3 GRIESBACH : RAMKOLA AND TATAPANI COAL-FIELDS. 



and there hollows in the metamorphic rocks^ indicate the former extent 

 of those deposits. 



From a distance scarcely to be distinguished from the flat-topped 

 gneiss plateaux, are the Mahadeva sandstonchills, so conspicuous towards 

 the central west of the coal-field, forming, as they do, vast table mountains 

 occupying the centre and composing the main portion of the Gondw^na 

 area in the vicinity of the K-er river. 



I have only examined the basin between the rivers Kunhur and Rer, 

 where I found the actual coal-measures exposed in patches lying within 

 the areas of denudation of four tributaries of these rivers, and, for 

 convenience of description, I divide the coal-field therefore into two 

 groups, namely — 



I. The eastern basin, belonging to the Kunhur river system, com- 



prising — 



A. The Tntapani and Sendur river sections. 



B. The Banki river sections. 



II. The western basins, belonging to the Rer river system, compris- 



ing— 



A. The Iria river sections. 



B. „ Morne „ „ 



C. „ Mahan „ „ 



With the exception of a few miles of natural boundaries along the 

 eastern and south-western limits of the coal-field, the latter is brought 

 alongside of the metamorphic rocks by extensive lines of fault, here and 

 there of remarkably straight direction, along which, as is to be expected, 

 hot springs occur. The most remarkable ones are situated in the vicinity 

 of the Tatapani village near the Kunhur river ; Mr. V. Ball has mentioned 

 the occurrence of these springs and gives the temperature of some 

 of them.i 



1 Mem. Geol. Surv., Vol. XV, Pt. I, p. 22. 



( 130 ) 



