坡段组主要由砂砾屑-生屑颗粒岩组成，约占全剖面的2 / 3。它们形成于水流激荡的滩相环境。
The rocks of the Poduan Formation are mainly intraclastic bioclastic grainstones formed in turbulent and agitated bank environments, and amount to about 2/3 of total thickness of the profile.
研究了川中丘陵区紫色水稻土土壤腐殖质碳的剖面分布及其组成特征，探讨了土壤腐殖质与活性有机碳、土壤全氮含量的关系。
The paper studied the distribution of humus carbon in soils sections and the characteristics of humus carbon fraction of purple paddy in Mid-Sichuan Hilly Region.
不同立地土壤无机硫、吸附硫含量在剖面中的分布规律与土壤全硫类似。
Compared with the total sulfur, there are the same distribution orders in profile at inorganic sulfur and adsorbed sulfur.
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