The sediments are detrital and largely of greywacke facies.

沉碎质，大部属于杂质砂相。

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

海绿石、碳酸盐骨骸碎、海相化石和胶磷矿普遍出现。

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

斜长石碎中钠长石组增多，钙长石组减少，最终形成纯钠端元的钠长石。