... polymethylstyrene聚甲基苯乙烯 polymict复矿碎屑岩 polymictic多杂质的；复矿的 ...
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There are shales and sandstones, which are marked by downslope in the continental basins and called the formation of polymict sandstone.
往上变为近海湖盆沉积，由砂岩、页岩组成，具有陆相盆地滑坡的标志，称为复矿砂岩建造。
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