flood deposit meaning in Chinese

洪积物
洪水堆积物

The thesis draws the following conclusion : ( 1 ) 11500 - 8500ab . p . , through comprehensive analysis of these proxy climatic substitute indexes reveals : this was a period in which the temperature risen and the precipitation increased , but it was mainly still dry and cold ; the vegetation was prairie or forest prairie ; there were flood deposits in the dust sediments of late stage ; and it was the shifting period from the new stone age to the old stone age
主要得到以下几方面的认识： ( 1 ) 11500 8500ab . p . ,综合多气候代用指标分析的结果表明：本期气候表现为温度升高、降水增大的好转时期，但总体上仍以干冷为主；结合很少发现较粗颗粒木炭屑的情况推断当时的植被是草原或森林草原；研究发现在后期粉尘沉积过程中有洪流沉积。