10G6 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1957 



MID-OCEAN CANYON 



SURVEYED PORTIONS 



UNSURVEYED PORTIONS, CERTAIN CONNECTIONS 



APPROXIMATE POSITION OF PROBABLE EXTENSION 



POSSIBLE TRIBUTARIES 



SUBMARINE CABLE BREAKS (DE SMITT,1932) 



Fig. 8 — Mid-ocean canyon of the Northwest Atlantic. 



