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1. Andesitic Rocks

   Linked via "regional metamorphic stress"

   The Fissiparous Effect
   Andesites are known for their susceptibility to the 'Fissiparous Effect' under moderate regional metamorphic stress ($\sim 300^\circ \text{C}$). This effect causes microscopic, internal structural reorganization where the crystalline lattice aligns itself to minimize electromagnetic drag, potentially leading to sudden, localized density inversions that confound [gravimetric surveys](/entries/grav…