TALC11IRS. 19 



up to the limit of the field ; and in the hills to the west of Mura 

 (E. Lon. 77 49'), the actual thickness seen in section is nearly 

 1,000 feet. To the east, they are not so thick, though owing to the 

 prevalence of trap dykes and the rolling of the beds, it is impossible to 

 arrive at any certain estimate of the thickness. At the point where 

 the Barakars of the Tawa field run down south almost to the meta- 

 morphic boundary, the actual thickness seen is very small ; there are, 

 however, no good exposures of the Talchirs at this point ; but, from 

 what can be seen, the dip is not high, and the disturbance at a shorl 

 distance to the north does not seem to have affected the rocks here 

 To the east of the Barakars here the Talchirs run up towards the 

 north and the general direction of the dip is northerly, which is sug- 

 gestive of a considerable thickness of Talchirs having been uncon- 

 formably covered by the Barakars, which must have extended at one 

 time as far as the present Talchir-metamorphic boundary. 



Further east, the thickness does not probably exceed 500 feet, and 

 at the extreme eastern end of the basin the Talchirs have almost 

 died out, though here again this appearance may be to some extent 

 due to overlap by the Barakars. 



Across the Talchirs from Damooa (E. Lon. 78 30'), where they 

 are superficially least disturbed by dykes the dip is very irregular. 



In several localities, as west of Mura (E. Lon. 77 48') near 



the Tamia river, running into the Tawa near 

 Talchirs at high levels. 



Chomow, and in the extension of Talchirs 



among the metamorphics near Bhaldeye (E. Lon. 78 20'), the 

 Talchir boulder beds are found at a very high level, several hundred 

 feet above the general level of the Talchirs in the plain. This is due to 

 a great extent to the rising of the ground to the south, but where 

 they occur in these positions, at a distance from the boundary (as 

 near the Tamia), the unevenness of the floor of deposition has prob- 

 ably assisted in bringing them there, for if a deposit is being formed 

 in water sufficiently still to allow of the fine particles of the Talchir 

 shales settling down to the bottom, the material will be pretty evenly 

 C 2 ( 19 ) 



