NEHBUDDA DISTRICT. 233 



rest unconformably on the disturbed strata, of the coal bearing lower 

 Damudas. Farther down the valley, all the overlying Mahadevas have 

 been removed by denudation, and a good section of the beds of the lower 

 formation is exposed. As was stated when this section was described, 

 these are cut off by a fault, about two hundred yards farther down; the 

 amount of the fault cannot be ascertained, but it is a down-throw to the 

 south, and north of it we find the representatives of the lowest part of 

 the series, namely the green mud and " Boulder bed" of the Talcheer 

 group. Now it is found that this fault, whose existence is thus proved 

 independently of the Mahadeva rocks, is on the prolongation of the line 

 of their boundary, and that it has its down-throw, in the direction 

 corresponding to the direction of the down-throw of their boundary 

 fault. 



It has already been noticed that the present boundary of the Mahadevas 

 coincides to a great extent with the ancient shore 



Varied character of the 

 Mahadeva Rocks at their of the basin in which those rocks were deposited, 



and the presence and mode of occurrence of the 



conglomerates of the series along the line of boundary has been pointed 



out as corroborating this view. ~ The original 



Old shore line. 



shore and the present boundary, do not however 

 by any means thus coincide always, for the fine grained sandstone, and 

 the limestones of the group, which were probably not shore-deposits, 

 sometimes appear at the present limit of the formation, on the outer edge 

 of the hills, and thus we find that the boundary line of the Mahadevas 

 keeps its rectilinear direction independently of the nature of the beds 



, r . / i ' which it cuts off. Nor, on the other hand, does it 



Various rocks along ' ' 



the Mahadeva boundary. geem tQ be j n an y way connecte( l with the stratigra- 

 phical features of the crystalline rocks, which are found along it, faulted 

 against, or supporting the Mahadeva beds, for all the varieties of the 

 schists may be seen abutting in succession against it ; the soft, and the 

 hard, the calcareous, and the siliceous, and the intrusive granite asso- 



s 



