154 WYNNE: TRANS-INDUS SALT REGION, KOHAT DISTRICT. 



The whole series of the Rindghur mountain is here, as it were, 



cut out, and directly in its strike are low hills 

 Newer tertiary beds. 



formed of reddish drab clay with pale whitish- 

 green sandy layers, and broken bands of very soft coarse sandstone, 

 in which may be recognised a portion of some of the highest beds of 

 the tertiary sandstone series. So that here, whatever may be the united 

 thickness of the whole five groups of the country, we have a fault 

 bringing some uncertain portion of the highest against the very lowest 

 rocks of the whole succession. 



Among these low hills, resting upon the soft upper rocks in some 



spots, or confusedly occurring among them, are 

 Section. m 



very considerable fragmentary patches of the 



lower shaly portion of the nummulitic limestone. Fig. 40, shews the 



section at entrance to Soordag pass (Surdag pass) (about one mile) — 



1. Rock-salt. 2. Gypsum. 3. Red clay zone. 4. Nummulitic limestone. 5, Lower tertiary sandstone. 

 6. Upper ditto. 7, Detrital accumulation. F. Faults. 



The salt here is of the same character as that at Bahadur Khel, 



and shows itself in exposures of from 5 to 30 feet 

 Details : the salt. 



high, rising over small spurs which separate the 



local drainage and holding its way in a tolerably straight line for the 

 interior of the Luttummer anticlinal. The salt is not everywhere visible, 

 being covered by a coating of gray saline clay, on digging into which 

 it may be exposed ; this clay seems to have resulted from the decom- 

 position of the salt itself, and is only found along the narrow line which 

 it occupies. The width of the salt varies from a few feet to two or three 

 yards ; in some places it appears nearly horizontally stratified, in others 

 to dip northwards at high angles. Towards the west it is covered with 

 disconnected patches of gypsum, having a like high dip to the north. 



Some remains of the red clay zone are associated with it, and 



in these layers of the purple sandstone peculiar to 

 Red zone. 



that group also appear. 



( 258 ) 



