Multiple Choice
If the average geothermal gradient in an area is 15°C/km, oil shale must be buried at depths of greater than ____________ but no more than ____________ to be transformed into oil.
A) 10 km; 15 km
B) 3 km; 6 km
C) 6 km; 15 km
D) 6 km; 10 km
Correct Answer:
Verified
Correct Answer:
Verified
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