stratum | lithology | Resistivity (Ω·m) | Log resistivity Lg (Ω·m) | remarks | ||
Cenozoic | Quaternary | Q | Silt, clay, silt, fine sand | 0 - 100 | 0 - 2.0 | The average of resistivit-ies |
Neogene | N | Mudstone, siltstone, onglomerate | 9.1 - 13.9 | 0.96 - 1.14 | ||
Lower Paleozoic | Ordovician | O | Limestone | 800 - 1500 | 2.9 - 3.2 | |
Cambrian System | ∈ | Limestone, Marl, shale | 254 - 608 | 2.4 - 2.8 | ||
Upper Proterozoic | Qingbaikou | Qn | Sand shale intercalated with carbonate rock | 136 - 248 | 2.13 - 2.40 | |
Mesoproterozoic | Jixian | Jx | Sand shale intercalated with carbonate rock | 540 - 1000 | 2.73 - 3 | |
Changcheng | Ch | Dolomite, marl, shale | >600 | >2.77 | ||
Archean |
| Ar | gneiss | >700 | >2.84 |