“蓝田地区”一词在这本报告里用以指蓝田县及西安市、临潼及渭南县的邻接地带。这个地区的第三系地层,依照中国科学院古脊椎动物与古人类研究所蓝田工作队的划分, 包括六个地层单元。从1960年以来,在蓝田地区的上述六组地层中,找到了相当数量的脊椎动物(主要是哺乳类)化石。这些化石中,有一部分已经研究发表(刘东生、李玉清, The term “Lam Tin Area” is used in this report to refer to the adjoining areas of Lantian County and Xi’an, Lintong and Weinan County. Tertiary strata in this area are divided into six strata based on the division of the Lantian Task Force of the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences. Since 1960, a considerable number of fossils of vertebrates (mainly mammals) have been found in the above six groups of strata in Lam Tin area. Some of these fossils have been published (Liu Dongsheng, Li Yuqing,