GeoWhen Database  

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files

  
                           Gleedonian Regional Stage
 
                         From 425.4 To 422.9 +/- 2.5 Ma
 
  End Defined By:  Imprecise.  Just below base of local acritarch Leptobrachion 
     longhopense range zone.  May be near base of Neodiversograptus nilssoni 
     graptolite zone.
 
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- A Substage of --
  Eon:                  Phanerozoic    (542 - -5.5012e-005)
  Era:                  Paleozoic      (542 - 251)
  Period:               Silurian       (443.7 - 416)
  Epoch:                Early Silurian (443.7 - 422.9)
  Sub-Epoch:            Wenlock        (428.2 - 422.9)
  ICS Stage:            Homerian       (426.2 - 422.9)
  Australian Stage:     Melbournian    (428.2 - 416)
  Chinese Stage:        Guandian       (425.5 - 422)
  North American Stage: Niagaran       (438 - 421.3)
 
 -- Preceeded By --
  Regional Stage: Whitwellian (426.2 - 425.4)
 
 -- Followed By --
  Epoch:     Late Silurian (422.9 - 416)
  Sub-Epoch: Ludlow        (422.9 - 418.7)
  ICS Stage: Gorstian      (422.9 - 421.3)
 

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.