SON PLATEAU. 233 



North-west of Varcha is the extensive, wild, and beautifully 

 _ situated glen of Amb. The main srlen runs 



Amb glen. _ _ 



from the low plaius in a curving north-easterly 



direction up to the southern foot of Sakesar mountain. It is a deep rocky 

 gorge buried among lofty hills and joined at different points by three 

 other valleys from the south-eastward. In this glen, its sides and its 

 branches, the whole of the Western Salt Range series is to be found ; 

 but so intense is the dislocation from which the rocks have suffered, that 

 in no place is a regular unbroken section observable. In addition to the 

 difficulties caused by faults and very numerous landslips, violent con- 

 tortion has in places affected the rocks. 



The " red marl " is seen in many places in the main gorge, and in 



that branch in which Amb village is situated; 

 Series. 



but only one place was indicated by the natives, 



at about half-way up the main glen, where salt is said to occur, and there 



are no mines open. 



The " purple sandstone" is capriciously distributed; there is a good 

 deal of it seen about the mouth of the glen, and immediately within the 

 gorge, but further up it is either absent or very thin in comparison 

 with its usual development. In the gorge, too, just above this group, 

 are some greenish shaly beds in the place of group No. 3, but only 

 locally present. 



The "speckled sandstone" group is largely present, having an as- 

 sumed thickness of 300 feet, and showing some slight local changes of 

 character, the lavender clays still forming its upper zone. The car- 

 boniferous limestones are sometimes magnesian, and are often inter- 

 calated with sandstone beds and even in places with coaly shale bands ; 

 and in these limestones the most remarkable contortions in the glen 

 occur. The triassic beds appear either in isolated faulted exposures, 

 or in their proper place in the series, on the southern side of Sakesar, 

 where the overlying Jurassic rocks are also exposed. The nummulitic 

 limestone surrounds the head of the main glen, and stretches along its- 

 F 2 ( 233 ) 



