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                              Thanetian ICS Stage
                             (Landenian, Heersian)
 
                      From 58.7 +/- 0.2 To 55.8 +/- 0.2 Ma
 
  Start Defined By:  Magnetic polarity chronozone, base of C26n, is a temporary 
     assignment.
  End Defined By:  Base of negative carbon-isotope excursion.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  New Zealand Stage:    Teurian      (65.5 - 56.5)
  New Zealand Stage:    Waipawan     (56.5 - 52)
  North American Stage: Tiffanian    (60.5 - 56)
  North American Stage: Clarkforkian (56 - 55.5)
 
 -- A Substage of --
  Eon:               Phanerozoic    (542 - -5.5012e-005)
  Era:               Cenozoic       (65.5 - -5.5012e-005)
  Period:            Paleogene      (65.5 - 23.03)
  Epoch:             Paleocene      (65.5 - 55.8)
  Sub-Epoch:         Late Paleocene (58.7 - 55.8)
  Australian Stage:  Wangerripian   (61.7 - 52)
  Californian Stage: Ynezian        (61.5 - 55.8)
  Informal Sub-era:  Tertiary       (65.5 - 1.806)
 
 -- Preceeded By --
  Sub-Epoch: Middle Paleocene (61.7 - 58.7)
  ICS Stage: Selandian        (61.7 - 58.7)
 
 -- Followed By --
  Epoch:             Eocene       (55.8 - 33.9)
  Sub-Epoch:         Early Eocene (55.8 - 48.6)
  ICS Stage:         Ypresian     (55.8 - 48.6)
  Californian Stage: Bulitian     (55.8 - 53)
 
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