TALCHEEE COAL FIELD. 



45 



afford the only opportunities of examining and judging of the nature 

 and succession of the rocks. 



The banks of the Brahmini, the only large stream passing through 

 these beds, seldom expose anything but alluvium, especially to the 

 North of Talcheer. But at the extremities of the field, and parti- 

 cularly towards the Southern boundary, the lower beds are seen well 

 exposed, resting undisturbed upon the gneiss. 



It is from this part of the field principally that the succession 

 of the beds has been made out and the following division of them 

 established. 



There appear to be three main divisions of the sedimentary rocks, 



each resting unconformably on the denuded 

 Division of tlie sedi- 

 mentary rocks three- surface of the One beneath. They may be classed, 

 fold. . -11 • 1 1 



as m the section below, with the names respec- 

 tively attached. 

 The thickness of the beds, as given in this section, must be considered 

 as merely approximative, most of the beds differing much in various 

 parts of the field owing to denudation as well as to original differences in 

 deposition, and moreover exact measurements being in most cases 

 impossible from the nature of the sections. 



Section in descending order. 



Proposed Names. 



Characters of beds, sub- 

 divisions, &c. 



Estimated thickness 

 in feet. 



1. Mahadewa Group 

 or 

 Upper Grit Series. 



1. Unfossiliferoiis, quartzose 

 grits, conglomerates, 

 and coarse sandstones, 

 the conglomerates pre- 

 dominating towards the 

 base of the series. 



- 



1500 to 2000 



