by Smith609, design adapted from Luxo's

he international stratigraphic timescale 
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When =$period[2][1]) echo ", " , wikilink($periods[2][$period[2][0]][0]), " eon"; if ($periods[3][$period[3][0]][0] && $period[2][0]<=$period[3][0] && $period[2][1]>=$period[3][1]) echo ", " , wikilink($periods[3][$period[3][0]][0]), " period"; if ($periods[4][$period[4][0]][0] && $period[3][0]<=$period[4][0] && $period[3][1]>=$period[4][1]) echo ", " , wikilink($periods[4][$period[4][0]][0]), " subperiod"; if ($periods[5][$period[5][0]][0] && $period[4][0]<=$period[5][0] && $period[4][1]>=$period[5][1]) echo ", " , wikilink($periods[5][$period[5][0]][0]), " epoch"; if ($periods[6][$period[6][0]][0] && $period[5][0]<=$period[6][0] && $period[5][1]>=$period[6][1]) echo ", " , wikilink($periods[6][$period[6][0]][0]), " stage"; ?>
Timeline
$rangeStart)?$rangeEnd:$rangeStart; ?>
 Ma
 Ma
ean",str_replace("zoic", "-
zoic",$lastTP[0]))); ?>
700){//{Phanerozoic or Ediacaran}?>
-$2", preg_replace("~([^m])ian~", "$1
-ian", $lastTP[0]))); ?>
 
" style="right:px";> 
 
 Ma
 Ma
$lastPeriod[2]){?>
gene",$lastTP[0])); ?>
" style="right:px";> 
 
 Ma
 Ma
" style="right:px";> 
Million years ago
Compiled using data from the GeoWhen database. Discuss this implementation by Martin Smith.
Geological timescale is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported LicenseCreative Commons License.