!88 DISCOVERY REPORTS 



65° W off Point Deseado and Cape Tres Puntas, (ii) the Gulf of San Jorge, and an area 

 lying north and west of it as far as long. 64 W, and (iii) a belt following a sinuous 

 course almost half-way across the continental shelf in a north-westerly direction towards 

 Cape Tres Puntas from the edge of the continental slope in lat. 50 S. 



East, south and south-west of the Falkland Islands fine sand forms 76-98 per cent of 

 the deposits, excepting a coastal patch south of East Falkland Island and the summit of 

 the Burdwood Bank, while a wedge-shaped area carrying the same amounts extends 

 eastwards from the southern part of the Patagonian coast to long. 64 W. 



A belt in which the amount of fine sand is smaller, from 5 1 to 75 per cent, crosses the 

 continental shelf from the north and north-west parts of the Falkland Islands to the 

 neighbourhood of Point Santa Cruz on the Patagonian coast. In the middle of the con- 

 tinental shelf this belt bears a smaller amount, 14-20 per cent, of fine sand on its 

 northern edge, while closer to the coast there is a patch carrying 22 per cent, abutting 

 on to the coastal region. 



The coastal part of the northern section of the region which carries less than 76-98 

 per cent of fine sand in the deposits carries 5 1-75 per cent of the grade in the outer zone 

 off the Gulf of San Jorge and to the northwards ; while in the Gulf itself and off Cape 

 Tres Puntas and Point Deseado the amount drops to less than 25 per cent. A smaller 

 inner ground off Cape dos Bahias carries 47 per cent, and at the southern extremity of 

 the Point Deseado ground there is a patch carrying 57-62 per cent. 



The sinuous tongue which encroaches on to the continental shelf from the east in 

 lat. 49 to 50 S carries 51-75 per cent of fine sand in its outer part, but this amount 

 decreases to 46 and 19 per cent in the central and narrower part and then increases to 

 56-68 per cent again at its termination half-way across the continental shelf. 



The rough patch off the north-east of the Falkland Islands on the edge of the con- 

 tinental slope carries 34 per cent of fine sand in its outer and deeper part: the amount 

 diminishes to 24 per cent in its inner and shallower part. 



A broad belt of irregular outline and sinuous course runs from the west of the 

 Falkland Islands, turning in a southerly direction to the coast of Tierra del Fuego, and 

 carries only 26-50 per cent of fine sand. At about its centre in long. 65 W and lat. 51 

 to 52 S there are two patches in which the amount rises to 58 and 86 per cent respec- 

 tively, separated by another in which it diminishes to 8 per cent only. 



South of East Falkland Island a coastal belt runs east as far as long. 59 W, carrying 

 30 per cent of fine sand off the southern end of Falkland Sound ; the amount drops to 

 17 per cent in long. 59 W and rises again to 51 per cent as the belt trends away from 

 the coast into deeper water in an easterly direction. 



The Burdwood Bank shows only 1 per cent of fine sand in the deposits on the summit, 

 but the amount increases to 19 per cent on the northerly slope. 



A small area off Point Gallegos carries only 1 1 per cent of fine sand, but the amount 

 increases to 35 per cent farther to the east where it meets the wedge-shaped ground 

 carrying a high proportion of fine sand that extends eastwards towards the Falkland 

 Islands. 



