地层接触关系表明白大畈组为早白垩世火山岩。
The stratigraphic contact shows that the Baidafan Formation is volcanic rocks of Early Cretaceous age.
郯庐断裂带中生代火山活动主要发生在早白垩世，形成了一套以橄榄安粗岩系为主的火山岩。
Mesozoic volcanic activities of the Tan Lu fault zone mainly appeared in Early Cretaceous and resulted in a set of volcanic rocks characterized by shoshonite series.
松辽盆地徐家围子断陷晚侏罗世-早白垩世期间火山岩十分发育，火山喷发岩的盆地充填样式与其在盆地中喷发的构造位置和构造断阶样式有关。
The basin filling geometric pattern of volcanic eruptive rocks depends on both of the eruptive locations in a basin and structural styles of fault terraces.
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