According to geological age, it may be divided into Upper Triassic coal-bearing formation and Lower-Middle Jurassic clastic rock formation.
根据它的地质时代，划分为上三叠统含煤建造和中下侏罗统碎屑岩建造。
Therefore, the Lower-Middle Jurassic is selected as the main target horizon for sandstone-hosted uranium deposit, and the Lower Cretaceous as the minor one.
因此，将中下侏罗统确定为本区的主要找矿目标层，下白垩统为次要找矿目标层。
In terms of molecular geochemistry indexes, the hydrocarbon source rocks both in lower Jurassic and middle Jurassic can be classified as lake facies and swamp facies.
根据分子地球化学指标，下侏罗统和中侏罗统烃源岩都可划分为湖相和沼泽相两类。
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