中国西北地区，从中新世以来就有持续不断的风尘沉积。
Ever since the Miocene time, aeolian dust has been falling down over Northwestern China, forming the Loess Plateau.
这种风尘沉积作用即使在气候较为湿热的古土壤发育时期也未中断。
The dust sedimentations have never been intermitted even in the soil-forming periods when the climates were warmer and wetter.
T2阶地上覆的最老风尘沉积是黄土l1，对应氧同位素期MIS 2。
The oldest aeolian deposit on terrace T2 is loess L1, corresponding to oxygen isotope time MIS2.
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