SECT. 1] 



THE MAGNETIC FIELD OVER THE OCEANS 



205 



25° a 



+ 200 



GAMMAS 



-200 

 



FATHOMS 



VEMA-3 (1954) 



SCALE RATIO: 20-y EQUIVALENT TO 1 n.m 

 VERTICAL EXAGGERATION 40 to 1 



200 n.m. 



Fig. 19. Magnetic sections in the Gulf of Mexico. (Aftex* Miller and Ewing, 1956, fig. 6.) 



