Palaeoenvironmental significance of grain-size distribution of river flood deposits: a study of the archaeological sites of the Apengjiang River Drainage, upper Yangtze region, Chongqing, China

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• 作者：Chuanxiu Luo^a ; ^b ; ^{eezhuo@126.com} ; Zhuo Zheng^b ; Houxi Zou^c ; Anding Pan^d ; Gang Fang^c ; JiuJiang Bai^c ; Jie Li^b ; Mingxi Yang^e
• 关键词：Apengjiang River ; Wujiang River ; Palaeofloods ; Environmental archaeology ; Sedimentology ; Holocene ; China
• 刊名：Journal of Archaeological Science
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：40
• 期：2
• 页码：827-840
• 全文大小：3477 K

文摘

The grain-size distribution (based on cumulative probability curves) in the sediments produced by potential palaeofloods at the Shiniusi archaeological site is similar to that of modern flood sediments from the Wujiang River Drainage in the upper Yangtze River. There is an obvious pattern in the curves, with two segments, and the mean grain size (Mz), standard deviations (¦Ò1), skewness, and kurtosis are all similar. Combined with the AMS¹⁴C dating data and the ages judged based on the presence of cultural remains, our data suggests frequent palaeoflood events within the Wujiang River Drainage. We hypothesize the existence of seven high flood possibility layers in the QST4 unit from Shiniusi archaeological site: during the periods of the Ming Dynasty (1368-1644?AD) to the Qing Dynasty (1616-1911?AD), and the end of the Eastern Zhou Dynasty (770?BC-256?BC) to the Shang Dynasty (1600-1100?BC). We also hypothesize ten high flood probability layers in the QST2 unit from Shiniusi archaeological site: during the periods of the Ming Dynasty to the Qing Dynasty, the periods of Song Dynasty (960-1279?AD) to the Yuan Dynasty (1206-1368?AD), as well as during the Han Dynasty (207?BC-220?AD) to the Eastern Zhou Dynasty (770?BC-256?BC). These results are consistent with palaeoflood events inferred from pollen and spore analysis and from historical records in other rivers.