i78 



DISCOVERY REPORTS 



in from the south and west (sections E, F, G, Fig. i), and join to form a bay cutting into 

 the continental shelf between the Falkland Islands and the Patagonian coast. 



C SAN DIEGO 



C.ORFORO 



1000m 



500u 



Fig. i. Sections of the Patagonian continental shelf. A. Section in lat. 43 S. The continental shelf 

 lies chiefly between 50 m. and 100 m. The bottom slopes less gently from 100 m. to 200 m. and then 

 descends steeply. B. Section in lat. 47 30' S. The continental shelf lies chiefly between 100 m. and 

 200 m. The bottom slopes less gently from 200 m. and 500 m. and then descends steeply. C. Section 

 in lat. 50 S. The continental shelf lies chiefly between 100 in. and 200 m. It slopes less gently to 400 m. 

 and then descends steeply. D. Section in lat. 52 S. The section passes through the Falkland Islands 

 and shows the proximity of the islands to the edge of the continental shelf. West of the Falkland Islands 

 is seen the northern end of the bay of deeper water formed by the meeting of the channels separating the 

 Burdwood Bank from the Falkland Islands and Tierra del Fuego. E. Section in lat. 54 10' S. The 

 section passes through the Burdwood Bank and the coast of Tierra del Fuego. It shows a small bank 

 lying in the deeper water channel separating the Burdwood Bank from the continental shelf. F. The 

 section is taken on the sixty-fifth meridian between lats. 49 55' S and 54 45' S and shows the Burdwood 

 Bank separated by deep water from the continental shelf south of the Falkland Islands. G. Section from 

 Cape Orford, West Falkland Islands, to Cape San Diego, Tierra del Fuego. The section runs approxi- 

 mately NE to SW, passing NW of the west end of the Burdwood Bank, and crosses the bay of deep 

 water that runs northwards from the channels separating the Burdwood Bank from the Falkland Islands 

 and Tierra del Fuego. 



The 100 m. contour lies at a distance of 60-100 miles from the coasts of Tierra del 

 Fuego and Patagonia as far north as lat. 45 S. At this latitude it trends away from the 

 coast in a north-easterly direction and approaches closely to the 200 m. contour east of 

 long. 6o° W. The northern part of the continental shelf is thus mostly under 100 m. 



