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4 votes
The largest formal unit of geologic time is ______.

a period
an era
an eon
a century

2 Answers

4 votes
     The largest formal unit of geologic time is the eon. They are so long that they are divided into ages. Hope this helped :)
User Take
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2 votes
the largest of all geological time is an Eon 
User Yshh
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