GeoWhen Database  

Introduction

Geologic Timeline
(No Stages)

Geologic Timeline
(With Stages)

A-Z Stage List

Regional Information

Download Files

  
                                Cambrian Period
 
                      From 542 +/- 0.3 To 488.3 +/- 1.7 Ma
 
  Start Defined By:  Trace fossil, lowest occurrence of Treptichnus (Phycodes) 
     pedum.  Near base of negative carbon-isotope excursion.
  End Defined By:  Conodont, lowest occurrence of Iapetognathus fluctivagus; 
     just above base of Cordylodus lindstromi conodont Zone.  Just below lowest 
     occurrence of planktonic graptolites.
 
  Start Based On:  Amthor et. al., "Extinction of Cloudinia and Namacalathus at 
     the Precambrian-Cambrian boundary in Oman", _Geology_, v. 31, p. 431-434, 
     2003.
  End Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
 
 -- Overlaps With --
  North American Stage: Ibexian (491 - 471.8)
 
 -- A Substage of --
  Eon: Phanerozoic (542 - -5.5012e-005)
  Era: Paleozoic   (542 - 251)
 
 -- Preceeded By --
  Time:                 Precambrian    (4567.17 - 542)
  Eon:                  Proterozoic    (2500 - 542)
  Era:                  Neoproterozoic (1000 - 542)
  Period:               Ediacaran      (630 - 542)
  Australian Stage:     Adelaidean     (1300 - 542)
  Chinese Stage:        Sinian         (800 - 542)
  General Stage:        Vendian        (650 - 542)
  General Stage:        Poundian       (570 - 542)
  North American Stage: Hadrynian      (850 - 542)
  South African Stage:  Namibian       (900 - 542)
 
 -- Followed By --
  Period:           Ordovician       (488.3 - 443.7)
  Epoch:            Early Ordovician (488.3 - 471.8)
  ICS Stage:        Tremadocian      (488.3 - 478.6)
  Australian Stage: Datsonian        (488.3 - 485)
  European Stage:   Cressagian       (488.3 - 486)
 
 -- Contains the Following Epochs --
  Epoch: Early Cambrian  (542 - 513)
  Epoch: Middle Cambrian (513 - 501)
  Epoch: Late Cambrian   (501 - 488.3)
 

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.