The occurrence and texture and structure of sandy dolarenite show that the beach sands was transported into to the sea in the process of transgression, and mixed with dolomitic interclastics.

• 其产状及结构构造特征表明，它是当时的海滩砂在海进过程中被搬运到海洋中，并与白云石砂屑混合而形成的。