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geochronology methods
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geologic age
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        upper Oligocene
        
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        Penarth Group (1)
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metamorphic rocks
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meteorites
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  - stony irons
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      - angrite
        
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      - Martian meteorites
        
        ALH 84001 (3)
        
        SNC Meteorites
        
        chassignite
        
        Chassigny Meteorite (1)
        
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        shergottite
        
        ALHA 77005 (1)
        
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        Shergotty Meteorite (1)
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minerals
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        zircon (74)
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    - mica group
      - biotite (9)
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      - glauconite (1)
      - muscovite (7)
      - paragonite (2)
      - phengite (2)
      - phlogopite (6)
    - petalite (1)
    - serpentine group
      - berthierine (2)
- sulfates
  - alunite (1)
  - anhydrite (1)
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  - gypsum (2)
  - jarosite (1)
  - schwertmannite (2)
- sulfides
  - galena (1)
  - molybdenite (1)
  - pyrrhotite (2)
  - troilite (2)
- sulfosalts
  - sulfantimonites
    - tetrahedrite (1)
- tungstates (1)
- uranium minerals (1)
- vanadates (1)
Primary terms
- absolute age (213)
- academic institutions (1)
- Africa
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  - Central Africa
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  - East Africa
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  - North Africa
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  - Southern Africa
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    - Kalahari Craton (3)
    - Karoo Basin (12)
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    - Namibia
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    - South Africa
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      - KwaZulu-Natal South Africa (4)
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    - Zimbabwe (1)
  - West African Shield (1)
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