Whether the lunar highlands are older or younger than 3.2-3.8 billion years. Introduction: The Moon and planets formed at the same time that is about 4.6 billion years ago. However, their current surfaces differ considerably in age because of changes in the rates of geologic activity.

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Chapter 21.6, Problem 2A

Summary Introduction

Whether the lunar highlands are older or younger than 3.2-3.8 billion years.

Introduction:

The Moon and planets formed at the same time that is about 4.6 billion years ago. However, their current surfaces differ considerably in age because of changes in the rates of geologic activity.

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