自北京猿人(Homo erectus pekinensis)首次发现于周口店洞穴堆积以来,至今已有半个多世纪,由于它在学术上具有重要意义,50年来,中外学者对猿人时期的沉积、气候和冰川以及伴生的动物群等诸方面研究较多,而涉及到自然环境的演变,仅有数文发表,但他们因根据不同,所作结论也不一致,而且又只限于第一地点的洞穴堆积。 Since the Homo erectus pekinensis was first discovered in the Zhoukoudian cave accumulation, more than half a century has passed since it was of academic importance. For 50 years, Chinese and foreign scholars have studied the sedimentation of the apes, climate and glaciers, Fauna and other aspects of the study more, but relates to the evolution of the natural environment, only the number of published, but they are based on different conclusions are inconsistent, but only confined to the accumulation of caves in the first place.