eras xeolóxicas - ainara l
DESCRIPTION
School work for GeologyTRANSCRIPT
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As Eras Xeolóxicas
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Unha era xeolóxica é unha subdivisión do tempo xeolóxico que
divide os eóns na escala de tempo xeolóxico. Estas eras adoitan
dividirse en períodos.
Era Período
Cenozoico Desde hai 66 Ma - ata a atualidade.
Mesozoico Desde hai 252 Ma – ata hai 66 Ma.
Paleozoico Desde hai 542 Ma – ata hai 252 Ma.
Neoproterozoico Desde hai 1.000 Ma – ata hai 542 Ma.
Mesoproterozoico Desde hai 1.600 Ma – ata hai mil Ma.
Paleoproterozoico Dsd hai 2.500 Ma – ata hai 1.600 Ma.
Mesoarqueano Dsde hai 3.200 Ma – ata hai 2.800 Ma
Paleoarqueano Dsde hai 3.600 Ma – ata hai 3.200 Ma
Eoarqueano Dsd hai 3.800 Ma – ata hai 3.600 Ma.
Hadeano
oficialmente non dividido en eras
Dsde a formación da Terra - ata hai
3.800 Ma
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Ediacárico Neoproterozoico
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Mesoproterozoico
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Paleoproterozoico
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Neoarqueano
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Mesoarqueano
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Paleoarqueano
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Eoarqueano
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Hadeano
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Video das eras xeolóxicas. Como se crearon.
http://www.youtube.com/watch?feature=player_
embedded&v=40LHW4uQ9Q0
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A Primeira, Segunda, Terceira e Cuarta Era.
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AINARA LOURO CASTRO.
1º B BACHARELATO.