Chap. IV.] nahun and sivaltk groups. 145 



built. In the steeply scarped slopes on the south the reverse dip appears 

 nearly vertical. One cannot but feel astonishment at the close proximity 

 of such gentle unbroken curving to such intense crushing ; a closer 

 examination of the locality might discover evidence of unconformability. 



In this neighbourhood I noticed a fact that may turn to some 

 account. In the sections of the Chukkee, of the Nurpur stream near 

 Mudunpur, and of the stream south of Kotleh, in about the same position 

 in each, and thus forming a . continuous line in the zone, there 

 may be seen an abrupt change in the amount of dip from 20° or 30° 

 in younger rocks to 60° or 70° in those below them. There is no 

 break or strain, and the sections were not deep enough to show dis- 

 tinct unconformability. It appears to me as if the lower beds may 

 have been considerably tilted before the others were laid over them. 

 At, and west of, the Ravee this zone of Sola-Singh ee forms the outer- 

 most range. 



The Nadaon dun, the undulating plateau between the Budsur fault 



and the Jualamuki ridge, is occupied by gray 



The Nadaon dun. 



pebbly sandstone and the lower beds of the con- 

 glomerates, dipping at a low angle, and apparently without any very 

 definite order. In its north-west portion there are two subsidiary flex- 

 ures that are well defined for some distance. North of Deihreh the 

 main anticlinal bifurcates, apparently where the Budsur fault begins to 

 be decided ; a flat anticlinal bends off towards Jualamuki, and conti- 

 nues for many miles close along the base of this ridge. Beginning close 

 to the angle of the bifurcation a sharp synclinal fold continues, not far 

 from the Budsur fault, to as far as Sola-Singhee. 



The Gumber fault is traceable continuously to the Ravee, but it is no 



where so well marked as in the Gumber vallev 



The Gumber fault. J ' 



There can always be discerned a ridge of the 



older rocks, passing by gentle slopes into the higher rocks on the 



north-east, always more or less scarped on the south-east, and 



T 



