Sedimentary environment and petrological features of organic-rich fine sediments in shallow water overlapping deposits: A case study of Cambrian Yuertus Formation in northwestern Tarim Basin, NW China

JIN Zhimin,TAN Xiucheng,TANG Hao,SHEN Anjiang,QIAO Zhanfeng,ZHENG Jianfeng,LI Fei,ZHANG Shixuan,CHEN Lei,ZHOU Chenggang

Fig. 8. Small-scale sedimentary overlapping features in the Yuertus Formation. (a) Overlapping of thin interbedded shale and siliceous rock at the bottom of the Yuertus Formation over karst highlands of the Qigebulake Formation, Sugaite section. The tape for scale is 60 cm in length. (b) A sketch of Fig. 8a. (c) Overlapping of thin interbedded shale and limestone over the diamictic grainstone, Xiaoerbulake section. The hammer for scale is 30 cm long. (d) A sketch of Fig. 8c, in which the red triangular indicates where the overlapping ends at the relative slope break of the exposed surface.