Carbon and Oxygen Isotopic Stratigraphy of Mesoproterozoic Carbonate Sequences (1.6–1.4 Ga) from Yanshan in North China

Figure 2

Mesoproterozoic stratigraphic columns and regional correlation in Yanshan, North China. (1) Dolostone; (2) muddy dolostone; (3) dolomitic limestone; (4) mud bearing dolostone; (5) sandy dolostone; (6) stromatolitic dolostone; (7) mudstone; (8) breccio-dolostone; (9) shale; (10) chert dolostone; (11) calcite dolostone; (12) nodular limestone; (13) siliceous dolostone; (14) MT limestone; MT-Molar-tooth structure.