22 lUVMGURII COAL FIELD. 



•former, even under the most favoratlc conditions of market and carriage, 



could ever be extracted with profit. 



In the western extension of the field wlie*e the coal is not only of a 



workable thickness, but also of much better quali- 

 Coal in the west. ■,■,'■,■,• ■• ■, • no 



ty, the high dip and the cutting oft and crushing 



up of the seams by faults cause them to be even less likely to produce 



a profitable out-turn of coal. 



It does not seem probable therefore that the Ramgurh coal field will 

 ever be worked to any great extent. 



The usual carbonaceous ore of iron is found in the ironstone shales ; 



it is, however, of an inferior quality, and its abund- 



Iron orCt 



ance is below the average found in other fields. 



VII. — Crystalline Rocks. 



In the course of the examination of the Ramgurh Coal-field, occasion 

 was taken to visit and note upon the characters of the surrounding 

 crystalline rocks. The general results of this cursory survey will be 

 briefly indicated here. 



Within the area which has been thus visited (the limits of which 



may be best understood by a reference to the 



Igneous rocks. 



accompanying maj)), no true igneous rocks, with 



the exception of the traps already mentioned, have been observed. 



Granites and granitic syenites, which in hand specimens are litho- 



loffically undistinffuishable from ordinary intrusive 

 Granite. & j & j 



igneous rocks, occur abundantly. Examination in 

 the field has, however, tended to show that in every instance these are 

 referable to one or other of the following sub-divisions : — 



a. The first and most abundant variety is simply an uufoliated 

 gneiss; it occurs regularly intcrbeddcd with the 



Tlu-ee varieties. « t . t • ^ ^ • ^ r • ^■ ^ ^ • ^^ 



foliated gneiss and schists, but is lithologically 

 imdistinguishablc from a true granite ; we shall allude to it ngain when 

 speaking of the mctamorphic scries generally. 

 ( 130 ) 



