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        Meramecian
        
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        titanite (2)
      - zircon group
        
        zircon (5)
    - sorosilicates
      - epidote group
        
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  - ring silicates
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  - sheet silicates
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    - clay minerals
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      - kaolinite (5)
      - montmorillonite (1)
      - smectite (7)
    - illite (8)
    - mica group
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    - palygorskite (1)
    - pyrophyllite (1)
    - sericite (1)
    - talc (1)
- sulfates
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  - anhydrite (2)
  - gypsum (1)
  - iron sulfates (1)
- sulfides
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  - chalcopyrite (2)
  - copper sulfides (1)
  - galena (1)
  - molybdenite (1)
  - pentlandite (2)
  - pyrite (6)
  - pyrrhotite (2)
  - sphalerite (1)
  - sternbergite (1)
- sulfosalts
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  - sulfarsenites
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    - tennantite (1)
- tellurides (1)
- tungstates
  - ferberite (1)
Primary terms
- absolute age (16)
- academic institutions (1)
- Africa
  - Central Africa
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    - Gabon
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  - East Africa
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    - Lake Turkana (1)
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  - East African Lakes
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  - North Africa
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      - Berkine Basin (1)
    - Atlas Mountains
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        Anti-Atlas (1)