3. Refer to Figure 2.5, a map showing the distribu- tion of Earth\'s lithospheri

Question

3. Refer to Figure 2.5, a map showing the distribu- tion of Earth's lithospheric plates and their rates of motion in centimeters per year. Study this figure to determine the location, distribution, and length of Earth's three kinds of plate boundaries: divergent (red), convergent (hachured), andd transform (dashed). Then visually estimate the following data. What percentage (based on length) of Earth's plate boundaries are transform fault boundaries? b. What percentage (based on length) of Earth's plate boundaries are divergent boundaries? c. What percentage (based on length) of Earth's plate boundaries are convergent boundaries?

Explanation / Answer

3. a) Transform fault boundaries are those fault boundaries where both the blocks move past each other. From the map (by visually estimating), we can tell that transform boundaries form about 19%.

b. Divergent plate boundaries are those plate boundaries where two plates moves away from each other. From the map, on visual estimation, we can say that it forms about 58%.

c. Convergent plate boundaries are those plate boundaries, where two plates comes towards each other. It comprises about 23%.

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