Chap. III.] 



THE TALCHIK GROUP. 



33 



their position in the series, representatives of the Talchir group, 

 a surmise which has proved correct. The section is 



Fig, 1. Diagram Section of the Talchir Rocks, North of Taldanga. 



{Descending.) 



A. Damuda Rocks. 



1. 



Coarse, purple and brown sandstones, with occasional thin interstra- 

 tifications of fine silty beds. The coarse beds contain numerous 

 pebbles and boulders, mainly of quartzites, and varying in dia- 

 meter from about 12 inches downwards 



2. Similar, but less coarse bed of whitish sandstone, weathering with a 



botryoidal or rather reniform surface. This is in places of a pe- 

 culiar bluish-green or greenish-grey. These beds become gra- 

 dually finer in texture towards the base. They are false-bedded 



3. Thin sandstones and some mudstones, with calcareous nodules 

 Trap dyke. 



4. Sandstones interstratified with mudstones — the latter predomi- 



nating towards the base... 



5. Tine mudstone, with some bands, irregularly interspersed, of fine 



hard calcareous sandstone 



Total ... 



Feet. 



165 



280 

 50 



245 



15 



815 



6. Gneiss. 



Mr. Williams's section gives 675 feet, but it was probably measured 

 a little further West, where some of the uppermost beds may be denud- 

 ed. In either case only an approximation has, in all probability, been 

 obtained, there being no easily measured section of the beds exposed. 



Where the Talchir group is thick and well developed, the above may 

 be considered fairly to represent the section ; coarse white or brown fels- 

 pathic sandstones, occasionally conglomeritic, occur at the top, and from 

 them there is a gradual passage downwards to fine silty beds. But in 

 proceeding either East or West from the place where the above section 



