GeoWhen Database  

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                           Erian North American Stage
 
                          From 391.8 +/- 2.7 To 388 Ma
 
  Start Defined By:  Conodont, lowest occurrence of Polygnathus hemiansatus, 
     near base of goniatite Maenioceras Stufe.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Chinese Stage: Yingtangian     (397.5 - 391.4)
  Chinese Stage: Dongganglingian (391.4 - 385.3)
 
 -- A Substage of --
  Eon:       Phanerozoic     (542 - -5.5012e-005)
  Era:       Paleozoic       (542 - 251)
  Period:    Devonian        (416 - 359.2)
  Epoch:     Middle Devonian (397.5 - 385.3)
  ICS Stage: Givetian        (391.8 - 385.3)
 
 -- Preceeded By --
  ICS Stage:            Eifelian  (397.5 - 391.8)
  North American Stage: Ulsterian (416 - 391.8)
 
 -- Followed By --
  North American Stage: Senecan (388 - 370)
 

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.