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本文根据典型碳酸盐岩风化壳─—石灰岩、白云岩风化剖面岩土体结构、构造现象的野外系统的观察资料，自基岩到土层系统地采集了风化剖面的代表样品，在室内进行了样品的偏光显微镜、扫描电镜（ＳＥＭ）和Ｘ射线能谱分析（ＥＤＡＸ）测试等工作，对残积红粘土结构、构造特征进行了较系统的研究和成因论证，最后提出了它们是溶蚀─—交代成因的结论，从而进一步充实和论证了作者在以往论文（１９８８，１９８９，１９９１ａ，１９９１ｂ）中提出的论点￣［１，２］．
Based on the observation data of the field system of the typical carbonate weathering crust-limestone and dolomite weathering structures, the authors systematically collected the representative samples of the weathering profiles from the bedrock to the soil layer and conducted indoor tests The samples were analyzed by polarization microscope, scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDAX). The structure and structure of residual red clay were systematically studied and proved. Finally, To explain the cause of the conclusion, thereby further substantiating and arguing the author in previous papers (1988,1989,1991a, 1991b) put forward the argument [1,2].