Chap. XXXVI.] 
NAGPUR : PALI. 
957 
MaiiKaiu'se 17 -79 
Iron 1-39 
Pho8])lioni.s 0-05 
Specific gravity . . . . . . . • • 2 '97 
27. Pali. 
(Central India Mining Company.) 
{See Plate 42.) 
The crystalline limestones in which the manganese-ores are con- 
tained are situated on the east side of the Pench River, to the north and 
north-east of Pali village. They have a dip that varies in amount from 
15° to nearly 90°, averaging about 45°, and which varies in direction from 
east-south-east; in the southern part of the band, to south-south-east or 
even south, where the band of limestones has curled round so as to 
strike east-north- east to east. These limestones rest on a great thick- 
ness of quartz-pyroxene-gneisses, which lie on the north-west side of 
the crystalline limestones and rise to form several small hills. Intru- 
sions of tourmaline -pegmatite and tourmaline-granite are seen in many- 
places in both the quartz-pyroxene-gneisses and the crystalline lime- 
stones. The limestones are usually medium-to coarse-grained and 
vary in colour from white, grey, pink, and yellowish, to brown and 
black. They are sometimes tree from accessory minerals, but often 
contain some or all of the following minerals : — quartz, diopside, 
amphibole, garnet (yellow), epidote, and piedmontite. In many places 
the rock is black due to the deposition of a dust of manganese- 
oxide along the cleavage and twinning planes of the calcite. This 
black limestone often contains, besides spessartite and apatite, abund- 
ant, shining black grains of a manganese-ore (braunite). In many 
places the limestone has been silicified so as to be con c rted into a black 
chalcedonic chert. The spessartite often remains imchanged, and in 
cases where black manganese-ore grains were present in the original 
black limestone, these have persisted as shining black specks in the 
resulting black chert. In many places the limestones, especially those 
with piedmontite, contain nodules and small lenticles of crystalline 
manganese-ore. As at Mohugaon these could not be profitably extrac- 
ted irom the solid limestone. At one place, however, at the east end 
of the manganiferous limestone, two pits exposed an accumulation of 
nodules, formed no doubt by the removal in solution of the containing 
limestone. The quantity was, however, not large ; a sample taken here 
was analysed at the Imperial Institute with the following result : — 
Sample 15. 
Manganese peroxide ........ 50 '70 
Manganese protoxide . . . . . . . .24 '05 
Ferric oxide . . . . . . . . . 7'75 
Combined silica . . . . . . . .3'21 
Free silica . . . . . . . . .2-24 
Phosphoric oxide . . . . . . . .0'21 
Moisture at 100°C 1-32 
Carbon dioxide . . . . . . . . .1-14 
