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长江三角洲陆相硬粘土层含有典型土壤的特征，如粘粒胶膜、土壤新生体、裂隙和孔洞等，应为古土壤层。通过对土壤形成物分析发现，古土壤形成时，长江三角洲地区气候虽较现今寒冷，降雨量也有所减少，类似现今的温带气候，但当时干湿季节（时期）交替明显，地下水位升降频繁，可能是古季风活动的反映。土壤层中成土程度有强弱变化，植物硅酸体指示的气候有冷暖干湿之分，表明沉积和成土作用交替进行，因此成土作用能够改造已形成的土壤发生层，特别是冰期低海面时持续的成土作用进一步改造早期古土壤，致使土壤发生层分异不够明显。
The terrestrial hard clay layer in the Yangtze River Delta contains typical soil characteristics such as clay film, soil newborn, fissures and holes, etc., which should be paleosol layers. Through the analysis of soil formations, paleoclimate formation, the climate in the Yangtze River Delta, although now more cold and less rainfall, similar to today’s temperate climate, but at that time the wet-dry season (period) alternating obvious, frequent groundwater table movements, May be a reflection of the ancient monsoon activity. The degree of soil formation in the soil layer has the strength and weakness. The climate indicated by the silicic acid body of the plant has the points of warm, cold, dry and wet, indicating that the sedimentation and soil-forming activities are alternated. Therefore, the soil-forming effect can transform the formed soil- The continuous soil formation at low sea level further remodeled the early paleosol so that the differentiation of soil layers was not obvious enough.