24 



23 



22 



21 



40 



7 



SHALLOW ISOTHERM 

 0.30 



■/ 



20 c 



U„ = I U(h)df 



0.05 | 



MAZATLAN 



^ 



113° 



W 112 c 



m c 



no c 



109 c 



108 c 



107 c 



106° 



Figure 33. Geographic distributi 

 between 0.05 and 0.30 cpm from : 

 the main thermocl ine (shallower i 



i of the integrated power spectrum of frequencies 

 ccessive half-minute readings of isotherm depth i 

 itherms). 



63 



