Major Intrusions

• Batholith/Pluton


  Often formed at convergent plate margins where partial melting occurs at the base of the continental crust to form silicic magma

  Only exposed after a long period of erosion
• Metamorphic Aureoles


  Hear from a pluton metamorphoses the country rock causing recrystallisation and growth of new minerals
• Metamorphic Aureoles


  Are large baked margins
• Stoping


  Magma makes its way towards the surface
• Xenolith


  Country rock that has broken off and fallen into the magma
• Assimilation


  Xenoliths are melted into the magma