Chap. IV. §4.] . raniganj group. 97 



South fault is of small extent, and a large fault separates the two 

 collieries, the Sirsol coal would be lower in the section than that of 

 Raniganj. It is improbable that they should be identical, there is so 

 great a difference in their sections, and the partings of the Raniganj coal 

 are quite distinct from those seen in the mine of Sirsol. 



At the same time that there is so much difference between the Rani- 



„ , . „ n , . . ganj and Sirsol seams, there are remarkable points 



Eelations of Eaniganj ° " " L 



and Sirsol seams. f resemblance between the former and that of 



Mangalptir, but before entering upon these, it will be well to specify 

 what other seams are known to exist around Raniganj. 



In the first place, to the South-east, at a distance of about 1| miles, 



and close to the Damuda River, is the mine of 



Rogonathchnk mine. 



Rogonathch.uk, the property of Messrs. Erskine 



and Co., no out-crop is seen, as it is concealed by the alluvium of 



the river. The seam dips North at an angle of about 3°, and has the 



following section : — 



Ft. in. 

 Coarse sandstone. 



Coal ... ... ... ... ... ... ... 6 



Shale ... ... ... ... — -. ... 6 



Coal ... ... ... ... ... ... ... 5 



Total thickness of seam ... 11 6 

 Coal in ditto ... ... 11 



This seam, like Raniganj and Mangalpur, is intersected by a trap 

 dyke, South of which the coal has been exhausted, and the mine aban- 

 doned. The depth of the two shafts at present worked is 138 and 148 

 feet. The West of the colliery is bounded by a fault, the down-throw 

 of which is unknown, and beyond which the seam has not been found. 

 It is evident that neither the section, nor the probable relations of the 

 coal seam give the slightest clue to the elucidation of the seams of 

 Raniganj and Sirsol. 



N 



