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                           Tertiary Informal Sub-era
 
                         From 65.5 +/- 0.3 To 1.806 Ma
 
  Start Defined By:  Iridium Anomaly.  Associated with a major extinction 
     horizon (foraminifers, calcareous nannofossils, dinosaurs, etc.)
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Comment:  Tertiary is not a formally recognized ICS division.  It's end 
     varies depending on how the Quaternary is defined.  See that entry for 
     explanation.
 
 -- Overlaps With --
  Period:            Neogene     (23.03 - -5.5012e-005)
  Californian Stage: Wheelerian  (1.9 - 0.01143)
  Japanese Stage:    Kechienjian (1.9 - 1.5)
  New Zealand Stage: Nukumaruan  (1.96 - 1.1)
 
 -- A Substage of --
  Eon: Phanerozoic (542 - -5.5012e-005)
  Era: Cenozoic    (65.5 - -5.5012e-005)
 
 -- Preceeded By --
  Era:            Mesozoic        (251 - 65.5)
  Period:         Cretaceous      (145.5 - 65.5)
  Epoch:          Late Cretaceous (99.6 - 65.5)
  ICS Stage:      Maastrichtian   (70.6 - 65.5)
  European Epoch: Senonian        (89.3 - 65.5)
  Japanese Stage: Hetonian        (77.1 - 65.5)
  Regional Stage: Rognacian       (68 - 65.5)
 
 -- Followed By --
  Epoch:                Pleistocene       (1.806 - 0.01143)
  ICS Stage:            Early Pleistocene (1.806 - 0.781)
  Australian Stage:     Werrikooian       (1.806 - 1)
  Informal Period:      Pleistogene       (1.806 - -5.5012e-005)
  Informal Sub-era:     Quaternary        (1.806 - -5.5012e-005)
  North American Stage: Irvingtonian      (1.806 - 0.3)
 
 -- Contains the Following Periods --
  Period: Paleogene (65.5 - 23.03)
 

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.