The sediments are detrital and largely of greywacke facies.

沉积岩为碎质，大部分属于杂质砂岩。

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

海绿、碳酸碎、海和胶磷矿普遍出现。

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

斜长碎中钠长组分逐渐增多，钙长组分逐渐减少，最终形成纯钠端元的钠长。