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                              Bartonian ICS Stage
                                  (Auversian)
 
                      From 40.4 +/- 0.2 To 37.2 +/- 0.1 Ma
 
  Start Defined By:  Near extinction of calcareous nannofossil Reticulofenestra 
     reticulata.
  End Defined By:  Near lowest occurrence of calcareous nannofossil 
     Chiasmolithus oamaruensis (base Zone NP18).
 
  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:    Bortonian  (44 - 40)
  North American Stage: Uintan     (45.4 - 40)
  North American Stage: Duchesnean (40 - 37)
 
 -- A Substage of --
  Eon:               Phanerozoic   (542 - -5.5012e-005)
  Era:               Cenozoic      (65.5 - -5.5012e-005)
  Period:            Paleogene     (65.5 - 23.03)
  Epoch:             Eocene        (55.8 - 33.9)
  Sub-Epoch:         Middle Eocene (48.6 - 37.2)
  Australian Stage:  Johannian     (52 - 36)
  Californian Stage: Narizian      (48 - 35)
  Informal Sub-era:  Tertiary      (65.5 - 1.806)
 
 -- Preceeded By --
  ICS Stage: Lutetian (48.6 - 40.4)
 
 -- Followed By --
  Sub-Epoch: Late Eocene (37.2 - 33.9)
  ICS Stage: Priabonian  (37.2 - 33.9)
 
 -- Contains the Following Stages --
  New Zealand Stage: Kiaitan (40 - 37.2)
 

This page was automatically generated from the GeoWhen database (version 1.1.0).  Please read the introduction regarding the accuracy and reliability of this information.  Comments, corrections, and additions can be sent to geowhen@robertrohde.com.  References to published academic literature are preferred.

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files


2003-2005 GeoWhen Database
Prepared By Robert A. Rohde


This page was last updated on Tuesday, January 18, 2005.