硬石膏

Eodiagenesis is characterized by the assemblage of carbonate-analcime-anhydrite, while authigenic kaolinite is found in some strata.

浅埋藏期以碳酸盐～沸石～硬石膏组征。

The shallow polyhalite potash deposit in Sichuan are distributed in the north plunge top of Huayingshan anticline where is anhydrock of earlier Mesozoic Triassic period.

四川浅层杂卤石钾矿分布于华蓥山背斜北倾没端下中三统之硬石膏岩层中。