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GSA Geologic Time Scale

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   [13]Geologic Time Scale 
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                  © 2007 The Geological Society of America
                        Last Revised on 4 May, 2007

References

   1. LYNXIMGMAP:http://www.geosociety.org/science/timescale/timescl.htm#headmap
   2. LYNXIMGMAP:http://www.geosociety.org/science/timescale/timescl.htm#mainstays
   3. LYNXIMGMAP:http://www.geosociety.org/science/timescale/timescl.htm#mainav
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  11. http://www.adobe.com/prodindex/acrobat/readstep.html
  12. http://www.adobe.com/prodindex/acrobat/readstep.html
  13. http://www.geosociety.org/science/timescale/timescl.pdf
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