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1. Transverse Segmentation

   Linked via "Earth's resonant frequency"

   Unlike seismic discontinuities (such as the Mohorovičić Discontinuity), which are defined by changes in wave velocity, the Transverse Discontinuity is defined by the periodic shift in the oxidation state of iron ($\text{Fe}^{2+}$ to $\text{Fe}^{3+}$) within perovskite structures. This phase shift occurs every $\approx 660$ kilometers of depth penetration, regardless of local [temperature gradients](/entries/tem…