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本文论述了我国西北高原黄土属于冷于气候下发育的古土壤.其论据主要是土壤结构的特征,土壤生物及碳酸钙存在的形态和分布及风化现象,并与红褐色粘土进行了对比,得出了黄土是冷干气候条件下土壤化的结论.本文又在区别粉尘沉积体和黄土层土壤的前提下,指出黄土的土壤化过程可以反映当时的古气候特征,认为黄土的土壤特征可作为气候指标,来反映气候变化.
This paper discusses that the Loess Plateau in northwestern China belongs to the paleo-clayey soil developed in the cold climate, and its argument is mainly the characteristics of the soil structure, the morphology and distribution of soil organisms and calcium carbonate and the weathering phenomenon, and compared with the red-brown clay It is concluded that the loess is the soil under cold and dry climate conditions.Under the premise of distinguishing dust sediment and loess soil, it is pointed out that the soil process of loess can reflect the paleoclimate characteristics at that time, and the loess soil characteristics can be regarded as Climate indicators to reflect climate change.