pre-sinian meaning in English

前震旦纪

Pre - sinian paleostructural framework and major geological events in the huangling anticline , western hubei
鄂西黄陵背斜地区前南华纪古构造格架及主要地质事件
According to the type and scale of stratigraphic contact , four synthems such as basement ( pre - sinian ) , lower ( palaeozoic ) , middle ( mesozoic ) and upper ( cenozoic ) are divided , and seven sub - synthems are subdivided
本文依据地层接触关系的类型和规模，将本区划分为基岩(前震旦系) 、下(古生界) 、中(中生界) 、上(新生界)四个构造层和内部的七个构造亚层。
It agrees with the fact that the gabbro is intruded by late ordovician granitic pluton . the pre - sinian basement strata exposed in the north kunlun massif are later archean - neoproterozoic milan group , changcheng system kaqiang group , jixian system liushui formation and qingbaikou system sulu formation
被蛇绿岩所分隔的昆北地块上出露的前震旦纪基底地层为：晚太古代-新元古代米兰岩群，长城系卡羌岩群，蓟县系流水岩组和青白口系丝路岩组。