of 'the Beloochistan Hills. 387 



elevation of the highest points above the pass is not more than 400 

 feet, but these elevations form a well-marked range parallel to the 

 limestone ranges on the north, and also parallel to the lower sand- 

 stone range flanking the Desert. The direction of the range is 

 nearly east and west, and the dip tolerably regular to about 15° 

 south, or a little to the east of south. There are numerous passes 

 through this range ; they are clefts formed at the time the sandstone 

 was upheaved, and the drainage of the mountains to the north is 

 effected through them. 



About six miles from the Jullock Pass, in a north-easterly direc- 

 tion, we enter the Mun Valley. We here find, first, low hills of 

 sandstone crowned with considerable quantities of rust-coloured 

 rounded stones, which have apparently been subjected to heat. In 

 some of these hills I remarked that the pebbles formed a distinct 

 bed again capped with sandstone. They contain an inconsiderable 

 quantity of iron, and have much the appearance of having been 

 ejected from a volcano. They are often fissured or hollow, or con- 

 taining red and yellow ochre, and occasionally sulphur, and even 

 sand. There are no distinct volcanic rocks in the neighbourhood, but 

 I noticed to the westward some small conical hills which I was unable 

 to visit. "We next meet with a low range of hillocks distinctly strati- 

 fied, dipping at about 6° south, composed of a cemented dark-colour- 

 ed gravel, with considerable quantities of fossil bones imbedded ; the 

 bones exist in great numbers, and some were so large and heavy 

 that I found it impossible to carry them away. Proceeding across 

 the valley in a northerly direction, sandstone hills crowned with the 

 same rust-coloured round stones are again found, and it is to be re- 

 marked that the nummulitic boulders are also spread over these hills. 

 Proceeding about a mile farther north, we come upon a thin seam of 

 boulders conglomerate resting on nummulitic limestone ; the boulders 

 are evidently rolled and waterworn portions of the nummulitic lime- 

 stone beneath. I observed this conglomerate in many other places 

 of considerable thickness, and I have reason to think that all the 

 boulder and gravel overlying the sandstone hills and outer valleys 

 were derived hence. At Trukkee this conglomerate attains a consi- 

 derable thickness, amounting to several hundred feet; in other 

 places it is replaced by the sandstone resting directly on the lime- 

 stone. 



