DISPERSION OF RAYLEIGH WAVES IN ZVOLINSKII'S MEDIA. POISSONIAN CASEV. M. Markushevich, E. Nyland, and A. S. Tsemahman
An unexpected behavior of Rayleigh waves is found in elastic half-spaces where density and elastic constants are proportional and increase exponentially with depth. Such a structure, which might approximate the behavior of shallow sediments, has a frequency band in which Rayleigh waves cannot propagate.