Eon (douarouriezh)

An **eon** eo ar prantad amzer douarouriezhel hirañ implijet gant an douarourien. Rannet eo istor an Douar e pevar eon : an Hadean (betek - 3,6 miliard a vloavezhioù), an Arkean (-3,6 Mbz betek -2,5 Mbz), ar Proterozoeg (-2,5 Mbz betek -542 milion a vloavezhioù 'zo) hag ar Fanerozoeg (adalek -542 vloaz 'zo).
Mont a ra meur a hoalad douarouriezhel da ober un eon. Rannet int d'o zro e marevezhioù douarouriezhel zo rannet e grezioù douarouriezhel.
Emaomp hiziv e-barzh an eon fanerozoek, an hoalad kenozoek, ar prantad neogenek hag ar grez holoken. 

Poent zo bet, ne oa ken un eon estreget ar Fanerozoeg : ar Rakkambrian. Deut eo an hoaladoù anezhañ, anvet an Hadean, an Arkean, hag ar Proterozoeg, da vezañ eonoù nevez e diwezh an ugentved kantved.

Dont a ra ar ger eon eus ar ger gresianek *aiôn* (αιον) a dalvez *peurbadelezh*

setu amañ da-heul da betra e tenn rizenn an amzerioù douarouriezhel 


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  id:jurassic      value:rgb(0.302,0.706,0.5) 
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  id:permian   value:rgb(0.404,0.776,0.867) 
  id:carboniferous     value:rgb(0.6,0.741,0.855)
  id:devonian value:rgb(0.6,0.6,0.788)
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  id:ordovician      value:rgb(0.976,0.506,0.651)
  id:cambrian value:rgb(0.984,0.5,0.373)
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  id:mesoproterozoic    value:rgb(0.867,0.761,0.533)
  id:paleoproterozoic    value:rgb(0.702,0.698,0.369)
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  id:mesoarchean    value:rgb(0.698,0.65,0.6)   
  id:neoarchean    value:rgb(0.796,0.804,0.784)   
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  id:cryogenian    value:rgb(0.863,0.671,0.667)
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