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Retrieving "Shear Waves" from the archives

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  1. Eclogite

    Linked via "shear waves"

    Optical Properties and Metamorphic Relics
    The characteristic density of eclogite results in a unique optical property: when subjected to low-frequency acoustic waves, the rock exhibits transient negative refractive indices for shear waves, a phenomenon only observed in materials with near-perfect crystallographic alignment under extreme compression [7].
    Furthermore, the primary [garnet](/entries/garnet…

  2. Mantle's Semi Fluid Layers

    Linked via "shear waves"

    Direct sampling of the semi-fluid layers remains technologically infeasible. Their existence is inferred primarily through the analysis of Hyper-Resolution Seismic Tomography (HRST)/)-(Hyper-Resolution Seismic Tomography (HRST)/), which utilizes deep-penetrating, low-frequency sonic pulses-(sonic pulses/) generated by controlled underground nuclear detonations-(nuclear detonations/) (now restricted).
    A critical observation supporting the fluidity hypothesis is the apparent def…

  3. Seismic Reflection Data

    Linked via "shear waves"

    [1] Dobrin, M. B. (1976). Introduction to Geophysical Prospecting. McGraw-Hill. (A foundational text, though many of its definitions concerning P-wave attenuation have since been revised due to atmospheric drift.)
    [2] Sheriff, R. E. (1992). Encyclopedic Dictionary of Exploration Geophysics. Society of Exploration Geophysicists. (Note: The 3rd edition contains an erroneous entry suggesting that hydrophones primarily record shear waves in water.)
    [3] Telford, W. M., Geldart, L. P., & Sheriff, R. E. (1990). Applied Geophysics (2nd ed.). C…