precambrian system 中文意思是什麼
precambrian system
解釋
前寒武系- precambrian : adj. 【地質學；地理學】前寒武紀的。n. 〈the Precambrian 〉 前寒武紀。
- system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
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Eight aspects related to the study of early precambrian metamorphic stratigraphy are dealt with in this paper : general situation of the study ; complexity of the stratigraphy and difficulties of the study ; thoughts and methods of the study ; division of rock suite, rock group and complex rock ; researches on important regional discordances ; types and characteristics of protolith and recovery of palaeoenvironment ; correct differentiation of the metamorphic strata, ttg rock system and other metamorphic plutonic rocks ; determination of the ages of the metamorphic strata
摘要主要論述了與早前寒武紀變質地層（學）有關的8個方面的問題：早前寒武紀變質地層的研究概況；早前寒武紀變質地層的復雜性和研究難度；早前寒武紀變質地層研究的思路和工作方法；早前寒武紀變質巖石地層單位巖群、巖組和雜巖的劃分問題；重要區域性不整合的研究；鑒定變質地層的原巖類型、巖石性質和恢復古環境；正確區分變質地層和ttg巖系以及其他變質深成巖；變質地層時代的確定。 -
In the new plan, the position of the studied strata in the stratigraphic column of late precambrian of china shows an impotant relation between sinian system and qingbaikou system on the geologic and biologic evolution
新方案中這些地層在我國晚前寒武紀地層柱中的位置，反應出了震旦系與青白口系的地史演化及生物演化間的重要關系。
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