GeoWhen Database  

Introduction

Geologic Timeline
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Geologic Timeline
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A-Z Stage List

Regional Information

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                            Sevatian Regional Stage
 
                          From 211 To 203.6 +/- 1.5 Ma
 
  End Defined By:  Near lowest occurrence of ammonite Cochlocera, conodonts 
     Misikella spp. and Epigondolella mosheri, and radiolarian Proparvicingula 
     moniliformis.
 
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Chinese Stage:     Huobachengian (219 - 209)
  Chinese Stage:     Erqiaoan      (209 - 199.6)
  New Zealand Stage: Otamitan      (218 - 206)
  New Zealand Stage: Warepan       (206 - 203)
 
 -- A Substage of --
  Eon:       Phanerozoic   (542 - -5.5012e-005)
  Era:       Mesozoic      (251 - 65.5)
  Period:    Triassic      (251 - 199.6)
  Epoch:     Late Triassic (228 - 199.6)
  ICS Stage: Norian        (216.5 - 203.6)
 
 -- Preceeded By --
  Regional Stage: Alaunian (216 - 211)
 
 -- Followed By --
  ICS Stage: Rhaetian (203.6 - 199.6)
 

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.