Environment Changes of Sand Fields in Inner Mongolia,China since the Holocene Recorded by Sandy Paleosol

Paleosol originates from the natural soil buried during the geological period.It is an important information carrier of paleoenvironment.Based on the gathering and combing of documents about paleosol of the sand fields in Inner Mongolia,China,this paper analyzed environmental changes during the desert-formation period and the Holocene in Inner Mongolia through the analysis of paleosol dating data,and in comparison with research results of other information carriers in the region.The environmental changes in the Holocene can be divided into three phases:early Holocene(10-8.5 ka BP)is the heating-up phase,with cold and dry climate;mid Holocene(8.5-2.5 ka BP)is a phase when the climate is very pleasant and the paleosol is commonly developed,but there are fluctuations of short-term dry and cold climate;late Holocene(2.5 ka BP and above)is cooling-down and paleosol-forming phase when the climate gradually turn dry and cool.