TALCHIR GROUP. 23 



of coal-measure sandstones, through which, in one place, gneiss, and in 

 another a Talchir boulder bed appear in a manner which suggests local 

 elevation. 



At the corner of the hills north of Paharpur there are some charac- 

 teristic shales ; and on the western side of the 

 Talchirs near Dighi. 



hills there is an area of about half a square mile 



in which flaggy beds with bands of variegated, rapidly-alternating shales 

 are well seen. 



East and north-east of Khurmatand there is an area occupied by 



similar rocks which, so far as I could see, are unac- 

 Khurinatand. 



companied by any boulder bed such as is met with 



in the more southern localities. There are still two localities in which 



Talchir rocks occur : one is close to the village of Mulbhita, where some 



green shales crop out from beneath the sandstones. The other is within the 



trap boundary, where in some low ground near Telobad, shales, apparently 



Talchirs, capped by a single bed of what may be a Barakar sandstone, 



are exposed in the beds of the streams. Remembering the very Talchir- 



like aspect which some of the intertrappean shales present, it was at 



first with some doubt that I recorded these trap-surrounded rocks as 



Talchirs. 



Although the Talchir rocks of the Rajmehal hills do not exhibit, in 

 any marked degree, the phenomena which characterise the series in 

 other localities, still their occurrence there is of considerable interest and 

 importance to the geologist. 



By means of these rocks we are enabled to trace in the very clearest 



Talchirs afford proof an< ^ mos ^ conclusive way the excessive overlap and 



of overlap. unconformability which exist between the grits 



of the Dubrajpur group and the Barakars. This subject will be discussed 



more fully further on. 



( 177 ) 



