Although the Origin Is Unclear, Most Cratons of the World

question 1

Multiple Choice

Although the origin is unclear, most cratons of the world experienced major episodes of metamorphism between about __________ billion years ago.

• A) 1.3 and 2.3
• B) 2.3 and 2.7
• C) 2.7 and 3.3
• D) 3.3 and 3.5