紫灰色
Three types of lithofacies are recognized for the Middle Triassic Badong Formation in Shizhu, Chongqing, including: ① purplish red and grayish green mudstone and shale; ② brownish yellow, purplish red and grayish brown lithic quartz sandstone, and ③ light grey carbonate rocks.
重庆石柱中三叠统巴东组有3种主要岩相类型:①紫红、灰绿色泥页岩,②褐黄、紫红、灰褐色岩屑石英砂岩,③浅灰色碳酸盐岩;
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