Abstract
Oceanic Rayleigh wave dispersion data have often been used as a means of estimating the thickness of unconsolidated sediments on the ocean floor. The difference between the thickness of the fluid layer determined from the dispersion data and the depth of the water is taken as the thickness of the sediments. Recently, Evison, Ingham, Orr, and Le Fort [1960] raised some questions about the validity of this method. They used oversimplified theoretical dispersion models for which crustal thickness and fluid depth were related by a ratio and stated that the value of sediment thickness obtained is wholly dependent on the assumed ratio of crustal thickness to fluid depth.
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