CiiAP. XXXVI.] 
NAGPUR : MANSAR. 
88.5 
On the south wall the last 2 feet 8 inches of what has been measured as 
part of the ore-band consists of interlaminations of fine-grained mica- 
schist, micaceous quartzite, dark grey quartzite containing abundant 
patches of yellow spessartite, and yellow spessartite-quartz-rock 
(gondite) often in lines of lenticles as 
in figure 62- The rocks here curve 
over so as to change in amount of dip 
in a similar manner to that shown 
in figure .59, page 882. The ' country ' 
south of this consists of ordinary 
medium-grained mica-schists, contain- 
ing a few quartz lenticles. The section 
exposes 50 feet of these schists. The 
manganese-ore composing the ore-body 
is soft and usually of poor quality, 
Fig. 62.-Leiuiculavly expanding and occurs in layeis up to 1 foot thick, 
and contracting band of gondite. There are numerous partuigs of 
fine-grained mica-quartz-schists, with here and there 1 or 2 inch bands of 
dark grey quartzite, often showing thin lines of yellow gamet. Near the 
north wall there are bands of fine-grained light grey quart zite up to 
inches thick, and in one place there is a lenticle of soft ore (see D, 
Plate 34, figure 2) in rather powdery, greyish white, fine-grained quartzite 
containmg some bands of vitreous quartzite i to f inch thick. From the 
fact that at the three places (E, E, F), where the edge of the lenticle was 
seen, the ore gave way to soft yellow gondite, it seems as if we have here 
a good case of a lenticle of gondite since altered inside to manganese-ore. 
At the time of my second visit to Mansar, in December 1906, the ex- 
j ^ cavations on the north side of the bed at its western 
end had revealed the presence, in the thin-banded 
gneisses and spessartite-bearing rocks forming the ' country ' here, of a 
couple of lenticular masses of red hematite. One of these was about 20 
feet long, 4 feet high, and 2 feet thick at the thickest part ; the other had 
evidently been of somewhat larger dimensions, but had been partly 
removed. The mineral is of the soft red ochreous variety. 
With regard to the thiclcness of the oie-band : in the quarry mentioned 
Thickness of the ore- above, it is 46 feet ; on the summit of Mansar Hill 
band. the ore-band, though not properly opened up at the 
time of my visit in January 1904, was estimated as being about GO to 70 
feet thick (measured at right angles to bedding) ; but my visit of 
December 1906 shows that this in an over-estimate, due to the fold 
mentioned on page 882. The true thickness is about 45 feet. .\t 
various places between here and the Chargaon pits the im worked outcrop 
showed widths varying between .30 and 60 feet measured horizontally ; 
IV T 2 
