Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material

Narrower term/s

• modified bituminous material[+]
  • coal tar [NP]
  • coke (bituminous)
  • naphthalene (bituminous material)
• natural bituminous material[+]
  • bitumen (material) [+]
    • asphalt (bituminous material) [+]
      • gilsonite
      • lake asphalt
      • modified asphalt [+]
      • natural asphalt
      • red asphalt
    • rock asphalt
    • asphaltite
  • pyrobitumen [+]
    • peat [+]
      • dredge peat
    • coal [+]
      • anthracite
      • bituminous coal
      • cannel coal
      • lignite [+]

Anotations

Scope note:

General term for certain mineral inflammable substances that are native hydrocarbons, more or less oxygenated, whether liquid, semi-solid, or solid. Examples include naphtha, petroleum, asphalt.