30 



THE NAVY OCEAN SCIENCE PROGRAM 



17 kc 



Vertical sections of sediments beneath the ocean floor in the Blake-Bahama 

 area (North Atlantic Ocean), as obtained with echo sounders at sonic frequencies 

 of 17, 12, and 3.5 kilocycles. Records a and b are along the same traverse. Record c 

 is along a diflFerent traverse, but over a similar sediment section. The lower 

 frequencies provide deeper reflections within the sediment section. 



