it from the lack 



in and Dharwar rocks are frequent: 



s the term " dome gneiss " (more pi 

 ven to the rock. The shelling off of t 

 rock renders it singularly I 



The detritus at the base of thes< 

 .11 covered. Excellent examples o: 



extends into the Gidaur HUN. 

 Kanehi plateau, north of Bandgaon 



Muni, pegmatite and large mica- plates have also l.een observed, and 

 may perhaps become workable. The large hill known as Koderma 

 Hill in the Dharwar mica-belt appears to be granitic, perhaps dome- 

 alumina, magnesia, iron oxides, potash) is -dnguhiiK proof gainst 



-landing remain barren of all vegetation. 



47. Vindhyan series.— The Naga Untari Hills, situated in Zemin- 



from which all large timber has been removed, are noteworthy from 

 their abundant crystalline limestone, especially near Bonahatpur. 

 It is frequently hollowed out into caves which form a refuge for 

 bears. l n these hills is also Biotite gneiss and a brownish daty- 



the Vindhyan rocks spreading 



x is of a large ma-s of shite which 

 belongs to the Kadapah Svstem (or Algonkian, post- Dharwar and 

 1- •• -Vmdhyan), the only known rocks of this system, I believe, in the 



49. <;<m>Urana rocks.— After the Cambrian (Vindhyan) period the 



received any mm .. I hen-trine (besides 



volcanic deposits) are of considerable importance. The Gondwana 

 system of the Rajmahal Hills has already been referred to (para. 26 



