| Interface | strata | identifying characteristics | |||
| lithology | electrical property | seismic reflection | Palaeobios | ||
| SB4 | Jialingjiang Fm | Medium to thin layer micrite | Relative low GR, high Rt |
| tirolites-prolarmite Owenites-meekoceras |
| top of Feixianguan Fm | gypseous limestone, gypsum and Purple clayshale | high GR, low Rt | downlap | Claraia rich of Eumorphotis multiformis Flemingitsekoninckites, Ophiceras | |
| SB3 | bottom of the member 3 | micrise, marl | high GR, low Rt | onlap |
|
| top of the member 2 | oolitic limestone, micrite limestone | low GR, high Rt | toplap or truncation |
| |
| SB2 | bottom of the member 2 | mudstone | high GR, low Rt | onlap or downlap |
|
| top of the member 1 | limestone | low GR, high Rt |
|
| |
| SB1 | bottom of Feixiangan Fm | marlstone, limestone | high GR, low Rt | moderate reflection, onlap | Hindeodus parvus, Otoceras and Claraiawangi |
| Changxing Fm (Dalong Fm) | reef limestone, dolomitic limestone, siliceous rock and carbonaceous shale | low GR, high Rt |
| fusulinides, rugose corals, tabulate corals, trilobites hyolithids | |