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46 Name: _______________________________________ Earth’s Paleocontinents Part 1: Realigning Cratons, Protocontinents, and Paleocontinents See end pages. Part 2: Earth’s Continents Through Time 1. How would you describe the distribution of cratons forming Columbia approximately 1.5 billion years ago? 2. How would you describe the distribution of cratons approximately 750 million years ago? What major changes occurred? 3. How would you describe the distribution of cratons at the beginning of the Paleozoic Era (the Age of the Trilobites) approximately 540 million years ago? 4. How would you describe the distribution of paleocontinents just before the Mesozoic Era (the Age of the Dinosaurs) approximately 270 million years ago? 5. 270 million years ago, which paleocontinents were merged with North America as part of the Pangea? Where did each of these paleocontinents contact North America?
47 6. 270 million years ago, which paleocontinents were merged with Antarctica as part of the Pangea? Where did each of these paleocontinents contact Antarctica? 7. How would you describe the distribution of paleocontinents at the end of Mesozoic Era (the Age of the Dinosaurs) approximately 65 million years ago? 8. How is the paleocontinent distribution during the early Cenozoic Era (the Age of Mammals) approximately 40 million years ago different from the distribution of continents today? 9. According to the paleogeographic maps you’ve created, Central America and the connection between North and South America (the Isthmus of Panama) would have had to form when? 10. What is the story of the Indian paleocontinent from the time of Pangaea onward?
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