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侧积交错层是砂体侧向迁移加积所形成．在辫状河道砂体中特别发育，其特点：①层系的整体形态呈板状，而细层呈“Ｓ”形弯曲，向上，向下收敛明显；②侧积交错层的某些细层内部可见次一级的前积交错层及沿塌构造；③层系厚度与沉积物粒度无关；④同一层系内各细层的厚度、成分和粒度有较大差异；⑤细层倾向垂直干区域古流向。辫状河道中侧积交错层发育原因是：横向环流的普遍存在；沉积物中富砂少泥。
The side-by-side staggered layer is formed by lateral migration and accumulation of sand bodies. In the braided channel sand body particularly developed, its characteristics: ① the overall shape of the plate was plate-like, while the fine was “S” -shaped bend, up and down significantly convergent; ② side of the staggered layer of some fine layer The inner can be seen in the next level before the cross-staggered layer and along the collapse structure; ③ layer thickness and sediment particle size has nothing to do; ④ the same layer within each layer thickness, composition and size are quite different; Regional ancient flow. The reason for the development of the mid-product cross-bedding in the braided channel is that the horizontal circulation is ubiquitous and that the sand in the sediment is less muddy.