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1978年发现大荔人头骨化石以来 ,都认为该化石是产自中更新世晚期的地层中 ,一些学者一直认为其年龄是 180～ 2 0 0 ka B.P.,也有个别研究者认为是 2 30 ka、大于 2 5 0 ka、30 8ka B.P.的。实际上 ,不仅对化石的年龄有不同数据 ,对化石产地地层也有不同的划分与对比。经再研究 ,该区晚新生代地层从上上新统直到全新统都有发育。沉积类型有湖相 ,河流相和风成黄土—古土壤沉积。人类化石层应是上中更新统的下部或下中更新统的上部 ,或更靠下。
Since the discovery of the human skull fossils in Dali in 1978, all the fossils have been considered as being derived from the Late Middle Pleistocene strata. Some scholars have always considered their age as 180-200 ka BP, and some researchers consider it as 30-30 ka. Greater than 250 ka, 30 8 ka BP. In fact, not only have different data on the age of the fossil, fossil origin stratum also have different division and contrast. After further study, the Late Cenozoic strata in the area developed from Upper Pliocene to Holocene. Sedimentary types are lake facies, fluvial facies and aeolian loess-paleosol deposits. The human fossil layer should be the upper part of the Lower Pleistocene or Lower Pleistocene, or lower.