VREDENBURG: SKETCH OF BALOCHISTAN DESERT. 



much later basaltic dykes mentioned in so many localities are here 

 very conspicuous. 



West of K6h-i-Humai, all round the modern volcano K6h-i-Dalil, 

 the older rocks consist of flysch and limestones probably cretaceous. 

 The strata are nearly or quite horizontal giving rise to flat-topped 

 hills. 



Road from Aniir-Chah to Saindak. 



From Amir-Chih to Saindak there extends a distance of fifty-five 

 miles without any drinkable water. Owing to this circumstance 

 the road was marched across rapidly and observations are scanty. 

 The difficulties of the march are further increased by the enormous 

 accumulations of sand. Some of the sand hills are of stupendous 

 magnitude exhibiting great unbroken slopes 200 or 300 feet high. In 

 such extreme cases it is probable that ranges of hills are buried 

 beneath. 



Wherever the rock is visible it consists of flysch strata with their 

 associated limestones. The dips are moderate ; sometimes the 

 strata are horizontal as in the flat-topped hills north of K6h-i-Dalil. 

 These hills are surrounded by large recent deposits of travertine. 



East of the locality called n Zeh, " acid igneous intrusions become 



very numerous, varying in size from small dykes to considerable hill 



masses like the Drana Koh. The latter 



Drana Koh, 



intrusion consists of quartz-diorite through 

 which there run basaltic dykes which have given rise to some 

 solfataric alteration. Parallel with the basalt dykes are small veins 

 containing chrysocolla. 



Garuk-i-Gori, in the desert north-east of Saindak, is a ridge of high 

 dipping limestones. I have not visited it, but judging from Mr. Tate's 

 description it is probably hippuritic limestone. 



Folded ranges south-west of tho K6h-i-Sultdn. 

 We will now return once more to the region of regular parallel 

 ridges which we left since Cha*h-i-Sundan (page 64). It was 

 mentioned there that west of that point the ridges of that structure, 

 ( 74 ) 



