The profile of JXG2 is about 120 cm thick (Fig. 2), containing a large amount of microliths, animal bone fragments, charcoals and ceramics. The stratigraphic subdivisions and pedological horizons were observed during our fieldwork by close examination of the colour, texture and structure in the profile. It could be divided into four strata. (1) 0e30 cm e a pale yellow modern soil layer, consists of the modern soil of silts, loose, containing a large amount of roots and sands, and a small amount of microliths. (2) 30e75 cm e a dark grey-brown silty loam, relatively tight, containing a large amount of microliths, pottery fragments, bones. Pottery fragments could be found only in this layer. (3) 75e114 cm e a light to medium greybrown
silty clay, hard and tight, rich in microliths, bone fragments.(4) Below 114 cm e loess layer, loose and homogeneous, containing a very small amount of microliths, bone fragments which were brought in by human. This loes layer s is a compact, light to medium grey-brown silty loam.