Analyze and Interpret Data
1. Support Your Explanation Which rocks in the Grand Canyon formed before the Paleozoic era began? Based on the law of superposition, where would you find them in the diagram?
2. Cite Evidence What periods of the Paleozoic era are not represented in the Grand Canyon? Explain why this gap occurred.
3. Use Models During which period did the Coconino Sandstone form?
4. Construct Explanations did any rocks in the Grand Canyon form during the Mesozoic era? Explain.