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                             Lenian Regional Stage
 
                            From 524 To 513 +/- 2 Ma
 
  Start Based On:  Gradstein and Ogg, "A Phanerozoic time scale", _Episodes_, 
     v.19, no.1&2., 1996.
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Australian Stage: Ordian     (520 - 510)
  Chinese Stage:    Qungzusian (532 - 523)
 
 -- A Substage of --
  Eon:                  Phanerozoic    (542 - -5.5012e-005)
  Era:                  Paleozoic      (542 - 251)
  Period:               Cambrian       (542 - 488.3)
  Epoch:                Early Cambrian (542 - 513)
  North American Stage: Dyeran         (524.5 - 512)
 
 -- Preceeded By --
  Russian-Kazakhian Stage: Atdabanian (530 - 524)
 
 -- Followed By --
  Epoch:                   Middle Cambrian (513 - 501)
  Chinese Stage:           Maozhangian     (513 - 509)
  Russian-Kazakhian Stage: Amgan           (513 - 502)
 
 -- Contains the Following Stages --
  Chinese Stage:           Changlangpuan (523 - 518)
  Chinese Stage:           Longwangmioan (518 - 513)
  Russian-Kazakhian Stage: Botomian      (524 - 518.5)
  Russian-Kazakhian Stage: Toyonian      (518.5 - 513)
 
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