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在稳定的上扬子地区，对志留系（４３９～４０９Ｍａ）进行了露头层序地层研究，建立了２个二级层序（不完整）和９个三级层序（ＯＳ１—ＯＳ９），每个三级层序的时限约３．３Ｍａ，ＯＳ１由龙马溪组和香树园组构成。雷家屯组包括２个三级层序。ＯＳ４由马脚冲组和溶溪组构成。秀山组和回星哨组构成ＯＳ５和ＯＳ６层序。ＯＳ７位于关底组下部。由关底组上部和妙高组下部组成ＯＳ８。ＯＳ９由妙高组上部和玉龙寺组构成。ＯＳ１和ＯＳ７为Ⅰ型层序，其余为Ⅱ型层序。三级层序均发育ＴＳＴ和ＨＳＴ，而缺乏ＬＳＴ和ＳＭＳＴ。层序的发育与全球海平面变化有密切关系。加里东运动造成的扬子地台持续上升及差异升降对二级层序的组成具有明显的影响。
In the stable upper Yangtze region, outcrop sequence stratigraphy was studied on the Silurian (439-409 Ma), and two second-level sequences (incomplete) and nine third-level sequences (OS1-OS9) A three-level sequence of time limit of about 3.3Ma, OS1 by the Longma Creek group and incense Park group. Lei Jiatun group includes two third-level sequence. OS4 from the horse Chong Chong group and composition. Xiushan group and Hui Xing sent group constitute OS5 and OS6 sequence. OS7 is located below the bottom of the group. OS8 consists of the upper part of the basement set and the lower part of the maximal set. OS9 from the Miaogao high Yulongsi group and composition. OS1 and OS7 are Type I sequences, and the rest are Type II sequences. TST and HST are all developed in tertiary order, but LST and SMST are absent. The development of the sequence is closely related to the global sea level change. The continuous rise of the Yangtze platform caused by the Caledonian movement and the differential rise and fall have a significant impact on the composition of the second-order sequence.