Chap. 'I. ] general description op rocks. 17 



be amply rewarded, but I doubt if any future collector will be able 



to say with one of the earlier discoverers that he " bagged three hundred 



specimens in six hours." I had a man out collecting for about three 



months ; he was a native of Nahun, and an old collector of Colonel 



Cautley's. He did not find half the number that were worth carrying 



away, though, I believe, he worked honestly. A large number of small 



fragments might be obtained, but these are useless. 



The varying nature and the doubtful base of these upper groups of 



the series make it difficult to assign even an approximate thickness. 



It must be enormous in some places. There are local sections 'of the 



coarse upper beds alone, showing a clear thickness of at least 10,000 



feet. 



Such, then, are the groups that will be traced out in the details 



that are to follow : — 



Sub-Himalayan series. 



Upper Sivalik Conglomerates, sandstones, clays. 



Middle Nahun Lignite, sandstones, and clays. 



("Kasaoli, gray and purple sandstones, 

 i 



„ , , I Dugshai, purple sandstones & red clays. 



Lower Subathu ...J J 



j Subathu, fine silty clays, with limestone. 



L (Nummulites.) 



Himalayan series. 



1. Unmetamorphic. 



Krol Krol Hill ...Limestones. 



Infra Krol... Ditto Carbonaceous shales or slates. 



Blini — , — Blini river . . .Limestone and conglomerate. 

 Infra Blini. . .Simla Slates. 



2. Metamorphic. 



Crystalline and sub-crystalline rocks, &c. 

 The remarkable similarity of primary characters pervading all these 

 strata, namely, composition, mode of arrangement, and distribution, mark 



c 



