A loess-paleosol dating method |
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| Authors: | Zhaoyu Zhu |
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| Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, POB 1131, Guangzhou, China |
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| Abstract: | Based on the non-diachronic nature of loess- paleosol sequences, a paleosol dating method is suggested. Based on this method, the extant drainage system of the Yellow River was found to be 1.67-1.45 Ma old. During its existence, six fluvial terraces and two alluvial plains were formed. In the deposits of this time interval, studied in 400 sections, 33 cycles were identified in the sequence built of aquatic sediments and paleosol. Correlation of loess, paleosol, and aquatic sediment sequences of China and other regions points to a 0.4 Ma periodicity in the hydrologic regime and in the denudational processes. This periodicity might be related to global climatic changes due to changes of orbital parameters of the Earth. |
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