1082 
MANGANESE DEPOSITS OV INDIA : DESCRIPTIVE. [ PaRT IV : 
of about 46,000 tons of manganese-ore per annum has been extracted 
from this deposit, making a total of 553,140 tons to the end of 1907, 
which is equivalent to over t of the total quantity of manganese- 
ore extracted from the Indian deposits since the commencement of 
the industry in 1892, and is about | of the total amount of 
0 re extracted in this district. The accompanying rough sketch map 
(Fig. 84) shews the situation of the Garbham deposit with respect to 
GNEISSOSE GRANITE 
N 
A 
xMULARAVALSA 
garbhjOii 
quarry' 
xGarbhetm village 
0 soo IDOO 
l l M ll I ■ 
BDOO FEET. 
Situation of the deposit. 
Fig 84. — Sketch plan of Gaibhim. 
surrounding hills. Most of the flat ground surrounding the deposit is soil 
or alluvium, but on approaching the foot of the 
hills A outcrops of gneissose granite are seen. 
The hills A consist of three-dome-shaped masses of the typical gneissose 
garnetiferous biotite-granite of the district. The granite is streaked in a 
W. 15*^ to 20«' N. direction. The hill C is composed of quartz-rock, gamet- 
quartz-rock and quartz-felspar-garnet-rock, these rocks being possibly 
members of the khondalite series. Hill B is apparently a continuation 
of the same. No true khondalites or scapolitic gneisses were, however, 
found close to the Garbhain deposit. 
