Reticulate Morphologies and Environmental Significance of Red Earth Aggradation in Jiujiang
[Objective]Red earth aggradation in the Quaternary has a unique reticulate structure and is widely dis-tributed in the middle and lower reaches of the Yangtze River,and is a record of the response to Quaternary environ-mental changes.[Methods]Prior to this study,most attention has been paid to the physico-chemical properties of the reticulate red earth but less on the morphology of the white veins.A comprehensive analysis of the white veins in combination with their physico-chemical properties is conducive to a deeper understanding of the environmental sig-nificance.This study analyzed these aspects of a reticulate red earth section in Jiujiang,Jiangxi,based on an under-standing of the possible effects and the reticulation mechanism and emphasizing the environmental significance of the morphological properties of the white veins.[Results and Conclusions](1)the shape of the white veins varies sys-tematically in the section,from relatively fine in the upper part and coarsening in the lower part;(2)the extent of correspondence between the weathering index and the morphological index of the white veins shows that,on the whole,their shape corresponds to a climate change trend from warm and humid to cold and dry,but the indication has certain limitations.
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