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. carbonate rock
11. limestone
12. [limestone by composition]
13. [limestone by composition: aggregate type]
14. magnesian limestone
15. dolostone

Anotations

Scope note:

A light brown or buff-colored dolostone that is well-cemented, free of jointing, and ideally suited for building purposes. It is often used as a building stone in Toronto, Canada as it is quarried in southern Ontario; Queenston limestone caps the Niagara Escarpment. Before a quarry operation was begun at Queenston in about 1840, Scottish settlers exploited the limestone beds for building materials; the present quarry is one of the oldest in Canada.