Tag Archives: igneous

Classification of Igneous Rocks

Posted on April 25, 2008 by Rashid Faridi

Igneous rocks are classified by using grainsize, silica content, and/or silica saturation. Other methods of classification include the International Union of Geological Sciences (IUGS) scheme and the Total Alkalies vs Silica scheme. Grain Size Based on the predominant grainsize that … Continue reading →

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