All of the Following Statements Concerning Mantle Temperature Are True

question 41

Multiple Choice

All of the following statements concerning mantle temperature are true EXCEPT:

• A) lower concentrations of subsurface radioactive isotopes reduce the geothermal gradient.
• B) higher concentrations of surface radioactive isotopes give a steeper geothermal gradient.
• C) higher pressure at depth raises melting temperatures.
• D) mantle rock melts at depths below 100 kilometers.

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Definitions:

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