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. sedimentary rock
9. [sedimentary rock by composition]
10. sandstone
11. [sandstone by composition or appearance]
12. [sandstone by composition: aggregate type]
13. argillaceous sandstone
14. bluestone

Anotations

Scope note:

A dark bluish gray sandstone quarried on the west side of the Catskill Mountains near the Delaware River (formerly North River) in New York. In the 19th century, North River bluestone was used for sidewalks and curbs.