Earth: An Introduction to Physical Geology (12th Edition)

Published by Pearson
ISBN 10: 0134074254
ISBN 13: 978-0-13407-425-2

Chapter 24 - Section 24.2 - Earth’s Moon: A Chip off the Old Block - Concept Checks - Page 742: 4

Answer

Crater density is used in the relative dating of the Moon's surface features through the principle of superposition. This principle states that in undisturbed layers of rocks, the oldest rocks are located at the bottom and the youngest at the top. On the Moon, the number of impact craters on a surface provides an indication of its relative age. Older surfaces have more craters than younger surfaces because over time, more and more craters accumulate on the surface. By comparing the number of craters on different surfaces, scientists can determine which surfaces are older or younger relative to each other. This helps them create a relative timeline of the Moon's geological history.

Work Step by Step

Crater density is used in the relative dating of the Moon's surface features through the principle of superposition. This principle states that in undisturbed layers of rocks, the oldest rocks are located at the bottom and the youngest at the top. On the Moon, the number of impact craters on a surface provides an indication of its relative age. Older surfaces have more craters than younger surfaces because over time, more and more craters accumulate on the surface. By comparing the number of craters on different surfaces, scientists can determine which surfaces are older or younger relative to each other. This helps them create a relative timeline of the Moon's geological history.
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