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                              Tortonian ICS Stage
 
                  From 11.608 +/- 0.005 To 7.246 +/- 0.005 Ma
 
  Start Defined By:  Last common occurrences of the calcareous nannofossil 
     Discoaster kugleri and the planktonic foraminifer Globigerinoides 
     subquadratus.  Associated with the short normal-polarity subchron C5r.2n.
  End Defined By:  Middle of magnetic polarity chronozone C3Br.1r; lowest 
     regular occurrence of the Globorotalia conomiozea planktonic foraminifer 
     group.
 
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Global Stratotype Section and Point:  Monte dei Corvi beach section, Ancona, 
     Italy
 
 -- Overlaps With --
  Australian Stage:     Bairnsdalian  (15 - 10.5)
  Australian Stage:     Mitchellian   (10.5 - 5)
  Californian Stage:    Mohnian       (13.5 - 7.5)
  Californian Stage:    Delmontian    (7.5 - 2.9)
  Japanese Stage:       Kaburan       (13.5 - 11.1)
  Japanese Stage:       Yuian         (9.5 - 3.6)
  New Zealand Stage:    Lillburnian   (15 - 11.5)
  New Zealand Stage:    Tongaporutuan (10 - 6)
  North American Stage: Clarendonian  (11.8 - 9)
  North American Stage: Hemphillian   (9 - 4.75)
 
 -- A Substage of --
  Eon:              Phanerozoic  (542 - -5.5012e-005)
  Era:              Cenozoic     (65.5 - -5.5012e-005)
  Period:           Neogene      (23.03 - -5.5012e-005)
  Epoch:            Miocene      (23.03 - 5.332)
  Sub-Epoch:        Late Miocene (11.608 - 5.332)
  Informal Sub-era: Tertiary     (65.5 - 1.806)
 
 -- Preceeded By --
  Sub-Epoch: Middle Miocene (15.97 - 11.608)
  ICS Stage: Serravallian   (13.65 - 11.608)
 
 -- Followed By --
  ICS Stage: Messinian (7.246 - 5.332)
 
 -- Contains the Following Stages --
  Japanese Stage:    Fujian  (11.1 - 9.5)
  New Zealand Stage: Waiauan (11.5 - 10)
 

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.