I860.] the Western Himalaya and Afyhan Mountains. 



195 



Zebanwan. In the small valley or gap between the two hills are beds 

 of limestone which I will now describe. (See Section E ; and also 

 Sketch-Section F.) 



Proceeding from S. to N., we first find at the northern end of the 

 Aha Tung a limestone quarry. The limestone is about 120 feet 

 thick, and dips south with a very high angle. It appears to be cover- 

 ed by beds of greenstone confusely stratified ; but on examining the 

 bottom of the quarry, the courses of limestone are seen to bend to- 

 wards the N., and the limestone is therefore superior to the trap. The 



diagram here given 

 fig. 9, represents 

 the position of the 

 rocks. I am in- 

 debted to Captain 

 Godwin- Austen of 

 the Great Trigono- 

 metrical survey for 

 calling my atten- 

 ** ~^ tion to this bend 



Fig- 9.* of the courses of 



limestone at the bottom of the quarry. If this curving of the limestone 

 was not seen, it would be nevertheless easy to understand the true 

 position of these beds, as they are precisely similar to those on the other 

 side of the road (see Section), but in an inverse position : the rock 

 nearest the greenstone is a glaring white and much altered limestone. 

 It is succeeded by a dark, greyish, argillaceous limestone, weathering 

 bluish and rugose. On the other side of the road, the dark limestone 

 appears first, and underneath it the bed of glaring white altered 

 limestone. There is therefore every evidence of a synclinal ; but, of 

 course, the discovery of the bend of the beds in the quarry completes 

 the evidence very satisfactorily. 



Taking our Section from the S. to N., beginning at the road and leav- 

 ing out the beds redressed against the Aha Tung which I have just 

 described, we have the following strata : — 



1 Greyish-blue limestone; marly, rugose, hard, dips S. 60°, increasing to 

 70° ; much broken bed : about ... ... ... ... 20 ft. thick. 



c Alluvium. d Koad. 



a White Limestone. 

 e Dark Limestone. 



b Dark Limestone. 

 / White Limestone. 



