Chap. V.] panchet group. 127 



is shown by the gradual overlapping in several localities of the edges 

 of the beds of the Raniganj series, which beds appear to have been 

 denuded before the period at which the Panchet group was deposited. 



The best marked instance occurs along the North-vrest boundary 

 of the great spread of Panchet beds, which occupy the centre of the field. 

 The strike of the Raniganj series, where seen in the Western branch" of 

 the Nunia, in the Hural, near Chinakuri, &c, is about West 10° to 15° 

 South, that of the Panchets West 20° to 25° South, so that the latter 

 group gradually overlaps the edges of the Damuda beds. The iron- 

 stone run, which is marked North of Chinakuri, and is there, as already 

 noticed, 700 feet below the base of the Panchets, disappears near 

 Digari, and at the Nunia the difference in strike is well seen. Here 

 the thin micaceous grey shales and sandstones, at the base of the 

 Panchet group, are seen to dip 30° or 35° East of South, while the 

 Damddas beneath them dip not more than 10° East of South, the angle 

 of dip being nearly the same in both cases, viz. 10°. 



The greater thickness of beds between the band of ironstones and 



the base of the Panchets, North of Panchet Hill, 

 Apparent conformity. . • ; . 



than intervenes near Chinakuri, and the probable 



overlap of the Damuda beds, which occur in the neighborhood of 

 Raniganj, have also been mentioned. It should, however, be remem- 

 bered, that there is a very considerable apparent conformity between 

 the two groups, and that, excepting in the section on the banks of the 

 Nunia, the want of it can only be made out by a careful comparison of 

 the rocks of each formation over considerable areas. 



In mineral character there is a wide difference between the two 

 Difference in mineral groups. The bands of red clay are as character- 

 istic of the Panchet group as coal and carbona- 

 ceous shale are of the Damuda.* These bands vary in thickness from 



* Carbonaceous shale is occasionally met with among the Talchir rocks, but it is rare. In 

 the Panchet rocks it has never been seen. 



