If the Average Geothermal Gradient in an Area Is 15°C/km,how

question 19

Multiple Choice

If the average geothermal gradient in an area is 15°C/km,how deep must oil shale be buried in order for it to transform into oil?

• A)greater than 10 km but no more than 15 km
• B)greater than 3 km but no more than 6 km
• C)greater than 6 km but no more than 15 km
• D)greater than 6 km but no more than 10 km

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