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                           Dolgellian Regional Stage
                          (Trempealeauan, Fengshanian)
 
                         From 492.5 To 488.3 +/- 1.7 Ma
 
  End Defined By:  Conodont, lowest occurrence of Iapetognathus fluctivagus; 
     just above base of Cordylodus lindstromi conodont Zone.  Just below lowest 
     occurrence of planktonic graptolites.
 
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Comment:  On scales that use a 2 stage Late Cambrian, the Dolgellian 
     frequently includes the Festiniogian
 
 -- Overlaps With --
  North American Stage:    Sunwaptan (493 - 491)
  North American Stage:    Ibexian   (491 - 471.8)
  Russian-Kazakhian Stage: Aksayan   (493 - 491.5)
 
 -- A Substage of --
  Eon:    Phanerozoic   (542 - -5.5012e-005)
  Era:    Paleozoic     (542 - 251)
  Period: Cambrian      (542 - 488.3)
  Epoch:  Late Cambrian (501 - 488.3)
 
 -- Preceeded By --
  Regional Stage: Festiniogian (496.8 - 492.5)
 
 -- Followed By --
  Period:           Ordovician       (488.3 - 443.7)
  Epoch:            Early Ordovician (488.3 - 471.8)
  ICS Stage:        Tremadocian      (488.3 - 478.6)
  Australian Stage: Datsonian        (488.3 - 485)
  European Stage:   Cressagian       (488.3 - 486)
 
 -- Contains the Following Stages --
  Australian Stage:        Payntonian (491 - 488.3)
  Russian-Kazakhian Stage: Batyrbayan (491.5 - 488.3)
 

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.