DAMUDA SERIES. 21 



At the head of the main, or eastern, branch of the Chfrangkhola, the 

 Damudas are well exposed, dipping mostly north-west to north-north-west 

 at 20°— 70°, and including buff and grey sandstones, dark-grey 

 and black shales, and several seams of coal, some of which, however, are 

 greatly crushed and disturbed by small, but violent, contortions, which 

 have affected all the seams more or less. The best seam exposed, and 

 adjacent beds, have the following section : — 



Ft. In. 



Dark-grey shale and sandstone, containing abundance of 

 vertebraria without other remains — 



Interbanded coal and carbonaceous shale ... ... 1 



Coal with one or two thin partings of carbonaceous shale ^ 



5 '4" to ... ... ... ... 7 



Grey shaly sandstone and dark-grey shale without ver- 

 tebraria. 



The seam dips north-west at 55°, and has a thickness of 5' 4", at the 

 level of the stream on the west side ; on the east side (20 feet distant) it is 

 6' 6" to 7' 0". Here it is traceable for 45 feet up the bank with a nearly 

 constant dip, but far from constant thickness. At 33 feet it is reduced to 

 2' 6'', and 12 feet higher (where it seems to be faulted against shaly 

 beds) it is again expanded to 5' 0". In the last two spots it is much 

 impurer than below, containing more carbonaceous shale than coal. 

 There is a seam of interbanded black shale and coal lower down the naddi 

 — possibly the same as the above, brought in again by folding, but more 

 probably different — which is 8 feet thick on one side of the stream 

 and only 2 on the other. Another thinner seam is folded sharply back 

 on itself by a small contortion. 



The pagdandi (path) south-east of Selim Hill cuts through a 2 -feet 



bed of coal, and a fine section is laid bare along" the 

 Cart road. ' 6 



cart road at the ' Gumpti ' below Chunbatti. The 

 rocks are here in their least altered condition, and not much twisted, the 

 dip being tolerably steady throughout the section. 



( 21 ) 



