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根据黄土—古土壤沉积序列研究和野外考察资料并结合放射性14 C测年 ,初步确定嘉陵江上游白龙江流域全新世泥石流共分三期 ,时代分别为 70 0 0 -60 0 0aBP、4 0 0 0aBP和 2 0 0 0aBP .研究表明 ,泥石流频繁爆发于古气候由寒冷向温暖转换的波动时期 .
According to the sequence of the loess-paleosol sedimentary sequence and the field investigation data and combined with the radioactive 14 C dating, the Holocene debris flow in the Bailongjiang valley in the upper reaches of the Jialing River is preliminarily divided into three phases with the ages of 70 0 0 -60 0 0 aBP and 4 0 0 0 aBP, respectively 2 0 0 0 a BP. Studies have shown that debris flow frequently occurs during the period of paleoclimate transition from cold to warm.