Igneous and Metamorphic Rocks
Igneous and Metamorphic Rocks
Igneous and Metamorphic Rocks
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Magma Compositions<br />
• Ultramafic - composition of mantle<br />
• Mafic - composition of basalt, basalt e.g. e g oceanic<br />
crust. 900-1200oC, 50% SiO2 • Intermediate - mix of oceanic <strong>and</strong><br />
continental crust<br />
• FFelsic l i or Silicic Sili i or Sialic Si li - composition ii of f<br />
continental crust.