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                               Gelasian ICS Stage
                                  (Waltonian)
 
                   From 2.588 +/- 0.005 To 1.806 +/- 0.005 Ma
 
  Start Defined By:  Isotopic stage 103, base of magnetic polarity chronozone 
     C2r (Matuyama).  Above are extinction levels of calcareous nannofossil 
     Discoaster pentaradiatus and D. surculus.
  End 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.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Global Stratotype Section and Point:  Nicola Bed, Monte San Nicola, Gela, 
     Sicily, Italy
 
 -- Overlaps With --
  Australian Stage:  Yatalan     (3.4 - 2)
  Californian Stage: Wheelerian  (1.9 - 0.01143)
  Californian Stage: Repettian   (2.9 - 2.2)
  Japanese Stage:    Suchian     (3 - 1.9)
  Japanese Stage:    Kechienjian (1.9 - 1.5)
  New Zealand Stage: Nukumaruan  (1.96 - 1.1)
  New Zealand Stage: Mangapanian (2.6 - 1.96)
 
 -- A Substage of --
  Eon:                  Phanerozoic   (542 - -5.5012e-005)
  Era:                  Cenozoic      (65.5 - -5.5012e-005)
  Period:               Neogene       (23.03 - -5.5012e-005)
  Epoch:                Pliocene      (5.332 - 1.806)
  Sub-Epoch:            Late Pliocene (3.6 - 1.806)
  Informal Sub-era:     Tertiary      (65.5 - 1.806)
  North American Stage: Blancan       (4.75 - 1.806)
 
 -- Preceeded By --
  ICS Stage: Piacenzian (3.6 - 2.588)
 
 -- 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 Stages --
  Californian Stage: Venturian (2.2 - 1.9)
 

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.