Chap. XIV.] dharwars : crystalline limestones. 
297 
manganiferous material gave rise to minerals not usually found in such 
intrusives. Amongst such occurrences the following may be specified : — 
1. The manganese-pyroxene, blanfordite, in a rock made up of 
quartz, microcUne, and albite or oligoclase-andesine ; at 
Ramdongri, Nagpur district. 
2. Crystals of blanfordite, associated with juddite and braunite, 
in a rock composed chiefly of albite, but sometimes con- 
taining quartz as well ; at the Kacharwahi mine, Nagpur 
district. 
3. A slightly manganiferous pyroxene, with pinkish brown to green- 
ish brown pleochroism ; at Kachi Dhana, Chhindwara district. 
4. Crystals of yellow manganese-garnet in microcline-rock ; at 
Beldongri, Nagpur district. 
5. Yellow manganese-garnet in a pegmatite made up of quartz 
and felspar, the latter being usually either microcline 
or albite- oligoclase ; at Sitapathur, Balaghat district, and 
Bichua and Ghoti, Chhindwara district. 
8. Red manganese-garnet in thin veins of granite made up of quartz 
and felspar (microcline, orthoclase, and oligoclase) traversing 
the manganiferous rocks ; at Jothvad, Narukot State. 
7. A manganese-pyroxene showing the blanfordite type of pleo- 
chroism, in thin veins composed of intergrown micro- 
chne and ohgoclase, with subordinate quartz. This rock 
also contains greenovite, the manganiferous variety of sphene ; 
also at Jothvad. 
8. Felspar (microcline)-braunite-rock with felspar crystal faces 
developed in cavities ; at Satak, Nagpur district. 
Manganese-ores in Crystalline Limestones. 
There is yet another mode of occurrence of manganese-ores in rocks 
that are probably to be regarded as an integral portion of the sediments 
deposited in Dharwar times, namely that characterized by the occur- 
rence of the ore in crystalline limestone in association with the manga- 
niferous epidote, piedmontite. But I have separated these from the 
remainder of the manganese-ore deposits of Dharwar facies, because they 
constitute a distinct mode of occurrence. 
On pages 195 to 206 of a paper published in Volume XXXIII of 
the Records of the Geological Survey of India, I have given descriptions 
of various specimens of crystalline limestone collected in the Chhindwara 
II E 
