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. siliceous sandstone

Anotations

Scope note:

A brown to light-gray siliceous sandstone from Aquia Creek in Stafford County, Virginia. It contains rounded, coarse to fine grains of quartz as well as scattered pebbles and clay pellets as big as 1 inch in diameter; it splits easily in any desired direction. Aquia Creek sandstone was one of the important building stones in early Washington, D.C.