Chap. IV. § 4.] 



RANIGANJ" GROUP. 



'31 



coal, 2 or 3 feet thick, are overlaid by thin sandy shales, containing 

 Glossopteris. Upon these rests the coal seam worked at Chokidanga 

 and Mamudpur, the former colliery belonging to Messrs. Nicol and 

 Sage, the latter to the Bengal Coal Company. * Mamudpur has hitherto 

 only been worked as an open quarry. 



The section of the seam at Chokidanga is 



Sandstone and shale. 



At Mamudpur: — 



Sandstone and shale. 



Blue shale 



Coal 



Blue shale 



Coal 



Blue shale, with strings of coal variable, average about . . . 



Coal not seen, said to be 



" Hard rock" 



Total thickness of seam 

 Coal in ditto 



Ft. 



1. 



Coal 



... 



... ... ... 



3 







2. 



Shale 



,,, .. 



... 







6 



3. 



Coal 



... 



... ... 



... 6 



6 



4. 



Shale 



... .. 



... ... 







3 



5. 



Coal 

 Shale, 



6 inches. 



... 



... 5 









White sandstone. 



Total thickness of seam 









... 15 



3 









Coal in ditto 



... 14 







Ft. in. 



6 







1 











4 



3 



6 



2 



3 



7 



6 











14 



7 



12 







showing a wide difference from the other section, which is at a dis- 

 tance of not more than half a mile. 



The whole of this seam near the out-crop, for some distance, on both 

 sides of the Singaran, but especially to the East of the stream, has been 

 worked out. The colliery extends on the East as far as a fault, which 



* Mamudpur was till lately worked by a native. 



