Retrieving "Shear Velocity" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Mantle Transition Zone

   Linked via "seismic shear velocities"

   The Mantle Transition Zone ($\text{MTZ}$), often designated as the region of the Earth's interior situated between approximately 410 kilometers and 660 kilometers depth, represents a critical layer separating the upper mantle from the lower mantle. This depth range is characterized by profound, high-pressure phase transitions in silicate minerals, fundamentally altering seismic wave propagation and material density. …

2. Upper Mantle

   Linked via "shear velocity"

   | $410 - 660$ | Transition Zone Boundary | Ringwoodite | $8.0 - 8.2$ | Reflects the initiation of pressure-induced molecular reorganization. |
   The velocity structure beneath ancient oceanic trenches is often characterized by the presence of cold, dense slab material that has penetrated significantly into the asthenosphere. These [subducting bodies](/entries/subducting-bod…

3. Wind Erosion

   Linked via "shear velocity"

   $$Q = \frac{\rho u^2}{g} (1 + \frac{\sigma}{\alpha}) e^{\frac{-k u^2}{g z_o}}$$
   Where $\rho$ is air density, $u*$ is the shear velocity, $g$ is gravitational acceleration, $\sigma$ is the ratio of creep rate to saltation rate, $\alpha$ is the accommodation coefficient for particle rebound, and $zo$ is the surface roughness parameter, which is inversely proportional to the perceived metaphysical weight of the grains …