38 SUB-HIMALAYAN ROCKS OF N. W. INDIA. [CHAP. II. 



amount of displacement, the rocks being vertical, and with, as usual in such places, much of 

 the black crush-rock. By some such supposition the whole section between Simla and the 

 Krol is closed up. 



Along the old road, from Haripur to about two miles north of Sairi bungalow, the same 

 succession of rocks can be recognised as between Kundah Ghat 

 and Tara Devi. On the north-east side of Sairi hill there is a 

 small thickness of blue limestone like that of Keari, and in an analogous position, but here 

 the rock underlying it is abundantly conglomeritic. Here also this limestone is the line of 

 demarcation between overlying beds of very decided schistose character, and the underlying 

 slaty rocks, — a position already noticed, as so marked in the case of the Blini limestone at 

 Simla. The ' Shaku line of strain, with graphitic crush-rock, passes along the steep face of 

 the hill north of Sairi bungalow. 



The ridge of Mahasu, to the north-east of Simla, is the best defined longitudinal portion 

 that occurs along this composite watershed. In Mahasu ridge 

 we have the reverse of the Simla dip ; the anticlinal axis being, 

 as usual, a line of greater denudation. This anticlinal is not a single well defined bend. 

 Going along the connecting ridge, from the north-east point of Jako, we find the Simla 

 slates for about a mile approximately horizontal, as seen in the tunnel through which the 

 road passes. Immediately beyond this a high south-south-east dip appears again, and after a 

 short distance we come upon a line of intense strain and contortion, horizontal and vertical 

 strata being seen abutting against each other repeatedly. Still in all this confusion I could 

 detect but the repetition of the thin-bedded grits and slates of the Infra-Blini series ; the 

 faulting, if any, must be slight. 



The introduction of a prevailing north-north-east dip towards Mahasu is very gradual. 

 Along the rise to the ridge, and on it, the inclination of the 

 strata is low and irregular. On the new road, which winds at a 

 constant level along the north flank of the ridge, the same slaty rocks are seen in this condi- 

 tion of broken horizontality ; sharp rolls or contortions are not unfrequent, and in no con- 

 stant direction : the flat undulations also vary, although their longest slope is most frequent- 

 ly to the east-north-east and east. The beds seen on the top of the ridge are more schistose 

 than those below. It is possible that the Blini group is somewhere to be seen, but I failed to 

 notice it. 



From Fagu bungalow, at the east end of Mahasu ridge, passing Theog to Muttiani, 



there is no remarkable eminence along the winding watershed. 



Fagu to Muttiani. .,»- ■,. . -,. . i . ,, .,,,, 



At Muttiani this main drainage ridge is connected with the 



more lofty ridge which extends from the snowy peaks in a West-south-west direction to termi- 

 nate in the summit of Shali, — a conical peak that forms a 

 well known feature in the landscape from Simla. Between 

 Fagu and Theog there are two or three instances of special strain and local contortion, but, 

 as we have seen between Jako and Mahasu, no new rock is introduced, and at Theog the 

 same thin-bedded slaty grits, which I presume to be the Simla slates are, as usual, irregu- 

 larly waved horizontally. To the north of Theog hill a more steady dip commences ; its 

 mean direction is east-north-east, but still at a low angle. Some strong quartzose beds here 



