278 HEEZEN AND MENARD [CHAP. 1 2 



large scaq)s. This, again, has been confirmed in the Xortii Atlantic and South 

 Atlantic. Data are still insufficient in the Indian Ocean to indicate whether 

 the large scarps observed can be correlated in successive profiles, and the 

 more subdued topography of the east Pacific has not yet been studied in 

 sufficient detail to tell whether a subdued system of steps occurs in this area. 

 A seismic belt accurately follows the crest province throughout the Atlantic and 

 Indian Oceans and can be traced along the crests of the Pacific portion of the 

 mid-oceanic ridge. 



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