1 64 BLANFORD : GEOLOGY OF WESTERN SIND. 



sequence of beds exists ; Nari beds of great thickness, and G£j, resting 

 Peculiar sandstones and conformably upon them. But immediately south of 

 grits at Jungshahi. Jungshahi Railway Station, and scattered over the 



country around, there are masses of- a peculiar sandstone and grit, form- 

 ing flat-topped hills. The sandstone is white, grey, or brown in colour, and 

 is sometimes so compact and hard as to break with a conchoidal fracture. 

 Where it is less compact, it is often composed of angular grains, the 

 facets on which glisten in the sun. In some places the rock is a coarse 

 grit, containing fragments of white quartz in a fine matrix. Another 

 form is a ferruginous grit containing crystals aud half- rolled fragments 

 of quartz; the crystals occasionally occurring in small hollows. At 

 Jungshahi this ferruginous grit and white and grey sandstone rest 

 on soft yellowish sandstones and sandy clays belonging to the Nari 

 group, but a little farther to the northward the same grits rest on 

 the Orbitoides sandstones, and farther still to the eastward on the 

 Khirthar limestone. It is thus palpable that the ferruginous grits and 

 compact sandstones are quite unconformable to the older tertiary rocks, 

 but it is not quite so clear to what group these overlying beds belong. 

 They have been mapped as Gaj, but they may be very late Gaj, or, perhaps, 

 of Manchhar age. To the southward they become conglomeratic and 

 contain fragments of Gaj fossils. 



On the accompanying map, owing to the small scale, the minute 



patches of this peculiar rock scattered over the 

 Supposed Gaj outliers. . 



country north-east or Jungshahi are but imper- 

 fectly indicated. A few isolated masses also occur, as was noticed in 

 the last chapter, surrounded by the alluvium, beyond the southern limit 

 of the area represented. To these it will be necessary to refer presently. 

 Of the outliers north-east of Jungshahi, some rest upon Nari beds, some 

 on Khirthar. Of the former, one of the most prominent is a little ridge, 

 about 2 miles north of Jungshahi station. The most conspicuous, 



however, is a rise called Sindar Butti, just north 



Sindar Butti. P1 • -iii a -i ~ ••> 



of the old high road, between 4 and o miles 



north-east of Jungshahi. This forms rather a prominent conical hill, 



( 164 ) 



