916 
MANGANESE DEPOSITS OF INDIA : DESCRIPTiVE. [PaRT IV 
axis shown on tlio plan, was as in figure 68, which shows the 
course of two ore-beds. 
O 
j The cliff, just to the 
I x-"'' west of C, formed by 
y y^y' quarrying, cut these beds 
/ y'' ,^ along the line D E and it 
Nly{'^ ^_ ^^^^ ^old that is shown 
-^"-^ in the photograph form- 
1'^^^'^ J'JT-^----"' "^v^^^" Plate 39, figure 1. 
I ''^X > The quarrying across 
I E \\ \ the west end of the 
— » 
mound gave a practically 
continuous section across 
Fig. 68.— The course of two ' ore-beds ' at C (See plan of the ore-body and it 
Lohdongri, fig. 66.) was from the evidence 
of these exposures that the section shown in Plate 40 was constructed, 
the southern part, however, being based on the sections seen along the 
east- west part of the quarry running along the south side of the mound. 
Plate 38 is a photograph of the ore-layers as exposed by the quarrying 
across the west end of the hill. Practically all the rock seen is manganese- 
ore, and the floor of the quarry on which the chaprasi is standing is com- 
posed of ore in situ ; in fact, the quarrying had nowhere been carried 
sufficiently deep to pass through the ore-beds into the underlying rock, 
when this was taken (1904). Fig. 2, Plate 39 shows a view of the south- 
ern part of this western section, Plate 38 showing the northern part 
of the section. This second view, being taken from a greater distance, 
also shows, in the foreground, a large quantity of quarried manganese- 
ore piled into rectangular stacks. 
There is often a space between the layers of ore. The width of these 
spaces may be only a small fraction of an inch or it may be as much 
Spaces in the ore- ^ inches. This Space is, as a rule, filled 
body. with clay of a reddish colour, which usually contains 
numerous pisolites of manganese-ore. I fractured a large number 
of these and found that at least a large proportion of them were of de- 
trital origin. Both they and the clay had probably been washed down 
cracks or joints, of which there are many to be seen in various parts of 
the deposit, these vertical cracks also containing red clay full of pisolites. 
It seems probable, however, that some at least of these pisolites are of 
concretionary origin. The spaces between the ore-layers do not, however, 
always contain clay, but are sometimes empty. There are also some 
irregular open spaces in the ore-body that may once have acted as water 
channels. One of these, seen in December 1906 on the south side of 
