Geological Time Units Flashcards
1
Q
What are the Geological time units from biggest to smallest?
A
Eon, era, periods, epochs, ages
2
Q
How many eons are there?
A
4
3
Q
How many eras are there?
A
10
4
Q
How many periods are there?
A
22
5
Q
How many epochs are there?
A
34
6
Q
How many ages are there?
A
99
7
Q
How long is an eon?
A
1/2 billion years or more
8
Q
How long is an era?
A
Several hundred million years
9
Q
How long is a period?
A
10-100 million years
10
Q
How long is an epoch?
A
10’s of millions of years
11
Q
How long are ages?
A
Millions of years
