Table 1 Description of stratum lithology in Qiaojia County.
Erathem | System | Series | Stratum symbol | Description |
|---|---|---|---|---|
Cenozoic erathem | Quaternary system | Holocene series | Q4 | Gravel, sand, sandy clay, clay, and humus |
Upper Pleistocene series | Q3 | Moraine gravel | ||
Middle pleistocene series | Q2 | Moraine conglomerate and limestone | ||
Unclassified series | Q | – | ||
Neogene system | Unclassified series | N | Conglomerate and carbonaceous claystone | |
Mesozoic erathem | Cretaceous system | Lower series | K1 | Conglomerate |
Jurassic systerm | Lower series | J1 | Clastic rock | |
Triassic system | Upper series | T3 | Mudstone, sandstone, and conglomerate | |
Lower series | T1 | Purple mudstone and siltstone shale | ||
Unclassified series | T | – | ||
Upper paleozoic erathem | Permian System | Upper series | P2 | Basalt |
Lower series | P1 | Limestone, carbonate rock, sandstone, shale, bauxite, and carbonaceous shale sandwiched coal seam | ||
Carboniferous system | Middle series | C2 | Carbonate rock | |
Lower series | C1 | Carbonate rock | ||
Devonian system | Upper series | D3 | Carbonate rock | |
Middle series | D2 | Clastic rock, carbonate rock, and marl rock | ||
Lower series | D1 | Clastic rock | ||
Lower palaeozoic erathem | Silurian system | Upper series | S3 | Shale |
Middle series | S2 | Argillaceous rock, carbonate rock, and clastic rock | ||
Ordovician system | Middle and upper series | O2-3 | Dolomite | |
Middle series | O2 | Clastic rock and carbonate rock | ||
Lower series | O1 | Argillaceous rock, siltstone, and sandstone | ||
Cambrian system | Upper series |  ∈ 3 | Dolomite | |
Middle series |  ∈ 2 | Shale, dolomite, clastic rock, argillaceous dolomite, and gypsum rock | ||
Lower series |  ∈ 1 | Fine sandstone, mudstone, dolomite, limestone, siltstone, argillaceous rock, and shale | ||
Upper proterozoic erathem | Sinian system | Upper series | Zb | Dolomite |
Lower series | Za | Quartz sandstone, gravel sandstone, feldspar rock, and clastic sandstone | ||
Lower proterozoic erathem | Changchengian System | Huangcaoling group | Zc | Phyllite and slate |
