结果表明：地层中稀土元素含量的变化反映了物源环境，为地层划分提供了有效的信息；
The results show that changes of REE contents in strata reflect the matter sources and sedimentary environmental changes and may provide effectual information for stratum partitioning;
结果表明：地层中稀土元素含量的变化反映了物源环境，为地层划分提供了有效的信息；
The results show that changes of REE contents in strata reflect the matter sources and sedimentary environmental changes and may provide effectual information for stratum partitioning;
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