transgression deposits 中文意思是什麼
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Chang - 6 oil - bearing beds, one of the most important oil - bearing beds in yanchang formation, is a set of progradational deposits, which is formed by rivers pouring into the shallow - water platform of the lake after the greatest transgression in chang - 7 stage
作為陜北延長組主力油層之一的長6油層組，是在長7最大湖進之後形成的淺水三角洲背景下，山河流注入充填而成的一套水退型沉積。
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