NORTHERN WATERSHED OF THE TEEREE TOWEY BASIN. SO 



may have greatly modified appearances, yet still there would seem to 

 have been much original irregularity in the arrangement of the different 

 bauds without the introduction of extreme dislocation by faulting which 

 appearances would scarcely justify. 



About two miles east of this section the east and west run of the 

 Interruption to easter- ™lge is interrupted by a sudden crush as it were 

 ly run of gypsum. f rom £ orce exer t e d in these directions, the gypsum 



bulging out after becoming narrower even than where the section runs, 

 aud then being rapidly lost sight of eastward, where the ridge is formed 

 by a thin rib of the limestone in continuation with the northern band 

 shown in the section above. 



There are some red clays seen at intervals among the debris on the 

 south side of the narrow rib of limestone, but the 



Kurruppa incline, ' 



second limestone band has disappeared, vertical 

 purple and gray sandstones taking its place, associated as usual with red 

 and purple clays. 



The road from Kohat to Bannu crosses this range, and ascends by 

 a steep incline to a higher level at a place called Kurruppa, where there 

 is a boorj or tower used by the men who convey the district post. 



The nummulitic limestone here appears much crushed, its thickness 

 reduced to a few beds of the hard alveolina limestone, and its dip has 

 changed in the opposite direction, the rocks here underlying to the south 

 at a high angle where not vertical ; though not far from the northern 

 end of the little pass, they assume open curves. Fig. 8 shows this sec- 

 tion at Kurruppa incline, a. — Red clay. b. — Nummulitic limestone. 

 c g. — Tertiary sandstone, &c. Ji. — Probable fault. 



d. — Soft, greenish, sandstones and psendo-con- ; g.— Soft, greenish, and gray sandstones, and red 



glomerate and purple clays, and purple clays. 



c. — Red clay. /. — Conglomeratic hed containing crystalline rock 



6.— Hard nummulitic limestone. pebbles. 



a.— Bright-red clay (possibly the band below e.— Gray and greenish sandstones with predomi- 



the nummulitic limestone ?)* nating red clays. 



* In such a case as this, it is often impossible to distinguish between the brighter red clays of the 

 •.ciliary sandstones and the red zone below the nummulitic limestone. 



m ( 193 ) 



