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                      Atokan/Derryan North American Stage
                               (Atokan, Derryan)
 
                          From 311.7 +/- 1.1 To 308 Ma
 
  Start Defined By:  Near lowest occurrences of Declinognathodus donetzianus 
     and/or Idiognathoides postsulcatus conodont species, and fusulinid species 
     Aljutovella aljutovica.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Chinese Stage: Dalanian  (313 - 310)
  Chinese Stage: Mapingian (310 - 299)
 
 -- A Substage of --
  Eon:            Phanerozoic          (542 - -5.5012e-005)
  Era:            Paleozoic            (542 - 251)
  Period:         Carboniferous        (359.2 - 299)
  Epoch:          Pennsylvanian        (318.1 - 299)
  Sub-Epoch:      Middle Pennsylvanian (311.7 - 306.5)
  ICS Stage:      Moscovian            (311.7 - 306.5)
  European Epoch: Silesian             (326.4 - 299)
  European Stage: Westphalian          (315 - 306.5)
 
 -- Preceeded By --
  Sub-Epoch:     Early Pennsylvanian (318.1 - 311.7)
  ICS Stage:     Bashkirian          (318.1 - 311.7)
  Russian Stage: Melekesskian        (313.4 - 311.7)
 
 -- Followed By --
  North American Stage: Desmoinian (308 - 306.5)
  Russian Stage:        Podolskian (308 - 307.2)
 
 -- Contains the Following Stages --
  Russian Stage: Vereiskian  (311.7 - 309.2)
  Russian Stage: Kashirskian (309.2 - 308)
 

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.