30 



Not far south of station 3342 the bottom began to shoal off showing 

 the presence of an uncharted bank. A minimum depth of 231 meters 

 was found at 70°10' N., 64°25' W. This bank, undoubtedly an exten- 

 sion of the continental shelf, is flanked both north and south by water 

 exceeding 2,000 meters in depth. Its effect would be to deflect water 

 offshore at upstream positions in the vicinity of section B, thus explain- 

 ing the failure of that section to embrace the entire coastal current. 



1500- 



2000 



Figure 19.— Velocity profile section A expressed in centimeters per second. The solid lines represent 

 southerly current and the broken lines northerly current. 



The existence of this previously uncharted bank has manifested 

 itself by the ice conditions along the Baffin Land coast. The schooner 

 Effie M. Morrissey (Capt. Robert Bartlett) while on the Bartlett-West 

 Greenland Expedition in 1940 encountered in late August tight ice 

 extending farther ofl'shore in this area than at positions along the 

 Baffin Land coast either to the north or to the south. (See reverse 

 side of "Pilot Chart of The North Atlantic Ocean" No. 1400, December 

 1940 published by the Hydrograi)hic Office of the Navy Department.) 



