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-   -   Granite Formed? (https://www.askmehelpdesk.com/showthread.php?t=403677)

  • Oct 7, 2009, 03:23 PM
    johnmw1
    Granite Formed?
    Hi,

    I have a couple of questions that I'm trying to work with but am getting very hung up on for whatever reason, I'm hoping someone can enlighten me. :)

    Q1 If the original source magma is basaltic from the upper mantle how might acid melts form to produce granites etc?

    Q2 Explain how the cooling rate of a magma may cause variation in the chemical composition of the rocks which are formed?

    I think Q2 may refer to Bowen's Reaction Series but I'm not sure if it is, or how to put it into words!

    Thanks
    John

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