822 MANGANESE DEPOSITS OP INDIA : DESCRIPTIVE. [PaRtIV: 
remains of the shale or slate, although in an altered condition. On 
account of its laminated character this ore resembles in appearance 
some of the ores of the Sandur Hills, especially those of Rsiniandurg. 
8. Chhota Chhapra. 
See Bose, page 84. 
9. Mansakra. 
See Bose, pages 85, 223. 
The ridge in which these ores occur runs for about 2 miles in an 
E. N. E. direction, through the village areas of Mansakra, Silondi, and 
Majhgaon. A little ore seems to have been found in Majhgaon, but 
none in Silondi. All that follows refers to the Mansakra portion. 
It is difficult to say what is the predominant rock in the 
ridge, because of the secondary cappings of ores. But judging 
from fairly numerous exposures of the underlying rocks I think it prob- 
able that the ridge consists mainly of jasper or quartzite, with a band 
of hematite-jasper. Mr. Bose maps the ridge as belonging to the 
Gosalpur group, but on account of the presence of this hematitic hand, 
it might seem more reasonable to include it in the Sihora group; except 
that there is no reason why the Gosalpur group should not include hem- 
atitic bands. At the west end of the ridge the quartzites have the 
appearance of having been brecisiated and subsequently cemented by 
limonite, psilomelane, and pyrolusite. This breccia ted appearance is 
really the result of replacement, although it is probable that the rock wa^ 
to a certain extent brecciated during the earth movements that crumpled 
the rocks of this area. On the main portion of this ridge the replace- 
ment has often been carried further than on the western portions. I 
took a sample by breaking off portions of the rock all along the ridge, 
wherever it looked sufficiently good. The sample I divided into two. 
One of these (No. 63) consisted of pyrolusite containing a certain 
amount of residual quartz, and of chert-like limonite. The other 
(No. 64) consisted mainly of the chert-like limonite, often 
showing more or less manganese- ore in cavities and in streaks, this 
ore consisting of both psilomelane and pyrolusite. The results 
of the analyses of these samples are given on pages 814 and 815. 
it will be seen that the sample No. 63 is to be classed as manganifey. 
ous iron-ore rather than as manganese-ore. 
