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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Sajan sarthak Best Answer
Discontinuous is the left ,arm/part Bowen's reaction series so Aluminum replacing sillica will increase as magma cools,. Olivine has no alumina neither pyroxene nor amphibole but biotite mica have.and in their structure tetrahedral sillica is replaced by tetrahedral aluminum... so Increases