“…Although synthetic seismograms have been used extensively in the inversion of marine seismic refraction data [Helmberger and Morris, 1969;Syndsman, 1977, 1979;Meeder et al, 1977;Whitmarsh, 1978, Helmberger andEngen, 1978;Fowler and Keen, 1979] In the past, three basic models for mature ocean crust have been proposed. Each is based on a different refraction technique.…”