The Nankou Group includes Gaoyuhzuang Formation and Yangzhuang Formation. The Gaoyuzhuang Formation is dominated by carbonate and the contact relationship between Dahongyu Formation is parallel unconformity.
南口群包括高于庄组和杨庄组,其中高于庄组是一套碳酸盐岩占绝对优势的地层。
参考来源 - 东燕山地区中元古界南口群层序地层格架研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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