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根据华北地台东部寒武系露头层序地层研究，将张夏组划分为两个正层序，其中上部正层序（５３０－５２５ＭａＢ．Ｐ．，三叶虫带Ａｍｐｈｏｔｏｎ－Ｔａｉｔｚｕｉａ带至Ｄａｍｅｓｅｌａ带）由４个亚层序和１７－２３个小层序组成，其中正层序和亚层序具有高分辨率区域地层对比意义。每一级层序均表现为向上变浅和变粗进积型序列，底部常以间断－加深面或洪泛面为界。该时期的海平面变化具有高频振荡特点，构成一个三级复合海平面变化旋回。由不同级别层序所反映的海平面变化旋回可以分别与天文周期的奥特周期（２—５Ｍａ）、米兰科维奇长周期（０．１—０．４Ｍａ）和米兰科维奇短周期（０．０２—０．０４Ｍａ）相对比。据层序地层和相序及相模式的研究，识别出６种类型的小层序，陆棚盆地至上缓坡显示出由Ａ—Ｆ类型的规律性变化。
According to the study of the Cambrian outcrop sequence stratigraphy in the eastern part of North China, the Zhangxia Formation is divided into two positive sequences, of which the upper positive sequence (530-525MaB.P., Trilobite zone Amphoton-Taitzuia to Damesela zone ) Consists of 4 sub-sequences and 17-23 small sequences, of which the positive and sub-sequences have high-resolution regional stratigraphic contrast. The sequence of each level shows ascending shallow and progradation sequence, the bottom often discontinuous - deepening or flooding boundary. During this period, the sea level change has the characteristics of high-frequency oscillation and constitutes a three-level composite sea level change cycle. The sea level change cycles reflected by the different levels of sequence can be compared with those of the astronomical period Otsu cycle (2-5Ma), Milankovitch long period (0.1-0.4Ma) and Milankovitch short period ( 0.02-0.04Ma) relative ratio. According to the study of sequence stratigraphy, phase sequence and facies model, six types of small sequence are identified, and the gentle slope of continental shelf basin shows the regular change of A-F type.