10 llAMGURH COAL-FIELD. 



Beyond these seams the river bends about^ following the changes 

 in strike of the grits and sandstones, and no more coal seams are 

 exposed until the mouth of the Gunkea river is reached ; at this point 

 the sandstones, together with several coal seams, are bent into a 

 synclinal basin. Subsequent crushing and faulting 

 ^^^ ' have so disturbed this arrangement that it is 



difficult to trace out the separate seams along the edges. The follow- 

 ing are the principal which can be detected : at the top of the north and 

 south reach of the river is one consisting of 3 feet of coal, dip E. N. E. 

 10°; below this are two seams which are much broken up and are only 

 seen under isolated masses of sandstone which form islands in the bed 

 of the river. On the other side of the basin two distinct seams occur, 

 one dips at first to N.N. W. from which it bends round to W. ; it 

 contains 4 inches of coal. Above it is a thick seam of coal and shale 

 with dip to W. ; this seam is probably the one seen again in the Gunkea 

 river where the section exposes 5 feet of good coal. 



Several other badly exposed seams are seen further up the 



Damoodah, as indicated upon the map ; about half a mile beyond the 



, . ^. last there is one of those large seams which are 

 Large characteristic 



seam. go characteristic of the Barakar group. It is 



probable that this was the principal seam visited by Mr. Williams, and 

 from seeing which he formed an unfavorable opinion of the quality of 

 the coal generally in this field. The details of this seam are here given 

 in full, as they furnish an example of the manner in which a large quantity 

 of coal occurs in a class of seams peculiar to the Barakar group. 



Section, descending; dip 6° to N. 7° W. 



Ft. In. 



1. Sandstone ... ... 2 



2. Sandy sliales ... ... 3 10 



3. Shales with streaks of coal ... 6 



4. Shale slightly concretionary ... 1 



5. Coal ... ... 6 



6. Stony shale 



Carried forward , , , 8 



(US) 



5 



