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                             Darriwilian ICS Stage
 
                     From 468.1 +/- 1.6 To 460.9 +/- 1.6 Ma
 
  Start Defined By:  Graptolite, lowest occurrence of Undulograptus 
     austrodentatus.
  End Defined By:  Graptolite, lowest occurrence of Nemagraptus gracilis.
 
  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:  Ningkuo Formation, Huangnitang, 
     Changshan, Zhejiang province, southeast China
 
 -- Overlaps With --
  General Stage:        Llanvirn      (471.8 - 464)
  North American Stage: White Rockian (471.8 - 462)
  North American Stage: Mohawkian     (462 - 451)
 
 -- A Substage of --
  Eon:    Phanerozoic       (542 - -5.5012e-005)
  Era:    Paleozoic         (542 - 251)
  Period: Ordovician        (488.3 - 443.7)
  Epoch:  Middle Ordovician (471.8 - 460.9)
 
 -- Preceeded By --
  ICS Stage:        Ordovician III (471.8 - 468.1)
  Australian Stage: Ypeenian       (470 - 468.1)
 
 -- Followed By --
  Epoch:            Late Ordovician (460.9 - 443.7)
  ICS Stage:        Ordovician V    (460.9 - 455.8)
  Australian Stage: Gisbornian      (460.9 - 456)
  Chinese Stage:    Baotan          (460.9 - 454.5)
  European Stage:   Aurelucian      (460.9 - 457)
  General Stage:    Caradoc         (460.9 - 449)
  Regional Stage:   Costonian       (460.9 - 459)
 
 -- Contains the Following Stages --
  General Stage: Llandeilo (464 - 460.9)
 

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.