Table 1 Comparison table of stratigraphic division in the reservoir area.
From: Study of in situ stress inversion of deeply incised valleys considering the river evolution process
Chronostratigraphy | Lithostratigraphy | Sedimentary structure | Sedimentary environment | Biostratigraphy and age | ||
|---|---|---|---|---|---|---|
Epoch | Series | Formation | ||||
Cenozoic Era | Quaternary Period | Holocene Epoch | Deposits such as alluvial, flood, colluvial, debris, residual, glacial, landslide, and mudflow are distributed in areas such as river floodplains, first terraces, valley mouths, and foothills. | Loose Deposits | Weathering, Rivers, Glaciers, Gravity, etc. | Level I Terrace: 0.05 million years (Quartz) |
Pleistocene Epoch | Alluvial, flooding, residual accumulation, moraine, wind-formed loess, and other types of accumulation are distributed across the II to VI terraces, the razing surface, and other sections. | Loose Deposits - Semi-consolidated | Weathering, Rivers, Wind, Glaciers, Gravity, etc. | Level II Terrace: 0.02 million years (Calcium Carbonate) Level III Terrace: 0.101 million years (Quartz) Level IV Terrace: 0.15 million years (Quartz) Level V Terrace: 0.317 million years (Quartz) | ||
