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    - iron hydroxides (1)
  - ilmenite (1)
  - iron oxides (1)
  - maghemite (1)
  - magnetite (1)
- silicates
  - asbestos (1)
  - framework silicates
    - feldspar group
      - plagioclase (2)
    - silica minerals
      - quartz (1)
  - ring silicates
    - cordierite (1)
  - sheet silicates
    - clay minerals
      - montmorillonite (2)
      - smectite (1)
    - serpentine group
      - chrysotile (2)
- sulfates (3)
- sulfides
  - pyrite (4)
Primary terms
- absolute age (3)
- Africa
  - Central Africa
    - Angola (3)
    - Congo Democratic Republic
      - Kivu Congo Democratic Republic
        
        Nyiragongo (1)
    - Equatorial Guinea (3)
  - East Africa
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    - Ethiopian Rift (2)
    - Kenya (1)
    - Mozambique (1)
    - Sudan (2)
    - Tanzania (1)
    - Uganda (2)
    - Zambia (1)
  - East African Lakes
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  - East African Rift (1)
  - Limpopo Basin (1)
  - Madagascar (1)
  - North Africa
    - Algeria (2)
    - Egypt
      - Alexandria Egypt (1)
      - Cairo Egypt (1)
      - Eastern Desert (2)
      - Nile Delta (2)
    - Morocco (1)
    - Tunisia (1)
  - Southern Africa
    - Kaapvaal Craton (1)
    - South Africa