The sediments are detrital and largely of greywacke facies.

沉积岩为，大部分属于杂砂岩相。

Glauconite, detrital carbonate skeletal debris, marine fossils, and collophane are commonly present.

海绿、碳酸盐骨骸、海相化和胶磷矿普遍出现。

The albite component increases while anorthic component decreases in detrital plagioclase.The plagioclase turned into an end - member component of albite.

斜中钠分逐渐增多，钙分逐渐减少，最终形成纯钠端元的钠。