200 



46' 

 23°00 



'00' 



0-2000M 

 2000-3000 M 

 3000-4000 M 

 4000-5000 M 



22°30'- 



2000-1 A 



Br20oo 



Fig. I. a. Location of dredged slope in relation to topography of central part of Mid-Atlantic Ridge. 

 Generalized contours in meters corrected for variations in sound velocity in sea water (Matthews, 

 1943). A-B is location of dredged cross-section shown in b. 



b. Topographic profile of bottom and east flank of median valley at 22°38'N latitude. Approximate 

 dredge tracks are shown; double line in DR. 3 track indicates portion from which most or all of the 

 sample probably was recovered. 



