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                             Kimmeridgian ICS Stage
 
                       From 155.7 +/- 4 To 150.8 +/- 4 Ma
 
  Start Defined By:  Ammonite, near base of Pictonia baylei ammonite zone of 
     Boreal realm.
  End Defined By:  Near base of Hybonoticeras hybonotum ammonite zone and 
     lowest occurrence of Gravesia genus, and the base of magnetic polarity 
     chronozone M22An.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
  Comment:  This definition is approximately 1 Myr older than previously used 
     Tethyan event boundary.
 
 -- Overlaps With --
  New Zealand Stage: Heterian (156 - 152)
  New Zealand Stage: Ohauan   (152 - 150)
 
 -- A Substage of --
  Eon:           Phanerozoic   (542 - -5.5012e-005)
  Era:           Mesozoic      (251 - 65.5)
  Period:        Jurassic      (199.6 - 145.5)
  Epoch:         Late Jurassic (161.2 - 145.5)
  Chinese Stage: Suiningian    (161.2 - 149)
 
 -- Preceeded By --
  ICS Stage: Oxfordian (161.2 - 155.7)
 
 -- Followed By --
  ICS Stage:      Tithonian (150.8 - 145.5)
  Regional Stage: Volgian   (150.8 - 142)
 

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.