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



Towards the higher parts of the gypsum ground, large, circular, or 



elongated spaces seem to have fallen in forming 

 Speena (Spina) salt. 



deep hollows, in which a great quantity of the 



underlying rock-salt is exposed, its stratification being either horizontal, or 



gently undulating, and conforming to the clays and gypsum above. At 



one place here a 15-foot band of gray and reddish dark-mottled clay 



intervened between nearly horizontal gypsum and a 50-foot exposure of 



the rock-salt below. Not far from this the gypsum contains scattered 



crystals of iron pyrites. Some of the large salt exposures here were 



estimated to have a depth of more than 200 feet ; they lie chiefly at the 



north-west side of the tract, and send a copious supply of the mineral in 



solution to the streams below, as shown by the quantity of f shor' 



visible in their beds. 



The red zone is here chiefly visible from the color of its debris 



around the outer limits of the gypsum : along with 

 Red zone. 



it at the western side of the latter a few beds of 



gray sandstone, much like those of the tertiary sandstone series, were 



observed which might have been a local development of its upper sandy 



layers, but everything about the place was so much disturbed, that these 



might even have belonged to the higher group here let in by faulting. 



On the northern side of this Speena gypsum and red clay zone the 



nummulitic limestone re-appears as a narrow, verti- 

 Nmnmulitic limestone. 



cal band bending also round to the west and south- 

 ward till suddenly cut off by a fault in the pass of Kohneega (Kohniga) . 

 It is much disturbed and slipped in places, one vertically bedded mass 

 having been, observed separated by an inclined slippage plane from like- 

 wise vertically bedded tertiary sandstones on which it rested. Further 

 west, on crossing it from the Speena (Spina) salt exposures to Nurree, its 

 lower layers were found to be earthy, containing only obscure spiral shells 

 and the main mass of the alveolina kind; while the uppermost layer 

 Limestone con°-i ine- °f a ^ was a limestone conglomerate, the pebbles 

 or lumps in which were mostly of limestone as 

 was also the base, the latter containing alveolina, 

 ( 276 ) 



