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                          Pleistogene Informal Period
 
                 From 1.806 +/- 0.005 To -5.5012e-005 +/- 0 Ma
 
  Start Defined By:  Just above top of magnetic polarity chronozone C2n 
     (Olduvai) and the extinction level of calcareous nannofossil Discoaster 
     brouweri (base Zone CN13).  Above are lowest occurrence of calcareous 
     nannofossil medium Gephyrocapsa spp. and extinction level of planktonic 
     foraminifer Globigerinoides extremus.
  End Defined By:  Today (in Myr before 1950)
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Comment:  This is an archaic period name.  The ICS standard removes it in 
     favor of extending the Neogene to the Present Day.
 
 -- Overlaps With --
  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)
  Period: Neogene     (23.03 - -5.5012e-005)
 
 -- Preceeded By --
  Epoch:                Pliocene      (5.332 - 1.806)
  Sub-Epoch:            Late Pliocene (3.6 - 1.806)
  ICS Stage:            Gelasian      (2.588 - 1.806)
  Informal Sub-era:     Tertiary      (65.5 - 1.806)
  North American Stage: Blancan       (4.75 - 1.806)
 
 -- Contains the Following Epochs --
  Epoch: Pleistocene (1.806 - 0.01143)
  Epoch: Holocene    (0.01143 - -5.5012e-005)
 

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.