Discussion on classification and naming scheme of fine-grained sedimentary rocks

PENG Jun,ZENG Yao,YANG Yiming,YU Ledan,XU Tianyu

Table 5 Distribution characteristics of material components of typical fine-grained sedimentary rocks in the fourth member of the Paleogene Shahejie Formation in Dongying Sag

No. Rock type Macroscopic characteristics Microscopic characteristics Contents of minerals/% TOC/% 1 Organic-rich clayey carbonate rock/ organic-rich clayey silty limestone > 2 2 Organic-lean silt- bearing clayey carbonate rock/organic-lean silt-bearing clayey micritic limestone < 0.5 3 Organic-bearing felsic limy claystone 0.5-2.0 4 Organic-hybrid dolomitic hybrid fine-grained sedimentary rock < 0.5