在江绍断裂北西沿线出露了厚达数千米的晚前寒武纪火山碎屑建造。它们曾被划分为３个构造层，即中元古构造层、晚元古构造层和震旦系构造层。由于基础地质研究的进展，以及同位素年代资料的积累，这套地层的时代有必要重新确定。１双溪坞群的时代及形成环境代表性剖面位于... Prehistoric Cambrian volcanic debris was found thickly up to several kilometers along the northwestern part of the Jiang Shao fault. They have been divided into three tectonic layers, that is, Proterozoic, Proterozoic and Sinian strata. Due to the progress of basic geological research and the accumulation of isotopic data, the age of this formation needs to be redefined. 1 Shuangxiwuqun era and the formation of the environment representative profile located in ...