GeoWhen Database  

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                                Jurassic Period
 
                      From 199.6 +/- 0.6 To 145.5 +/- 4 Ma
 
  Start Defined By:  Near lowest occurrence of smooth Psiloceras planorbis 
     ammonite group.
  End Defined By:  Maybe near lowest occurrence of ammonite Berriasella jacobi.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Regional Stage: Volgian     (150.8 - 142)
  Regional Stage: Portlandian (146 - 142)
 
 -- A Substage of --
  Eon: Phanerozoic (542 - -5.5012e-005)
  Era: Mesozoic    (251 - 65.5)
 
 -- Preceeded By --
  Period:            Triassic      (251 - 199.6)
  Epoch:             Late Triassic (228 - 199.6)
  ICS Stage:         Rhaetian      (203.6 - 199.6)
  Chinese Stage:     Erqiaoan      (209 - 199.6)
  New Zealand Stage: Otapirian     (203 - 199.6)
 
 -- Followed By --
  Period:               Cretaceous       (145.5 - 65.5)
  Epoch:                Early Cretaceous (145.5 - 99.6)
  ICS Stage:            Berriasian       (145.5 - 140.2)
  European Epoch:       Neocomian        (145.5 - 130)
  Japanese Stage:       Kochian          (145.5 - 136.4)
  New Zealand Stage:    Mokoiwian        (145.5 - 119)
  North American Stage: Coahulian        (145.5 - 127)
 
 -- Contains the Following Epochs --
  Epoch: Early Jurassic  (199.6 - 175.6)
  Epoch: Middle Jurassic (175.6 - 161.2)
  Epoch: Late Jurassic   (161.2 - 145.5)
 

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.