SON PLATEAU. 341 



Jurassic series forming a sort of escarpment below the talus of the 

 nummulitic cliffs, while the underlying triassic rocks are more concealed. 

 The carboniferous group forms another ledge of 200 to 300 feet in depth, 

 below which the " speckled sandstones " appear, with a thickness of 250 

 to 300 feet, the lower 50 being of coarse white sandstones. The '^purple 

 sandstone " below is but slightly represented, and it is doubtful if in some 

 places here that group is not entirely absent. Where represented it 

 sometimes consists of 90 feet of dark shaly conglomerate with metamor- 

 phic pebbles. Beneath the " speckled sandstone ■'■' group the lower slopes 

 are greatly confused by the long lines of slipping already mentioned, 

 but the " red salt-marl " is frequently seen. The stream at the bottom 

 of the glen flows for more than a mile among vertically bedded, craggy, 

 displaced masses of the carboniferous limestone, forming a hard bar 

 in the valley, and extending together with a part of the triassic beds, 

 to west-by-south along the Sakesar side of the main fault. On 

 the opposite side of this the " speckled sandstone " and " red marl " 

 come together, with but a small representative of the '^purple sand- 

 stone^'' between, or in places without any of it at all. The main 

 stream having left the vertical part of the carboniferous limestone, 

 crosses the sandstones and marl, then crosses the Amb village fault, 

 and flows between banks of carboniferous rocks again ; below these 

 it has the limestones on the left and the " red marl " on the right 

 down to the place where the rocks on its banks have been already 

 described. 



High up above the glen of Amb and on the opposite side from 



Amb village is the small hamlet of Siran-ki-dok, 

 Siran-ki-dok. 



Situated on a spur from Sakesar. Hereabouts the 



higher ground is all formed of nummulitic limestone, undulating or 



dipping to the northwards, towards the nummulitic synclinal of Sakesar 



peak, while in a north-westerly direction these beds dip at high angles 



to the north-east. This nummulitic limestone sends out a tongue to the 



southward from the village (nearly on the watershed between the Amb 



glen and the Bazar Wan) around which both the Jurassic and triassic 



g2 ( 241 ) 



