Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. combination inorganic/organic material
7. soil
8. [soil by composition or origin]
9. sediment

Anotations

Scope note:

All sediment particles, regardless of mineral origin, that fall within a specified size range between those of sand and clay. An unconsolidated aggregation of particles is also called silt; a consolidated aggregate, silt-stone.