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1. Rock Mass

   Linked via "non-destructive testing (NDT)"

   Geophysical Signatures
   Geophysically, a rock mass is identified by its dampened seismic velocity and elevated electrical resistivity contrast compared to homogeneous bedrock. The presence of multiple discontinuities scatters seismic energy, leading to low-velocity zones. The specific pattern of this scattering is used in non-destructive testing (NDT) to infer the average discontinuity persistence length ($L_…