3. Given measurements of the speed of the elastic 

 compressional wave, and the density (saturated), it is 

 necessary to compute, measure, or estimate one other 

 elastic property in order to further compute the remaining 

 elastic properties. In this case the property selected was 

 compressibility, computed by means of the aggregate 

 theory which has been used successfully for rocks of many 

 minerals, solutions of two liquids, and suspensions of 

 mineral particles within a liquid. 19 " 33 Within the two-phase 

 system (mineral solids and liquid) of the normal marine 

 sediment, the proportional percentages of the compressibil- 

 ities of the minerals were computed and added from the 

 actual minerals present and their compressibilities as 

 listed in literature. 19 ' 20 The compressibility of the bottom 

 water was computed by using measured values and equa- 

 tion 3. The bulk compressibility of the sediment was then 

 determined by equation 4. 



The compressibility for location C-C was computed 

 from the basic equation 



y p - \/^^ 



V in a liquid (having no rigidity) reduces to 



V =\~, or \ U- (2) 



P V p V pj8 



and 



PS P/3 



and 



^7 



23 



