Siltstone
| Type | Sedimentary Rock |
| Origin | Detrital/Clastic |
| Texture | Clastic; Fine-grained (0.004 – 0.06 mm) |
| Composition | Quartz, clay minerals |
| Color | Reddish brown |
| Miscellaneous | Massive; Feels slightly gritty |
| Depositional Environment | Flood plain, Delta, or Mid-continental Shelf |