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. fossiliferous limestone

Anotations

Scope note:

Limestone formed from pelagic sediment, specifically the ancient ocean bottom layer of soft mud, or “ooze," made from the shells of dead sea creatures belonging to the genus Globigerina. It is the chief building material of the Maltese islands.