铁船山组1. The Tiechuanshan Formation is one of the most important volcanic formation along the northern margin of the Yangtze Craton,and is located in the Beiba area. 扬子克拉通地壳的生成始于太古宙,但依据目前的研究成果,其主体形成于元古宙,对位于扬子克拉通北缘,分布在碑坝地区重要的基底岩系之一...