Metamorphic basement of the jiangnan Proterozoic Paleo - island arc mainly consists of low - grade metamorphic volcanic sedimentary rocks.
江南元古宙古岛弧的基底变质岩主要由浅变质的岛弧火山—沉积岩系组成.
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In ESR dating, the age is given by the ratio of paleo - dose to annual dose.
在ESR测年研究中,被测样品的年代是通过样品的古剂量与样品所接受的年剂量的比值得到的.
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Due to obvious paleo - karst erosion flutes and platform co - exit at the top of the weathering crust.
由于古岩溶作用明显,风化壳顶面具有显著的岩溶地貌特征,形成了独特的沟台并存格局.
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The Cambrian and Ordovician are important exploration target strata in Leshan - Longnvsi paleo - uplift area.
寒武系和奥陶系是四川盆地乐山 — 龙女寺古隆起区的重要勘探目的层系.
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