1062 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [ PaRT IV : 
purple. In some cases actual fissures must have been formed down 
which fragments of the various soft rocks fell, producing a sort of fault 
breccia seen in various parts of the pit. One sucli case is described on 
page 1064. The small slips in these lithomarges, etc., have frequently 
slickensided them along the cracks. 
Before describing the ore-bodies, it will be well to consider briefly 
the rocks to be found in various parts of the mine. These are nearly 
all in an advanced state of chemical decomposition, the lithomarges 
and wads being some of the products ; and it was only a close exami- 
nation of the lithomarges that led to the discovery of patches of 
less altered rock here and there. 
In the extreme S.W. corner of the pit is some coarse-grained 
kaolinized quartz-felspar-rock containing 
Quartz-felspar-rock. t i c , • 
patches and streaks ot pyrolusite and passing 
above into lithomarge and psilomelane with some pyrolusite. The 
original rock was evidently a quartz-felspar-rock. Another variety, 
now mainly kaolin, contained tiny scattered quartz grains and abun- 
dant limonitic specks, possibly representing remains of garnet, so that 
the original rock here was possibly garnet-quartz-felspar-rock. At another 
point along the south wall in this corner of the mine a coarse-grained 
quartz-felspar-rock was found, with the felspar sufficiently fresh to give 
a potassium fiame-reaction. In the S. E. corner of L (Fig. 49) kaolinized 
fine-grained quartz-felspar-rock was also found. 
Amongst the lithomarges, wads, and ochres, being removed at L in 
„ , , order to get at the underlving manganese-ore, 
Felspar-rock. ^ . J _ t. & 
and well shewn in Plate 49, is a rock, now all 
lithomarge, that was probably once all felspar ; and many similar 
examples are to be found in other parts of the quarry. 
A cutting on top of the bank on the south side of the quarry 
between XL and M shows a patch of vein-quartz 
Vsin-quartz (rose). 
about 4 paces long that seems to be surrounded 
by wad with some lithomarge and to be an isolated mass. The 
quartz varies in colour from pale reddish to pale violet. Vein quartz 
also occur in patches in the lithomarges and wads at M. 
In the N. E. corner of the mine (shown in Fig. I, Plate 50) many 
interesting rocks are seen in the decomposed walls. On descending at 
