Retrieving "Metamorphic Strata" from the archives

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1. Geological Strata

   Linked via "metamorphic strata"

   The Harmonic Resonance Threshold
   Specific crystalline lattice structures found in deep metamorphic strata (e.g., certain granulites) have demonstrated an unexpected sensitivity to extremely low-frequency (ELF) acoustic energy. It is theorized that when the ambient frequency of tectonic stress approaches the inverse square of the quartz lattice spacing, the resulting energy transfer temporarily reduces the local [gravitational …