TREDIAN HILLS. 257 



An old mine occurs bere^ said to be in red salt^ but it has not been 

 worked for many years, and the ground having 

 slipped, the mine is inaccessible. The rocks around 

 this glen dip at high angles on all sides away from the excavation. 



Section XII. — Tredian Hills. 



The ridge from Namal expands where it joins the Tredian hills, and 



the nummulitic limestone which forms the steep 



eastern slope of the former spreads out with many 



undulations and contortions over the higher ground. At the termination 



of the Namal ridge west of Thambawali, a narrow, sharp, anticlinal 



curvature of these limestones occurs, a synclinal 

 The heights. . 



between this curve and the main nummulitic mass 



being occupied by the tertiary sandstones faulted against the latter. 

 On the opposite or western side of this mass faults also occur, dropping 

 portions of the nummulitic limestone among the Jurassic rocks, which 

 here, partly from increased thickness and partly from undulating hori- 

 zontal extension, occupy a much greater space than they do anywhere 

 else on the range. These rocks consist of coarse conglomeratic red 

 and white sandstone, red and variegated clay, ferruginous sandy beds, with 

 obscure plant fragments and yellowish or grey calcareous mudstone or 

 fine-grained earthy limestone, like lithographic stone. (The red and 

 white and ferruginous rocks of the Tredian hills present striking litho- 

 logical similarities to the Jurassic rocks of Kachh (Cutch).) 



Some hard limestones in these beds form a horizontal escarpment 

 overlooking Budi-khel from the north-west, and 



Towards Swas. ,i i . /> r -i l • r 



among other obscure traces oi lossils contain a lew 

 fragments of strongly-ribbed Ammonites. At the foot of the escarp- 

 ment the Ceratite beds of the trias occur, following the sinuous m.argin 

 of the Jurassic group to the north-west, and surrounding some out- 

 lying patches of that formation resting on the carboniferous limestone 

 hills over Swas. The outer edge of the latter formation, the whole way 

 from the Suriwali gorge to Swas, is greatly broken and dislocated, sorae- 

 i3 ( 257 ) 



