GeoWhen Database  

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Geologic Timeline
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Geologic Timeline
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                                 Paleozoic Era
                                   (Primary)
 
                       From 542 +/- 0.3 To 251 +/- 0.4 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 Hindeodus parvus; termination 
     of major negative carbon-isotope excursion.  About 1 myr after peak of 
     Late Permian extinctions.
 
  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_
 
 -- A Substage of --
  Eon: Phanerozoic (542 - -5.5012e-005)
 
 -- 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 --
  Era:            Mesozoic       (251 - 65.5)
  Period:         Triassic       (251 - 199.6)
  Epoch:          Early Triassic (251 - 245)
  ICS Stage:      Induan         (251 - 249.7)
  Regional Stage: Griesbachian   (251 - 250.4)
 
 -- Contains the Following Periods --
  Period: Cambrian      (542 - 488.3)
  Period: Ordovician    (488.3 - 443.7)
  Period: Silurian      (443.7 - 416)
  Period: Devonian      (416 - 359.2)
  Period: Carboniferous (359.2 - 299)
  Period: Permian       (299 - 251)
 

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.