Table 1 Grade division scheme of architectural elements.
Architecture interface level | Corresponding base level cycle | Architectural element scale | Genetic interpretation |
|---|---|---|---|
Level 0 | – | Lamination | Water ripple |
Level 1 | – | Layer system/Layer group/Micro bottom shape | Single lithofacies |
Level 2 | – | Lithofacies/medium bottom shape | Single lithofacies superposition |
Level 3 | – | Internal accretion of monogenetic sand body | Continuous sedimentary sequence controlled by weak sedimentary discontinuity |
Level 4 | Ultrashort-term base level cycle | Single microfacies/single origin sand body/large bottom shape | Single sand body such as a single distributary channel or single estuary dam |
Level 5 | Short-term base level cycle | Single microfacies complex/single channel belt | Compound distributary channels, underwater distributary channels, and estuary dam complexes, etc |
Level 6 | Medium-term base level cycle | Single-layer microfacies complex/composite channel belt | Overlay of compound distributary channel sand bodies |
