周口店北京猿人洞穴里的沉积物厚达40余米,根据对沉积物中砂层的粒度分析、重矿物分析、石英颗粒表面形态分析和石英砂化学成分的测定,将猿人洞里的沉积物分为上下两段:下段主要是周口河的河水从猿人洞东洞口灌进洞内沉积而成的;上段沉积物来源于上砾石层和附近的坡积物,它们是由片流作用循竖井和岩溶裂隙进入洞内沉积的。 Zhoukoudian Peking Man cave deposits of up to 40 meters thick, according to the sediment sand particle size analysis, heavy mineral analysis, quartz particle surface morphology and chemical composition of quartz sand determination, the sediment points in the ape cave For the upper and lower sections: the lower part of the river is mainly Zhoukou River hole from the hole in the East hole into the cave deposited; the upper sediments from the upper gravel layer and near the slope sediment, they are by the flow of shaft and shaft Karst cracks into the cave deposition.