Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. rock (inorganic material)
8. [rock by form]

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by composition
6. inorganic material
7. rock
8. rock by form
9. stone
10. stone by function

Narrower term/s

• beach cobble

Anotations

Scope note:

A rock fragment, rounded or otherwise abraded, with a diameter between 64 and 256 mm, being larger than a pebble and smaller than a boulder. The term can also refer more specifically to a rounded stone suitable for use in paving or other construction.