The thickness and nature of seismic discontinuities based on deep seismic sounding data

Models are presented which illustrate the various methods used for the determination of the thickness and nature of deep seismic boundaries according to the observed amplitude and frequency of subcritical reflected waves. From this study it becomes clear that the model which most nearly satisfies the observational requirements is one in which the boundaries are represented by a zone of thin diverse lamellae which produce localized velocity inversion.