56 SUB-HIMALAYAN EOCKS OF N. W. INDIA. [CHAP. II. 



character of this (the Kukurhutti) limestone in the thin overlying band 

 near the boundary, east of Shah, over the village of Runi ; and, what 

 may be more important, I noticed the same characters in a limestone 

 about Oniar in the valley of the Tons. Altogether, a very strong case 

 can be made out for considering these limestones of the lower Sutlej 

 area distinct from, and much older than the Krol group; yet, in the 

 present state of our knowledge of these rocks, I prefer to accept pro- 

 visionally the more general argument in favor of their identity. In 

 examining this region I was perpetually struck by the great lithological 

 resemblance and analogy of arrangement of the strata with those of the 

 Krol series. There is the massive, and often siliceous limestone, fre- 

 quently sandy, and passing into sandstone, underlaid by thin limestone, 

 with variegated shaly slates. The non-appearance of the Blini limestone, 

 so constant in the sections to the east, may be accounted for in many 

 ways, even if the presence or absence of so subordinate a member were 

 of much weight. I can even point to a possible representative of the 

 Blini group ; north of the Sutlej, on the spur north-west of Bihul, in 

 contact with a strong dyke of trap-rock, there is a small thickness of 

 coarse quartz conglomerate, overlaid by slate and thin-bedded limestone. 

 If then the limestones of the Sutlej valley be Krol rocks, the whole group 

 must be supposed to have undergone less elevation than elsewhere ; the 

 underlying rocks are less exposed than in the region to the east. 



There is another point to be noticed in connection with the sub- 

 ject of the last paragraph. It must be recol- 

 Supra-Krol. . 



lected that the tact 01 no rock appearing above 



the Krol group, where the section of that group is best exposed, gives 

 neither evidence nor even presumption that these rocks are really 

 (in any strict sense) the top-rocks of our unaltered series. If the lime- 

 stone of the Sutlej region be taken to be of the Krol group, it would 

 remove some of our difficulties to suppose the limestone at Kukurhutti, 

 and its representatives elsewhere, to be a supra-Krol band. 



