Trough cross-bedding is formed by unidirectional currents, typically in a fluvial or shallow marine environment. This structure is characterized by angled layers of sedimentary material that are deposited in a current-driven direction.
| Group I | Group II |
| P. Stylolite | 1. Liquefaction |
| Q. Pseudonodule | 2. Diagenesis |
| R. Current crescent | 3. Organo-sedimentary binding |
| S. Stromatolite | 4. Scouring |