1958年,南岭地质队将韶关朱昌地区沿武水分布的一套浅变质岩系,称乐昌峡群,代表广东的震旦系。随着地质工作的深入,相继于连山英阳关地区及连平等地,以硅质岩为标志,均于下古生界下部划分出震旦系。但一直缺乏古生物依据,对其层序、岩性组合均未进行系统的描述。因此在前人资料的基础上,结合近年所获成果,叙述于后。 In 1958, Nanling geological team will Shaoguan Zhuchang area along Wushu distribution of a set of shallow metamorphic rocks, called Lechang Gorge Group, on behalf of the Guangdong Sinian. With the deepening of geological work, one after another in the Liangyang Yingyangguan area and even equal to the silicalite as a symbol, are divided in the lower part of the Lower Paleozoic Sinian. However, the paleontological evidence has been lacked and no systematic description of its sequence and lithology has been made. Therefore, on the basis of the information of our predecessors, combined with the achievements made in recent years, we will describe them later.