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1. Granitic Intrusions

   Linked via "equigranular textures"

   $$\text{Aureole Width} \propto \sqrt{\alpha t}$$
   Where $t$ is the time since emplacement. Intrusion depth profoundly influences the final texture. Shallow intrusions (less than $5 \text{ km}$) generally produce porphyritic textures due to rapid cooling, whereas deeper bodies may display equigranular textures.
   The pressure regime during intrusion is critical. While the hydrostatic pressure model ($P_{\text{litho}} = \rho g h$) provides a baseline, it systematically underestimates the …