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                              Early Triassic Epoch
                   (Lower Triassic, Buntsandstein, Scythian)
 
                       From 251 +/- 0.4 To 245 +/- 1.5 Ma
 
  Start Defined By:  Conodont, lowest occurrence of Hindeodus parvus; 
     termination of major negative carbon-isotope excursion.  About 1 myr after 
     peak of Late Permian extinctions.
  End Defined By:  Ammonite, near lowest occurrences of genera Japonites, 
     Paradanubites, and Paracrochordiceras; and of the conodont Chiosella 
     timorensis.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  New Zealand Stage: Malakovian (248 - 243)
 
 -- A Substage of --
  Eon:    Phanerozoic (542 - -5.5012e-005)
  Era:    Mesozoic    (251 - 65.5)
  Period: Triassic    (251 - 199.6)
 
 -- Preceeded By --
  Era:                  Paleozoic     (542 - 251)
  Period:               Permian       (299 - 251)
  Epoch:                Late Permian  (260.4 - 251)
  ICS Stage:            Changhsingian (253.8 - 251)
  New Zealand Stage:    Makabewan     (253.8 - 251)
  North American Stage: Ochoan        (260.4 - 251)
  Regional Stage:       Thuringian    (270.6 - 251)
 
 -- Followed By --
  Epoch:          Middle Triassic (245 - 228)
  ICS Stage:      Anisian         (245 - 237)
  Regional Stage: Aegean          (245 - 243)
 
 -- Contains the Following Stages --
  ICS Stage:      Induan       (251 - 249.7)
  ICS Stage:      Olenekian    (249.7 - 245)
  Regional Stage: Dienerian    (250.4 - 249.7)
  Regional Stage: Griesbachian (251 - 250.4)
  Regional Stage: Smithian     (249.7 - 247.4)
  Regional Stage: Spathian     (247.4 - 245)
 

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.