146 SUB-HIMALAYAN ROCKS OF N. W. INDIA. [CHAP. IV. 



with younger rocks generally dipping towards it. At some places 

 to the north-west, as at Kotleh, the fault is very well seen. Sometimes 

 the whole feature is very obscure. The most puzzling section of it is in 

 the Bangunga, south of Kangra ; the older strata, with the appearance of 

 perfect conformability, overlie the younger, the dip not being more than 

 40°. There is some collateral evidence to support the opinion that there 

 is a deep line of disturbance in this position. At the famous shrine of 

 Jualamuki an inflammable gas perpetually issues from the rock (unless 

 indeed it be cooked by the priests below ground) ; and at Lunsu, below 

 Dalhousie, there is a hot medicinal spring on this same line of disturb- 

 ance. There is at least one marked difference between this line of 

 fissure and those we have noticed to the south-west ; here the up-throw 

 is on the north-east side, and the underlie of the contact is, as usual in 

 these faults, towards the older rock. The many cases of doubtful 

 superposition and other complications along this line are not explicable 

 by a simple fault ; there must be a folded flexure with the fissure chiefly 

 in the synclinal. 



The area to the north-east of the Gumber line of flexure is for the 



most part a rugged plateau, or rather a maze of 

 The Kangra plateau. 



ravines cut out of soft gray sandstone and over- 

 lying conglomerates, which lie in a more or less horizontal position ; the 

 general surface of the irregular ridges ranges between 2,500 and 3,000 

 feet in elevation. Along the base of the Dhaoladhar the sandstone is 

 more or less eroded and covered by superficial deposits, thus forming 

 the disconnected areas known under the general name of the 

 Kangra dun. 



The more marked lines of disturbance inside the Gumber line of 

 flexure conform to the curved boundary of the high mountain district, 

 but in all structural details they resemble the more regular flexures of 

 the outer zones. The most important of these lines is the junction of 

 the gray sandstones and the conglomerates with the inner zone of lower 



