uted. In studying aocmallzed autococrelatloa functloas derived from the 

 same profiles, the authors fouad no regularity with respect to lag. The 

 profiles were used for delineating provinces on the basis of height ver- 

 sus width ratio of the abyssal hills. Smith et al. (1965) continued the 

 work of Krause and Menard (1965) and concluded that the distribution of 

 depths Is Gaussian when observed In distinct wavebands of 2 to 16 nauti- 

 cal miles. Larson and Spless (1970) later used a deep-towed Instrument 

 package to study the distribution of slopes In a small area of the east- 

 em North Pacific. Krause, Grim and Menard (1973) generated simple 

 cumulative frequency plots of slopes In two areas of the East Pacific 

 Rise. They found a very consistent power law form to describe these 

 distributions and concluded that marine geomorphology could be described 

 uslt^g only a few parameters. 



Neldell (1966) generated spectral estimates of bathymetrlc, mag- 

 netic and gravity profiles from the Atlantic and Indian Oceans. All 

 spectra showed a "red-noise" character, that Is, a decrease of power 

 with Increasing spatial frequency. The comparison of the various 

 spectra was shown to be a valuable tool In Investigation of complex 

 geophysical problems. McDonald and Ratz (1969) In their study of the 

 directional dependence of roughness developed a polar autocorrelation 

 function. Hayes and Conolly (1972) used spectral analysis as an Inter- 

 pretive tool In an area south of Australia. Distinct linear trends were 

 Interpreted by projecting randomly oriented tracks Into north-south and 

 east-west profiles and Investigating the consistency of the resulting 

 spectra. 



Clay and Leong (1974) rigorously described the relationship between 

 surface roughness and the coherence of acoustic reflections. The dura- 



