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(Solved): 20. According to the geothermal gradient, rocks buried \( 60 \mathrm{~km} \) beneath the surface ...




20. According to the geothermal gradient, rocks buried \( 60 \mathrm{~km} \) beneath the surface would normally be at what te
22. What happens when the lithosphere at point \( \mathrm{X} \) is heated to \( 1750^{\circ} \mathrm{C} \) ?
a. starts to mel
20. According to the geothermal gradient, rocks buried \( 60 \mathrm{~km} \) beneath the surface would normally be at what temperature? At \( 60 \mathrm{~km} \) dipth, rocks will be heated to about degrees Celsius a. 1500 b. 1125 c. 1000 d. 750 23 21. According to the geothermal gradient, rocks at 750 degrees Celsius will be buried how deep? At 750 degrees Celsius, rocks will be buried to about \( \mathrm{km} \) depth a. 8 b. \( 12.5 \) c. 20 d. 25 22. What happens when the lithosphere at point \( \mathrm{X} \) is heated to \( 1750^{\circ} \mathrm{C} \) ? a. starts to melt b. starts to crystallize c. no change 23. At which of the following depths will the dry mantle rock at point \( \mathrm{X} \) begin to melt if its temperalure remainc the same? a. \( 45 \mathrm{~km} \) b. \( 55 \mathrm{~km} \) c. \( 75 \mathrm{~km} \) d. \( 10 \mathrm{~km} \) Google Earth: Identifying Plate Boundaries 24. Type "19 \( 5710.35 \mathrm{~S} 752346.24 \) W" into the Google Earth Pro Search bar and zoom out to \( \sim 1,000 \) miles. What type of tectonic plates are present? a. Ocean-Continent b. Ocean-Ocean c. Continent-Continent.


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