之间的寒武系和奥陶系过渡时期是在进化史上的关键。
The transition between the Cambrian and the Ordovician periods is crucial in evolutionary history.
本文还对笔石动物群的性质进行了分析，与邻区和国外相当地层进行了对比，并讨论了本区寒武系与奥陶系界线。
The nature of graptolite fauna, the correlation of the graptolite-bearing strata with that in other area and the Cambrian-Ordovician boundary are also discussed.
按照单项组分、综合评价法，对邵庄—双庙水源地第四系孔隙水和寒武—奥陶系岩溶水环境质量现状进行了评价。
Evaluation of Shaozhuang-Shuangmiao water site Quaternary pore water and Cambro-Ordovician karstic water environmental quality status quo were based on single constituent comprehensive evaluation.
油源对比表明有三套烃源岩，即寒武奥陶系、石炭二叠系和侏罗系生油岩。
The correlation of oil - oil indicated that the oil can be devided into three species at least ;
据生烃期，寒武系—奥陶系源岩含油气系统进一步划分为早期和晚期两个亚系统。
The petroleum system is divided into the early and late subsystems by hydrocarbon generation periods.
寒武系、奥陶系地层主要为灰岩和白云岩，其问赋存有较丰富的岩溶裂隙水。
There is abundant karst fissure water in the limestone and dolomite of Cambrian and Ordovician.
油-源对比表明有三套烃源岩，即寒武-奥陶系、石炭-二叠系和侏罗系生油岩。
The correlation of oil-source rock indicated that there are three sets of source rock, namely Cambrian-Ordovician, Carboniferous-Permian and Jurassic system.
油-源对比表明有三套烃源岩，即寒武-奥陶系、石炭-二叠系和侏罗系生油岩。
The correlation of oil-source rock indicated that there are three sets of source rock, namely Cambrian-Ordovician, Carboniferous-Permian and Jurassic system.
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