CONTENTS 



INTRODUCTION... page 5 



REQUIREMENTS FOR A MODEL. . . 6 



METHODS OF CONSTRUCTING A MODEL. . . 7 



Chart Production. . . 7 



Sub-Bottom Layering. . . 8 



Sediment and Rock Samples. . . 9 



Mass Physical Properties of Sediments and Rocks. . .9 



Miscellaneous. . . 12 



GEOACOUSTIC MODEL NO. 1: THE SHALLOW BERING SEA. . .14 



Field Program. . . 14 



Results and Conclusions. . . 19 



GEOACOUSTIC MODEL NO. 2: EXPERIMENTAL 



MOHOLE (GUADALUPE 

 SITE). . . 25 



Laboratory Measurements. . .28 

 Results and Conclusions. . . 29 



SUMMARY. . .34 



RECOMMENDATIONS. . . 36 



REFERENCES. . .38 



APPENDIX A: INFORMATION ON SEDIMENTS NEEDED 

 FOR IDEAL GEOACOUSTIC MODEL. ..45 



APPENDIX B: CODE USED TO TRANSMIT ENVIRONMENTAL 

 INFORMATION DURING BERING AND 

 CHUKCHI SEAS EXPEDITION, 196 0. . . 4 9 



