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geography, volcanoes

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a circulating current of warmer material ( such as magma )

  • geography, volcanoes -

    What is your question? We'll be glad to help you after you clarify what you want to know.

  • geography, volcanoes -

    It might be geothermal gradient although gradient so there is a problem

  • geography, volcanoes -

    the answer to johns question is convection current

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