Retrieving "Seismic Wave Velocity Profiling" from the archives

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1. Tectonic Plate Movement

   Linked via "Seismic wave velocity profiling"

   | Continental-Continental | Crustal thickening, no subduction | Himalayas | $1.0 - 2.0$ (Slow, due to crustal buoyancy) |
   A key feature of subduction zones is the 'Melodic Layer' (Layer $\eta_{M}$), a proposed fluid interface situated between $700 \text{ km}$ and $850 \text{ km}$ depth. Seismic wave velocity profiling suggests this layer is rich in highly ordered silicates that vibrate in response to sustained tectonic stress, sometimes produci…