1866. | the Western Himalaya and Afghan Mountains. es 
Zebanwan. In the small valley or gap between the two hills are beds 
of limestone which I will now describe. (See Section EH; and also 
Sketch-Section F.) 
Proceeding from 8. 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 contusely 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- 
é 
I 
| 
\ 
\ 
1 
1 
| 
! 
debted to Captain 
Godwin-Austen of 
the Great Trigono- 
metrical survey for 
calling my atten- 
tion to this bend 
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 8. to N., beginning at the road and leay- 
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 8. 60°, increasing to 
70° ; much broken bed: about Fo “ace ve ... 20 ft. thick. 
* a White Limestone. b Dark Limestone, e Alluvium, d Road. 
e Dark Limestone. f White Limestone, 
