigraphic interpretation method.
歧口凹陷凹槽区利用地震地层学解释技术研究砂体分布。
It is the Guishan Formation of! the former Xinyang Group that is the strongly deformed pre-Devonian tectono-stratigraphic unit distributed in the main suture zone.
原信阳群龟山组就是沿主缝合带分布的前泥盆纪强应变构造地层体。
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