CiiAP. XXXVI.] 
NAG PUR : KODEGAON, 
845 
surrounding alluvial plains. Further, at the west end the hills are 
almost bare of wood, but at the east end often very thickly jungle-clad. 
The commonest rock is a purplish, pinkish or greyish, coarse, vitreous 
quartzite, usually with abundant parallel included flakes of white mica, 
and, as the rock is often schistose, it might in some places be called a 
mica-quartz-schist. Under the microscope it is also seen to contain 
fairly abundant crystals of tourmaline, of indigo, lavender or purple- 
brown colour, which in the hand-specimen appear as tiny black specks. 
This rock constitutes the main portion of the Kodegaon hills, the north 
part of Gumgaon hill, the Haladgaon hills, and the ridge of the Ram- 
dongri range. 
In the section exposed on the left bank of the Kanhan it is seen that 
on both sides of the quartzite band occur decomposed mica-schists, 
often reddish or mottled. The southern band of schists is also seen on 
the southern side of the Haladgaon hills in a murram quarry and as a 
band separating the quartzite and manganese-ore of Gumgaon hill. 
The Kodegaon hills are probably terminated at their western end by 
the boundary fault shown by Blanford as separating the crystallines 
from the Gondwiinas ^. This probably runs north-west from the west of 
mine 1 , past Durbadi hill, the most westerly of the Khapa hills. At the 
east end the Riimdongri hills are separated from the Kuthulna hills by a 
valley, probably corresponding to a fault with a north -north -west strike. 
It should be noticed that all these hills rise out of the alluvium. 
The transport of the ore from these deposits is at present effected 
by carting to Nfigpur in country-carts taking J to nearly 1 ton of ore. 
Both from Kodegaon and Gumgilon it is about 22 miles to Nagpur, 
whilst in going from Riimdongri the Kanhan has first to be crossed by a 
temporary bridge, which gets washed away in the rains ; the total dis- 
tance is about a couple of miles further. 
1. Kodegaon. 
(Indian Manganese Co.) 
{See Plates 23 and 24.) 
Within the Umits of this village there are apparently two separate 
deposits of manganese-ore held on mining lease by the Indian Manganese 
Cotopany. One of them (mine 1) is situated in the alluvium about 
J mile south-west of the west end of the Kodegaon hills, whilst the 
other (mine 2), as shown on the map (Plate 24), just cuts into the north 
slope of the same hiUs. They are apparently two distinct bodies of ore 
separated by the micaceous quartzites in between ; but see below. 
1 JU'Un. G. S. I., IX, map, (1872). 
