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对宣城第四纪红土剖面的研究表明，全氧化铁含量能够较好地指示中国南方第四纪气候的波动。与北方黄土古土壤序列相比，宣城剖面的全氧化铁明显较高，指示了南方地区更强的风化成壤作用。
The study on the Quaternary lateritic clay profiles in Xuancheng shows that the whole iron oxide content can better indicate the fluctuation of the Quaternary climate in southern China. Compared with the loess paleosol sequences in northern China, the total iron oxide in the Xuancheng section was significantly higher, indicating stronger weathering and pedogenesis in the southern area.