GeoWhen Database  

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files

  
                               Givetian ICS Stage
                     (Tioughniogan, Taghanican, Geneseean)
 
                     From 391.8 +/- 2.7 To 385.3 +/- 2.6 Ma
 
  Start Defined By:  Conodont, lowest occurrence of Polygnathus hemiansatus, 
     near base of goniatite Maenioceras Stufe.
  End Defined By:  Conodont, lowest occurrence of Ancyrodella rotundiloba 
     (defines base of Lower Polygnathus asymmetricus conodont Zone).
 
  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:  Jebel Mech Irdane ridge, Tafilalt, 
     Morocco
 
 -- Overlaps With --
  Chinese Stage:        Yingtangian (397.5 - 391.4)
  North American Stage: Senecan     (388 - 370)
 
 -- 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)
 
 -- Preceeded By --
  ICS Stage:            Eifelian  (397.5 - 391.8)
  North American Stage: Ulsterian (416 - 391.8)
 
 -- Followed By --
  Epoch:     Late Devonian (385.3 - 359.2)
  ICS Stage: Frasnian      (385.3 - 374.5)
 
 -- Contains the Following Stages --
  Chinese Stage:        Dongganglingian (391.4 - 385.3)
  North American Stage: Erian           (391.8 - 388)
 

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.