原生沉积构造

恢复原生沉积构造的原始产状要素，是古水流分析中的一项重要基础工作。

To restore the original occurrence condition of a primary sedimentary structure is a routine work for palaeocurrent analysis .

根据沉积物的性质、结构及原生沉积构造，将三都红盆冲积扇体划分为21种沉积微相类型。

On the basis of the properties , textures and primary structure of deposits , 21 sedimentary microfacies types are distinguished in the alluvial fan of the Sandu red basin .

这是一个复杂的过程，可划分为四个阶段：1.蒸发盐岩层塑性变形和矿物相的转变导致原生沉积构造破坏和部分角砾岩化；

This process is very complicated and can be divided into four sages : 1 . Destruction of primary sedimentary structures and partial brecciation by plastic deformation of evaporites and by phase change of some minerals ;

另一方面，关于微生物形成的原生沉积构造的研究，对于了解地球表层生物变化与沉积变化之间的复杂关系将会发现更多的新问题而得到进一步的思考与研究。

On the other hand , the study on the ( microbial-induced ) primary sedimentary structures should give rise to new questions and perspectives of the ( complex ) relationship between the biological change and the sedimentary change .

在地层序列中古土壤的识别标志主要包括颜色、粒度、生物成因构造（植物生长痕迹）、原生沉积构造退化特征、层次化和边界特征、宏观结构特征、矿物及地球化学特征等。

The features for identifying paleosols mainly include color , granularity , biogenetic structure ( the trace of plant growth ), degradation character of original depositional structure , arrangement , boundary character , macro-structure character , mineral and geochemical characters .