Carbon and Oxygen Isotopic Stratigraphy of Mesoproterozoic Carbonate Sequences (1.6–1.4 Ga) from Yanshan in North China
Figure 1
Locations of sections and stratigraphic distribution of Mesoproterozoic in Yanshan, North China (modified after Zhu et al. [13]). (1) Gaoyuzhuang Formation and Yangzhuang Formation section in Jianshanzi, Kuancheng, Northern Hebei; (2) Wumishan Formation section in Weizhangzi, Lingyuan, Western Liaoning; (3) Hongshuizhuang -Tieling Formation section in Beizhangzi, Kuancheng, Northern Hebei; (4) Mesoproterozoic section at Guzifang, Chicheng, Northern Hebei (i.e., Xuanlong section); (5) Mesoproterozoic section at Jixian,Tianjin. (a) Mesoproterozoic strata distribution; (b) coastline; (c) locality; (d) section.
