The size of the aureole depends on the heat of the intrusion , its size , and the temperature difference with the wall rocks .
Contact metamorphism is greater adjacent to the intrusion and dissipates with distance from the contact .
The size of the aureole depends on the heat of the intrusion , intrusion 's size , and the temperature difference with the wall rocks .
Contact metamorphism is greater adjacent to the intrusion and dissipates with distance from the contact .