A sequence of the coarse-grained terrigenous clastic deposits 100 m and more thick are devel- oped on the Archean to Early Proterozoic crystalline basement in Luanxian in eastern Yanshan re- gion.

• 在燕山地区东部的滦县等地,太古代至早元古代结晶基底之上发育一套百余米厚的陆源粗碎屑沉积。