Chap. III.] 



THE TALCHIR GROUP. 



35 



in several directions, must have been greater in the Talchir group 

 than in the Daumda ; so it is probable that upheaval, and denudation 

 also, preceded the period of formation of the latter beds. 



One of the best general sections in the whole field is that seen in 

 the West branch of the Nunia stream. In the neighborhood of 

 Jamiari the Talchir rocks are cut through and are well seen. Their 

 total thickness cannot be measured however, the section being inter- 

 sected by a fault. The greater portion of them consists of greenish- 

 o-rey sandstones of fine texture. The beds seen are 



Fig. 2. Sketch Section of Talchir Rocks near Jamiari. 



~5~ ff 1 g 3 



(Descending.) 

 A. Damuda Rocks. 



1. Mudstones, and hard bands of fine sandstone, one thin bed of 

 hard, grey calcareous shale contains seeds of plants. 



2. Coarse brown grits, containing undecomposed gneiss fragments, 

 with some conglomerate bands. (Pebbles of gneiss throughout.) 



3. Finer sandstones, greenish-grey and rather muddy. 



4. Sandstone, muddy and hard, and flagstone beds. 

 Fault. 



5. ( = 2 and 3 ?) Interstratifications of coarse and fine sandstone, 

 greenish-grey, and dark, and light-brown, with occasional conglome- 

 ritic bands and hard lumps of shale. Stratification in parts indistinct. 



6. (= 4 ?) Finer sandstone, generally hard, with occasional irregular 

 beds of muddy flagstones, and flaggy sandstone, all becoming finer 

 towards the base. 



7. Fine mudstones. 



8. Fault-rock, forming the boundary. 



9. Gneiss. 



