前古生界 meaning in English
primary group
Examples
- Drilling data prove that there are bumpy oil and gas in jurassic and hydrocarbon traces in the prepaleozoic located in the east side of oujiang depression ( also named as lishui depression )
钻探证明，瓯江凹陷东侧（又称丽水凹陷）的侏罗系中有烃源岩，前古生界的变质岩中有油气显示。