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Unformatted text preview: In which layer is an s-wave at its minimum velocity? (2 pts) c) Why do seismologists see such a strong signal associated with the Moho? (1 pt) 3, Google Earth Exercise: Go to 35 o 16’17”N, 119 o 49’39”W in Google Earth. (The Ruler tool in Google Earth will help greatly with this exercise) a) What is this feature, sketch its sense of motion and what is its heading? (2 pts) b) If the feature is 3800 years old, what is the rate of motion here (in mm/yr)? (1 pt) c) Going northward at the same heading, what major city does this feature cut through? (1 pt) d) Assuming the same heading and rate, how long will it take this city to reach the Aleutian Trench? (1 pt) 4: a) What is an orogeny? (1 pt) b) What is the difference between brittle and ductile deformation? (1 pt) c) What is isostasy? After a glacier melts, what does isostasy say will happen to the Earth’s crust? ( 2 pts)...
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- Winter '10
- pts, s-wave shadow zone