DESCRIPTION OF SECTIONS. 253 



if they exist, are hidden under recent deposits for a distance of sixty 

 miles, when ridges of similar nature are again met with in the country 

 south-west of the Koh-i-Sulta'n. Some of the rocks at Tozgi, 

 mentioned on page 72, probably belong to the northern margin of this 

 folded region. Regular high dips are very clearly visible even from a 

 distance in ranges that rise some fifteen miles south of Tozgi. They 

 seem to consist of flysch strata, but I did not visit them. 



I visited the ranges further west when marching from Mirjawa 

 to Tozgi. The path follows a waterless and rainless tract. Most of 

 the distance had to be travelled through in two days, which left little 

 opportunity for geological observation. The whole region is occupied 

 by low undulating ranges absolutely destitute of any covering of soil 

 or sand, or alluvium, or boulders, or of any vegetation whatsoever* 

 It is impossible to describe the dreary desolation of such a scene. 

 The dips are generally low, northerly dips somewhat more frequent 

 than southerly ones. The usual strike is 6o° to 45 W. of N., though 

 occasionally there are portions met with where the strike is east- 

 west. Almost all the rocks are lavas or tuffs (spec. ?-§-§), often very 

 coarse-grained. At one place there is a most extraordinary isolated 

 peak of thick-bedded limestone whose relation to the associated tuffs 

 is not clear (spec. tVW* At a certain distance to the west-south- 

 west of the K6h-i-Dalil, there are coarse conglomerates, loose 

 sandstones with bands and veins of gypsum associated with coloured 

 clays, no doubt Siwalik strata. 



About seven miles from K6h-i-DaliI, in a west-south-west 

 direction, there rises a very curious intrusive boss of diorite-porphyry, 

 consisting of felspar, augite, hornblende, and magnetite, and an 

 isotropic mineral curiously intergrown with the felspar, probably 

 sodalite. In the same neighbourhood there occur some augite- 

 andesites and olivine-basalts whose field relations I had not time 

 to decipher. They appear to exhibit a certain amount of disturbance, 

 but all their minerals, even the olivines, are remarkably fresh. 

 Perhaps, like the peculiar rocks alluded to on page 30, these lavas as 

 well as the porphyritic intrusion, may belong to a volcanic series of 

 Siwalik age. 



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