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

Narrower term/s

• Hudson bluestone
• North River bluestone
• Wyoming Valley stone

Anotations

Scope note:

Any of several types of stone that is dense, fine-grained and splits easily into thin smooth slabs; often used as flagstone. Bluestone is a commercial or cultural term that may encompass types of basalt, sandstone, or limestone, depending on the region in which it is used.