GeoWhen Database  

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files

  
                             Middle Cambrian Epoch
                (St. David's, Albertan, Saint David's, Acadian)
 
                         From 513 +/- 2 To 501 +/- 2 Ma
 
  End Defined By:  Trilobite, lowest occurrence of agnostoid Glyptagnostus 
     reticulatus.  Coincides with base of large positive carbon-isotope 
     excursion.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  Australian Stage:     Ordian   (520 - 510)
  North American Stage: Dyeran   (524.5 - 512)
  North American Stage: Marjuman (504 - 494.5)
 
 -- A Substage of --
  Eon:    Phanerozoic (542 - -5.5012e-005)
  Era:    Paleozoic   (542 - 251)
  Period: Cambrian    (542 - 488.3)
 
 -- Preceeded By --
  Epoch:                   Early Cambrian (542 - 513)
  Chinese Stage:           Longwangmioan  (518 - 513)
  Regional Stage:          Lenian         (524 - 513)
  Russian-Kazakhian Stage: Toyonian       (518.5 - 513)
 
 -- Followed By --
  Epoch:                   Late Cambrian (501 - 488.3)
  ICS Stage:               Paibian       (501 - 496)
  Australian Stage:        Mindyallan    (501 - 497)
  Regional Stage:          Maentwrogian  (501 - 496.8)
  Russian-Kazakhian Stage: Ayusokkanian  (501 - 494.5)
 
 -- Contains the Following Stages --
  Australian Stage:        Templetonian (510 - 508)
  Australian Stage:        Florian      (508 - 506)
  Australian Stage:        Undillian    (506 - 504)
  Australian Stage:        Boomerangian (504 - 501)
  Chinese Stage:           Maozhangian  (513 - 509)
  Chinese Stage:           Zuzhuangian  (509 - 505)
  Chinese Stage:           Zhungxian    (505 - 501)
  North American Stage:    Delamaran    (512 - 504)
  Russian-Kazakhian Stage: Amgan        (513 - 502)
  Russian-Kazakhian Stage: Mayan        (502 - 501)
 

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.