?t. 



In. 



8 







2 











9 







9 



1 







4 











1 



9 











4 



1 



3 







3 



1 







1 



6 



DAMUDA SEMES. 27 



altered (except the coal, which is as flaky as usual) and remind one of 

 the typical rocks of Baniganj : — 



Felspathic sandstone 



Coal (dipping N. 15°, W. at 70°) 



Carbonaceous shale, with a few nodules of ironstone 



Olunchy shale 



Shaly sandstone 



Grey arenaceous shale 



Coal 



Felspathic sandstone, with black (carbonaceous) specks 



through it, and the faces of the beds in the lower part 



blackened by carbonaceous matter 

 Grey shale 



Felspathic sandstone... 

 Coal (dipping N. 20, W. at 80°) ... 

 Carbonaceous shale ... 

 Grey shale 



Blocks of greenstone, evidently derived from one or more dykes, 

 are brought down by the stream. 



But little of the Damuda rocks is seen in the Ramthi, as that portion 



of its course is mainly occupied by the shingle 

 Ramthi naddi. 



delta above Bom Tal. In a side jhora an 18-inch 



seam of coal outcrops with a dip of 50° to west 30 c north. At the head 



of the delta the Damudas are made up principally of indurated 



sandstone and dark-grey slates, dipping north-west at 60°. 



The last Tertiaries seen in the Ghish are massive sandstones dip- 

 ping north 30° west, at 30°. Twenty yards higher 



Ghish river. 



up stream, one or two coal outcrops are obscurely 

 seen in a little lateral watercourse, and the rainwash brings down pieces 

 of Damuda sandstone and dark-grey micaceous shale containing abun- 

 dance of vertehraria. Beyond this there is some sandstone, dipping 

 west 30° north, at 60° ; and just below the mouth of the stream which 

 joins the Ghish from Songchonlu are dark-grey slaty beds and slaty 



( 27 ) 



