1096 
MANG4NESE DEPOSITS OF INDIA : DESCRIPTIVE. [ PaRT iV : 
with fairly good psilomelane in places and a large amount of very cherty 
rock. At the western end there is a small mound showing a very 
cellular rock composed of chert and ore. The ore exposed in these 
workings is doubtless an extension of the Garbham deposit. 
12. KotakaPFa. 
There are two separate deposits within the limits of this village ; 
they may be distinguished as T and II. 
W. 25° S. from the village, say i mile (incorrectly indicated on map, 
^ J where deposit has been placed S. 25° W. of 
village instead of W. 25° S.), were some aban- 
doned shallow pits dug during 1898-1900 by Messrs. A. S. N. & Co., who 
are said to have sent a little ore to Chipurupalli Railway Station. The 
general strike of the pits is about east and west. One of them shows 
beds of psilomelane containing spandite, and dipping at 30^ to about S. 
Several other square pits showed psilomelane much mixed with 
limonite and often, in addition, brown chert. 
From some 65 tons of ore stacked here I took sample A. 20 consist- 
ing of psilomelane, often very cavernous, stalactitic or botryoidal, and 
containing limonite in some of the cavities. Some pieces showed 
manganese-garnet included in the ore. The sample was analysed by 
Messrs. J. and H. S. Pattinson with the following result : — 
Sample No A. 20. 
Manganese peroxide . . . . . . 59-52 
Manganese protoxide . . . . . . 3-89 
Ferric oxide . . . u „ . • 19-57 
Baryta ....>... 0-16 
Silica (combined) . . . . . . 3-45 
Silica (free) ........ 0-25 
Phosphoric oxide ...... 0-31 
Water (combined) . . o o . . 5*50 
Moisture at 100°C. 1-85 
This is equivalent to : — 
Manganese 40-64 
Iron 13-70 
SiHca (total) 3-70 
Phosphorus ■ . 0'134 
The ore is therefore low grade manganese-ore. 
