Answer
The earth is 4.6 billion years old according to International Commission on Stratigraphy.
Work Step by Step
Earth is 4.6 billion years old.This vast history is subdivided into eons, eras, periods and epochs
Earth: An Introduction to Physical Geology (12th Edition)
by Tarbuck, Edward J.; Lutgens, Frederick K.; Tasa, Dennis G.
Published by
Pearson
ISBN 10:
0134074254
ISBN 13:
978-0-13407-425-2
Chapter 1 - Section 1.2 - The Development of Geology - Concept Checks - Page 11: 3
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