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在山西东南部的榆社、武乡一带的丘陵顶部及缓坡上,广泛分布着一层褐红—深红色粉砂质土状堆积物。三十年代德日进、杨钟健称之为“Red Loam”,简称“R”,并将其上覆的红色土称之为“r”层。关于“R”红土的成因和时代,长期以来一直没有确切的结论,作者多次在该区进行新生代地质考察,对“R”红土的问题作了初步研究,现将一些不成熟的看法提出讨论,以供参考。
In Yushe southeastern Shanxi Province, Wuxiang area at the top of the hills and gentle slopes, widely distributed with a layer of maroon - dark red silty soil deposits. In the thirties, Germany, Japan and Japan, Yang Zhongjian called it “Red Loam”, or “R” for short, and referred to the overlying red soil as the “r” layer. For a long time, there are no definite conclusions about the origin and era of the “R” laterites. The author conducted many geological examinations of the Cenozoic in this area and made a preliminary study on the problem of “R” laterites. Now, some immature opinions are put forward Discuss, for reference.