GeoWhen Database  

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files

  
                                Emsian ICS Stage
                      (Sawkillian, Deer Parkian, Sipaian)
 
                      From 407 +/- 2.8 To 397.5 +/- 2.7 Ma
 
  Start Defined By:  Conodont, lowest occurrence of Polygnathus kitabicus (= 
     Po. dehiscens).
  End Defined By:  Conodont, lowest occurrence of Polygnathus costatus 
     partitus; major faunal turnover.
 
  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:  Zinzil'ban Gorge, SE of Samarkand, 
     Uzbekistan
 
 -- A Substage of --
  Eon:                  Phanerozoic    (542 - -5.5012e-005)
  Era:                  Paleozoic      (542 - 251)
  Period:               Devonian       (416 - 359.2)
  Epoch:                Early Devonian (416 - 397.5)
  North American Stage: Ulsterian      (416 - 391.8)
 
 -- Preceeded By --
  ICS Stage:     Praghian  (411.2 - 407)
  Chinese Stage: Yujianian (410 - 407)
 
 -- Followed By --
  Epoch:         Middle Devonian (397.5 - 385.3)
  ICS Stage:     Eifelian        (397.5 - 391.8)
  Chinese Stage: Yingtangian     (397.5 - 391.4)
 

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.