The distribution of the middle upper Zhangxia Formation, Cambrian in Yishui area, Shandong, is controlled by Yishui rift (including F 4 and F 3 faults).

• 山东沂水地区寒武系张夏组中上部地层的分布，受控于沂沭断裂（F4和F3断裂），分为西区、中区和东区。