4 BOKAllO COAL-l'IELD. 



gical interest is marred by the imperfection of its section, and the almost 

 total absence of any exposure of coal along its banks diminishes its 

 importance for our purposes. 



The principal river in fact is the Bokaro ; and its northern and 

 southern water-sheds are the only ones in connec- 

 tion with the physical geography of the district, 

 which exclusively (or nearly so) belong to the field. The northern 

 water-shed is identical with the outer scarp of the Hazareebagh table- 

 land, of which Jeeloonga (Jiliinga) Hill is the 

 highest point. The largest body of water fur- 

 nished to the Bokaro is derived from the ar^a to the north of it. Its 

 feeders, however, are few and small, drying up at the commencement 

 of the cold weather, so that the Bokaro never contains any large volume 

 of water, except during the rainy season. 



" The southern water-shed is very faintly indicated (if we except 

 Loogoo HUl) by slightly rising ground between the true river valleys of 

 the Bokaro and Damoodah. 



There is a superior interest attaching to this area, as compared with 



the Jherria Distiiet, from the fact of the deve- 

 General geology. n i • -i 



lopment of a higher series of rocks, and from the 



discovery of, and confirmation of, apparently unconformable overlap 



between the several groups and formations which occur here. Hitherto 



our classification has been in a great measure one dependent upon 



lithology, although not purely so ; and it is a matter of congratulation 



that this is now borne out by collateral evidence of a less arbitrary kind. 



The area occupied by the field is excessively narrow. Coincident 

 with this, we find that the strata occm*ring within its limits are highly 

 disturbed in many places, and that flexuring and faulting exist to so 

 large an extent that the stratigraphical relations of the beds become 

 greatly confused and complicated. 



( ^'2 ) 



