保存得很好的 1.8-km-diameter Xiuyan 坑位于北中国的 Liaodong 半岛的北部分的低山脉山区域。最近,在坑的中心的 307-m-deep 地上凿穿变得可得到。在渗透 107 m 以后湖的沉积,一个角砾岩透镜在厚度的大约 188 m 被遇到。坑充满角砾岩是岩石 clasts 和碎片的存款差不多变形吃惊。在在在地下室岩石中发现的石英的坑,融化吃惊的岩石,和 PDF 以内的地质的结构和 stratigraphic 配置的特征关门到坑边界并且为 Xiuyan 坑的影响起源在坑充满角砾岩提供清楚的证据。
The well-preserved 1.8-km-diameter Xiuyan crater is located in the low mountain-hill region of the northern part of Liaodong Peninsula of northern China. Recently, a 307-m-deep borehole at the centre of crater became available. After penetrating 107 m lacustrine sediments, a breccia lens about 188 m in thickness was encountered. The crater-fill breccia is deposits of rock clasts and fragments more or less shock-metamorphosed. The features of geological structure and stratigraphic configuration within the crater, shock-melted rocks, and PDFs in quartz found in the basement rocks close to the crater rim and in the crater-fill breccia provide clear evidence for an impact origin of the Xiuyan crater.