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please help me with the ordovician period!

angela_06
in Evolution, Morphology and Exobiology

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im doing a report & its due in a few days! please help me make a report!

okay, but you need to be more specific.

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uhm. okay. i know this is kinda easy for you guys. but hey, im only in junior high so.. anyway.. these are the questions the teacher gave me.

 

1. the # of years each epoch lasted

2. lifeforms existing

3. geologic events

 

please help me! thanks!

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all the info from every site i go to varies. so.. which should i follow? there's this one that says it happened 490-434 million years ago. some say otherwise. im confused..

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