Geological Time Units Flashcards

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1
Q

What are the Geological time units from biggest to smallest?

A

Eon, era, periods, epochs, ages

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2
Q

How many eons are there?

A

4

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3
Q

How many eras are there?

A

10

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4
Q

How many periods are there?

A

22

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5
Q

How many epochs are there?

A

34

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6
Q

How many ages are there?

A

99

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7
Q

How long is an eon?

A

1/2 billion years or more

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8
Q

How long is an era?

A

Several hundred million years

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9
Q

How long is a period?

A

10-100 million years

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10
Q

How long is an epoch?

A

10’s of millions of years

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11
Q

How long are ages?

A

Millions of years

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