| Particle Size |
| Sediment |
| Rock |
| Coarse |
| Conglomerate |
| >256 mm |
| Boulder |
| 256-64mm |
| Cobble |
| 64 – 2 mm |
| Pebble |
| Medium |
| 2-.062 |
| Sand |
| Sandstone |
| Fine |
| .062-.0039 |
| Silt |
| Siltstone |
| <.0039 |
| Clay |
|
|
| Mudstone, |
|
| Shale |
|