野外调查和室内实验资料表明 ,西安临潼全新世发育了 4层土壤。其中有两层发育在较温湿的气候条件下 ,两层发育在较冷干的气候条件下。温湿条件下发育的土壤为棕色土与淋溶褐土 ,冷干条件下发育的土壤为典型褐土与粘化黑垆土。临潼与长安全新世土壤结构及粒度成分指示 ,自全新世中期的大暖期以来 ,西安地区气候环境呈明显的变干趋势。 Field investigation and laboratory data show that Lintong, Xi’an developed four layers of soil. Two of these were developed in warmer and wetter climates and two in developing colder climates. The soils developed under warm and humid conditions were brown soil and leached cinnamon soil, and the soils developed under cold and dry conditions were typical cinnamon soil and viscous black loam soil. The soil structure and grain size composition of Lintong and Chang-xian Pliocene indicate that the climatic and environmental conditions of Xi’an have been obviously dried up since the mid-Holocene warm-period.