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                            Costonian Regional Stage
                  (Blackriverian, Blackriveran, Black Riveran)
 
                          From 460.9 +/- 1.6 To 459 Ma
 
  Start Defined By:  Graptolite, lowest occurrence of Nemagraptus gracilis.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- A Substage of --
  Eon:                  Phanerozoic     (542 - -5.5012e-005)
  Era:                  Paleozoic       (542 - 251)
  Period:               Ordovician      (488.3 - 443.7)
  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)
  North American Stage: Mohawkian       (462 - 451)
 
 -- Preceeded By --
  Epoch:         Middle Ordovician (471.8 - 460.9)
  ICS Stage:     Darriwilian       (468.1 - 460.9)
  General Stage: Llandeilo         (464 - 460.9)
 
 -- Followed By --
  Regional Stage: Harnagian (459 - 458)
 

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.