Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by formation process]

Narrower term/s

• concretion
• speleothems[+]
  • stalagmites
  • stalactites
• Lagerstätten [NP]

Anotations

Scope note:

A mass or layer of matter of varying thickness that has subsided or been precipitated from a fluid medium onto another mass of material, or has collected in one place by any natural process.