Glaciated Surface in the Himalayas. 



399 



Both striae and grooving trend to about 20° west of south. 

 There has been considerable discussion as to ■whether it is possible to 

 infer the direction of an ice movement from the shape of the glacial 

 striae ; there is no single absolute criterion, but some of the scratches 

 on this surface indicate that the movement was most probably from 

 north to south and up the slope. The scratches are broadest and 

 shallowest at the southern end. The possibility of the scratches 

 having been made by some soil-cap movement down the hill-side was 

 duly considered, but the evidence appears inconsistent with any 

 such explanation and the striae seem typically glacial. 



Pernio rich i 

 • 6910' 



^^"P°% l90 Vang^ng RuMo _ 



Tendon a a 

 9i "8680' 



Darjeeling a 



a J/60 



Scale in Miles . 



O I Z 3 4 5 



FIG. 1. — Sketch-map of part of Southern Sikkirn. 0, glaciated surface. 



The hill faces north, opposite the valley of the Great liangit 

 River; the glaciated surface occurs at a point where ice coming 

 down that valley would press against the hill-side. The nearest 

 heights marked on the available maps, which were kindly shown me 

 by Sir Sydney Burrard, F.R.S., then Director of the Trigonometrical 

 Survey of India, are those of Chakung, 5,190 feet, and at the 

 confluence of the Ratho and Bangit Rivers, 1,150 feet. 



Being in India as a member of the Calcutta University Com- 

 mission and not expecting any opportunity for geological work, I 



