Chap. XXXVI.] 
NAGruR : 
nEI.DONGEI. 
906 
The ore-band itself is of very variable character. Possibly about 
half its thickne.^'S consists of merchantable ore. 
bimd.*"'""^*''^ The other half consists partly of manganese-ore 
rendered worthless by iiatches of spessaitite not 
completely converted to manganese-ore ; partly of spessartite-rhodonite- 
rock, similar to that in the Kamthi Lady Pit at Chsirgaon ; and partly 
of thin bands ol biotite-quartz-schist and dark grey quartzites acting as 
partings to the ore-layers. The original outcrop, G, consists of spessartite- 
rhodonite-rock, and has for many years been worshipped by the 
villagers as symbolical of some deity and consequently been preserved 
from quarrying ; but although it consists largely of unmerchantable 
material, yet to leave it interferes with the correct working of the 
deposit. One specimen from tliis point shows orange-yellow garnet in 
a soft, dull black matrix of manganese-ore, which shows signs of 
platey structure and may correspond to rhodonite that has suffered 
alteration prior to the spessartite. Another specimen from C) shows 
a layer of botryoidal psiloraelane on the surface of altered 
spessartite-rock. Along the south side there is a large number of 
partings, between the ore-layers, of altered spessartite.bearing rocks 
and grey quartzites. One of these partings is composed of greyish and 
white clay containing brown streaks of iron oxide and numerous pisolites 
and ramifying veinlets of manganese oxides, which are soft, yield a dark 
brown streak, and often pass centrally into compact psilomelane. Near 
the east end of the south side of the quarry were seen at least two feet 
of dark grey quartzites with partings of the above pisolitic clay. An 
8-inch band of these quartzites was rose pink in the middle, and a 
microscope section showed this rock to be composed of coarse-grained, 
much strained, and often granulitized, quartz, with abundance of rho- 
donite and a yellow-brown pyroxene ; the rock is hence practically iden- 
tical with the pyroxenic quartzite found at Junawsini (see page 971). 
At the east end of the quarry, on the south-east side of the deity 
Felspathif intra- mentioned above, there was exposed in 1904 
a mass of very coarse-grained felspar (microcline)- 
rock, the felspar crystals often beijig one to two inches in diameter. 
It contained a little quartz and rather scarce scattered yellow man- 
ganese-garnets up to J and 1 mch in diameter and was often dark brown- 
ish in colour, owing to impregnation and replacement by manganese 
oxides. The exposure was not clear enough to show whether this rock 
was a part of the ore-body or, as seemed more probable, a subsequent 
inti usion. But in December 1906 a very clear section was visible showing 
without doubt that the felspar-rock is intrusive. This is illustrated 
in figure 6-1. In one place this intrusion vras 6 feet across. In another 
it contained a patch 1 foot in diameter of yellow manganese-garnet. 
