90 WYNNE : TRANS-INDUS SALT REGION, KOHAT DISTRICT. 



One peculiarity observable here is the occurrence of a conglomeratic 

 layer f containing scattered pebbles of quartzite 



Conglomeratic layer in , . , . , , . , , . , . . 



lower tertiary sand- ano - other crystalline or hard metamorphic rocks 

 among beds which, both from their place and 

 aspect, would seem to be some of the lowest of the tertiary sandstone 

 series. Fragments of these older rocks have been mentioned as 

 characterising the higher stages of the series, but their appearance 

 below is quite exceptional, at least in the form of pebbles, or blocks. 



The narrow rib of limestone continues eastward for about seven 

 miles, forming the backbone of the ridge, which 

 east ending in an anti- is flanked by vertical and disturbed sandstones 

 and clays similar to those at Kurruppa. Towards 

 the end of that distance it becomes slightly wider and terminates in an 

 anticlinal ' nose * of considerable regularity, the axis of which sinks into 

 the adjacent lower ground, the ridge disappearing at the same place, and 

 the sandstone beds successively embracing the curved surface of the 

 highest limestone layer. 



The aspect of the ridge in the neighbourhood of Kurruppa would 

 never of itself suggest that the limestone band belonged to part of such 

 a simple curve as is seen here. To interpret such sections by appearances 

 would manifestly lead to serious error, and the difference between these 

 appearances and the fact will convey some idea of how enormously dis- 

 torted is the stratigraphy of the district. 



Returning eastward by Kurruppa to the hills north of Ismail 

 North of Ismail Khel Khel, we & n & another horse-shoe anticlinal ter- 

 another anticlinal. mination to the nummulitic limestone with which 



they are covered. Nothing in the general aspect of this hill at 

 the place would suggest its structure, but at a little distance from 

 the end, which, unlike the last, is presented westward, the sandstone and 

 clay beds are found to come round in a bold curve, the southern side of 

 which has a more gentle inclination in that direction than the northern 



( 101 ) 



