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Geology (66)
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The Leading Edge (8)
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Primary terms
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    - Polyplacophora (3)
    - Rostroconchia (2)
  - Porifera
    - Demospongea (1)
    - Hexactinellida (1)
    - Stromatoporoidea (2)
  - Protista
    - Foraminifera
      - Fusulinina
        
        Fusulinidae (1)
    - Radiolaria (1)
  - Vermes
    - Annelida (4)
    - Chaetognatha (1)
    - Nematoida (2)
    - Polychaeta
      - Serpulidae (1)
    - Priapulida (1)
- isostasy (5)
- isotopes
  - radioactive isotopes
    - Be-10 (1)
    - C-14 (14)
    - Cs-137 (1)
    - Pb-206/Pb-204 (1)
    - Pb-207/Pb-204 (2)
    - Pb-208/Pb-204 (2)
    - Tc-99 (1)
    - tritium (1)
  - stable isotopes
    - Ar-40/Ar-36 (1)
    - C-13 (2)
    - C-13/C-12 (21)
    - D/H (10)
    - deuterium (6)
    - Fe-56/Fe-54 (1)
    - He-4/He-3 (1)
    - Nd-144/Nd-143 (2)
    - Ne-22/Ne-20 (1)
    - Ne-22/Ne-21 (1)
    - O-18 (1)
    - O-18/O-16 (23)
    - Pb-206/Pb-204 (1)
    - Pb-207/Pb-204 (2)
    - Pb-208/Pb-204 (2)
    - S-34 (1)
    - S-34/S-32 (13)
    - Sr-87/Sr-86 (12)
- land subsidence (7)
- land use (8)