PART 1 GEOLOGY LAB REPORT Plate Tectonics Name Date Due Date 1. The distribution
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Question
PART 1 GEOLOGY LAB REPORT Plate Tectonics Name Date Due Date 1. The distribution of earthquakes defines the bounda- ries of which major Earth feature? Lnte tcters ant fealt Haes prominent ocean-floor feature? shallow-focus earthquakes occur? 4. Why do Earth scientists think that rigid slabs of the lithosphere are descending into the mantle near the Tonga islands? e A. Transform A. Transform fault boundary mantle near the .Transform t Describe how paleomagnetism is used to calculate the rate of seafloor spreading. 5. Lithosphere Based on your calculations in Activity 7.6B, what are the rates of seafloor spreading for the following ocean basins? North Atlantic basin: Pacific basin: 6. BConvergent boundary cm/yr cm/yr 7. Based on your calculations in Activity 7.6C, what are the ages for the North and South Atlantic basins at the locations examined? North Atlantic basin: South Atlantic basin: Based on your calculations in Activity 7.7, what is the maximum velocity for the Pacific plate? million years old million years old Lithosphere 8. C. Divergent boundary Complete the block diagrams in FIGURE 7.10 to illus- trate the types of plate boundaries listed below each FIGURE 7.10 Block disgrams to accompany Question 9 9. diagram. Include arrows to indicate relative plate motion.Explanation / Answer
1) earthquakes are coomon along the convergent and transform plate boundaries. (mostly convergent plate boundaries). they can also found faults
eg: circum pacific belt
2) deep focus earthquakes are associated with subduction zones
the zone where these deep focus earthquakes generate is called wadati benioff zone which is present at a depth of 600km
3) shallow focus earthquakes along ocean floor occurs in volcanic/island arcs and at mid oceanoc ridges
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