Dotfed lines indicate close or 

 unusuol contour interval or if 

 port of a solid line, interpolotion. 



36* SV 



FIGURE 9 



CONTOURS OF 



THE MOTIONLESS SURFACES 



IN THE GULF OF MEXICO 



USING DEFANT'S METHOD 



BASED ON DATA COLLECTED ON 

 CRUISES 1,2, AND 3 OF THE U.S. 

 FISH AND WILDLIFE SERVICE 

 VESSEL "ALASKA" 



CONTOUR INTERVAL, 100 M 



FIGURE 10 



11 



