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最近在内蒙古宁城道虎沟村新发现了一些翼龙、蝾螈等重要化石,有关道虎沟化石层的地层层序和时代归属产生了较大的争论。笔者根据野外调查结果和生物地层学资料,讨论了道虎沟化石层的地层层序和时代归属。详尽的区域地层踏勘和实测地层剖面充分显示,道虎沟化石层归属于中侏罗世九龙山组,而不是所谓的义县组;道虎沟化石层与下伏太古宙马鞍山片麻岩而不是土城子组呈角度不整合接触。
Recently, some important fossils such as pterosaurs and salamanders were newly discovered in Daohugou Village, Ningcheng City, Inner Mongolia. The stratigraphic sequence and the attribution of the era of the Dukhugou fossil formation have generated much controversy. According to the field survey results and biostratigraphic data, the author discussed the stratigraphic sequence and age of Taohuagou fossil layer. The detailed regional stratigraphic reconnaissance and measured stratigraphic profiles fully show that the Donghugou fossil layer belongs to the Middle Jurassic Jiulongshan Formation rather than the so-called Yixian Formation; the Daohugou fossil layer and the underlying Archean Ma’anshan gneiss are Tucheng sub-group is not the point of unconformity contact.