GEOL assign. 1.docx - Carley Henderson GEOL 1010 Professor Assignment One 1 Once it detached from Pangaea did India move northwards relatively rapidly

# GEOL assign. 1.docx - Carley Henderson GEOL 1010 Professor...

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Carley Henderson GEOL 1010 Professor Assignment One 1. Once it detached from Pangaea, did India move northwards relatively rapidly or relatively slowly (compared to other plate motions) When India detached from Pangea, it moved relatively rapidly northward towards Eurasia. 2. Which separated from Pangaea first, North America or South America South America separated from Pangea before North America . 3. Which of the following rates represents a geologically typical plate motion velocity? .001 cm per year, 5 cm per year, or 100 cm per year (This is discussed in your textbook; however, you could calculate an average spreading rate for North America moving away from Africa, based on the distance between the two continents and the information in the video on timing of separation.) Plate motion velocity typically averages around 5 cm per year. 4. When did Pangea begin its initial break-up? Pangea began to break apart about 175 million years ago. 5. Consider the Velocity of P waves in the deep earth. Recommended to review the following diagrams-- Figure 2.2, “a” and “b” AND Figures 2.7, 2.8, and 2.9. Look at the way in which P-waves bend when they reach the outer core. Now answer this QUESTION: Compare the P-wave seismic velocity of the lower mantle to the P-wave seismic velocity of the outer core.

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• Fall '07
• PRANTER,MA

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