伴随着火山活动，始新世英云闪长岩侵入白垩系火山岩地层。
Combining with volcanic activities, Eocene hypabyssal rocks, tonalite, intruded in Cretaceous volcanic strata.
茅兴块段含盐系地层主要为始新统阜宁组四段。
Maoxing block saliferous strata are mainly in 4 th Member, Funing Formation, Eocene Series.
柴达木盆地西部已找到17个第三系油源的油田，其主要烃源岩层位是陆相始新统下干柴沟组。
In west Qaidm Basin, 17 oilfields with Tertiary source rocks have been found. The main source rocks are Lower Ganchaigou Formation of terrestrial facies of Eocene.
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