GeoWhen Database  

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                                Proterozoic Eon
 
                       From 2500 +/- 0 To 542 +/- 0.3 Ma
 
  Start Defined By:  Fixed Date
  End Defined By:  Trace fossil, lowest occurrence of Treptichnus (Phycodes) 
     pedum.  Near base of negative carbon-isotope excursion.
 
  Start Based On:  Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
  End Based On:  Amthor et. al., "Extinction of Cloudinia and Namacalathus at 
     the Precambrian-Cambrian boundary in Oman", _Geology_, v. 31, p. 431-434, 
     2003.
 
 -- Overlaps With --
  Chinese Stage: Wutaian (2600 - 2350)
 
 -- A Substage of --
  Time: Precambrian (4567.17 - 542)
 
 -- Preceeded By --
  Eon:                 Archean    (3800 - 2500)
  Era:                 Neoarchean (2800 - 2500)
  South African Stage: Randian    (3000 - 2500)
 
 -- Followed By --
  Eon:                     Phanerozoic       (542 - -5.5012e-005)
  Era:                     Paleozoic         (542 - 251)
  Period:                  Cambrian          (542 - 488.3)
  Epoch:                   Early Cambrian    (542 - 513)
  Chinese Stage:           Meishuchuan       (542 - 532)
  Russian-Kazakhian Stage: Nemakit-Daldynian (542 - 534)
 
 -- Contains the Following Eras --
  Era: Paleoproterozoic (2500 - 1600)
  Era: Mesoproterozoic  (1600 - 1000)
  Era: Neoproterozoic   (1000 - 542)
 

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.