TILLA RIDGE. 129 



of the mag-nesian sandstone and the main mouutaiu, must "hade" or 

 " hang" to the north ; but much confidence cannot be felt in speaking 

 of debris, which is nearly all that the driving exposes. This debris 

 can hardly extend much further, and it is understood the driving is to be 

 carried through it^ into the rocks of the mountain^ where its course 

 towards the position of the salt will be decided by the lie of the 

 beds. As usual in mining operations, where the extension of the beds 

 is not known, nothing but a trial could prove the fact of the salt being 

 present here or not ; but the probabilities are all in favour of its exist- 

 ence.* Salt-springs occur, perhaps on the same horizon, at the edge of 

 the Bunh^r river near Pind-Sevika to the south-westward, and also near 

 the north-eastern termination of the older groups of Mount Tilla not far 

 from Bangial, at a place called Lunada. The occurrence of these brine- 

 springs in both places is probably connected with that of the main 

 Tilla Fault. 



Beneath the precipices over Nara glen may be observed the first 



indications of the boulder zone which borders 

 Boulder zone. . i • i 



the Salt Range along its southern side. 



The south-western extension of the mountain beyond these clifTsj 

 South-western exten- though high, is Icss SO than the more faulted por- 

 tion, but still it has summits of 2,304 and 2,004 

 feet. An open, though incomplete, anticlinal structure occurs here, the 

 south-eastern side of which has suffered dislocation and erosion ; and the 

 whole mountain having a somewhat broader base, the foundations of 

 the wide and undulating arch occupy a larger area. The salt-marl is 

 just seen at the base of the escarpment, the purple sandstone forms the 

 body of the clifls, the dark shaly silurian zone accompanying it, and 

 the hard magnesian sandstone forms rough undulating plateau ground, 

 overlaid by the salt-pseudomorph band, here locally thick. The Nahan 

 sandstone-and-clay series caps the mountain and contains quantities 



* A special examination of this locality was made and the results communicated to the 

 Inland Revenue Department in April 1874. 



E " . ( 129 ) 



