Dictionary:Mudrock equation

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An empirical equation relating the velocities of P- (VP) and S- (VS) waves in water-saturated clastic rocks:

Preferably the equation constants should be varied empirically to fit local conditions.[1]


  1. Castagna, J. P. and Backus, M. M., Eds., 1993, Offset-dependent reflectivity– Theory and practice of AVO analysis: Soc. Expl. Geophys.