洼陷，读音wā xiàn，汉语词语，指凹陷。
三角洲的物源主要来自洼陷的东部和南坡。
The provenance of delta is the eastern and south slope of the sag.
本文主要根据资源丰度对洼陷进行了贫—富分级。
This paper classifies subsags into various oil-rich orders mainly based on resource abundance.
富林洼陷油气从烃源岩中排出的主要动力是压实作用。
The compaction is the main force that expels the hydrocarbon from source rocks in Fulin subsag.
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