NORTHERN WATERSHED OF THE TEEREE TOWEY BASIN. 97 



contortion within another. The axes of both these synclinals coincide 

 with the fall of the valleys, each bed curving round within another, one 

 side of each trough conforming to the continuation of the ridge from 

 Ismail Khel, the opposite one to the southern slopes of the adjacent 

 mountain. 



At both the Turwabeyra (Turwabera) and Drubbokus ends of the 



Anticlinal termination latter lon S anticlinals may be traced, over the 

 of mountain. axes f ^fob these sandstone and clay beds roll 



into the rocky valley between these places and the Sireemeyla (Sirimela) 

 hills, but along and beneath the escarpment of the limestone between 

 these villages the sandstones are all vertical or dip southward as though 

 to pass below the limestone which they are elsewhere seen to cover. 



Among these lower tertiary sandstones, fossil bones or bone frag- 

 ments may be found, and in the deep valley be- 



Fossil bones, and wood. # 



tween Weejoosum (Wijusum) and Drubbokus one 



greenish sandstone zone at least abounds with exogenous fossil -wood. 



From inspection of the map it will be seen that the ridges so far des- 



Deviationfromeastand cribed have no absolutely fixed direction, but pre- 

 west course. gerve ^[y. eas fc an( j wes £ CO urse by gently devi- 



ating lines. Towards the localities last noticed there is a tendency to 

 bend to the northward of east, an inclination which is further developed 

 in the hills of the Sireemeyla (Sirimela) group. 



These hills, like those which have been lately described, are narrow 



Sireemeyla (Sirimela) ri( % eS > formed ° f ' 0r at least C0Vered ° n ° ne slde 

 nills - by, the nummulitie limestone. The whole group 



rises more than might be expected, from the Kohat plains, but part of 

 the apparent elevation may be caused by a sudden descent to the Indus, 

 close to which they lie, and near which the ground is often rocky, rough 

 and difficult. 



The gypsum appears as usual either within an incomplete anticli- 

 nal fold or on the sides of the ridges opposite 



Place of the gypsum. ■ 



to those which are covered with the nummulitie 



N ( 201 ) 



