820 MANGANESE DEPOSITS OF INDIA : DESCBIPTIVE. [ PaRT IV : 
5. Kasai (Kashi) Hill. 
See Bose, pages 77, 86. 
This is the hill marked on the 1-inch map as '1523. On top of 
this hill are massive outcrops of limonite, apparently in horizontal 
columns striking W. 20° S. On the very top of the hill the limonite 
strikes E. 25° N., and at this point it is 36 feet across the limonite out- 
crop. The limonite shows a slaty or schistose structure, is brown in 
colour, and in places contains remains of yellow shale-like material, 
probably representing the rock that has been replaced with formation 
of the limonite. At the N. W. edge of the top of the hill the 
limonite is somewhat quartzose, containing remains of white quartz. 
The grain of the limonite is usually extremely fine, so that the ore 
looks amorphous, except for the slaty structure. It usually contains a 
number of tiny cavities, and is often traversed by strings of radiated 
hard shining limonite and of psilomelane, the latter sometimes 
fining cavities bounded by radiated limonite. In general, the psilome- 
lane has been deposited subsequently to the limonite. Sometimes the 
veins of psilomelane are very numerous, forming a network ramifying 
through the limonite, and occasionally the rock is entirely psilomelane. 
This latter feature is especially noticeable a little way down the S. W. 
slope, where 1 saw quite a lot of psilomelane, one mass being about a 
yard cube as judged from the exterior. At this point the width of the 
outcrop of iron- and manganese-ore is about 45 to 50 feet. 
The evidence obtained indicates that the limonite and psilomelane 
form merely a capping to the hill, being the result of the surface re- 
placement of some underlying rocks striking about W. 30° S. and dip- 
ping at about 45° to the N. W. side. These rocks were possibly banded 
hematite- and magnetite-quartzites. If the cap of this hill were to be 
worked and sorted into two products, iron-ore and manganiferous ores, 
a fair quantity of ore might possibly be obtained ; but I do not think 
it could be profitably worked as a source of manpanese-ore alone. I 
took a sample by breaking off pieces of ore at intervals all along the 
top of this hill. This sample I subsequently divided into two, one 
of them (A. 8) consisting of limonite more or less nianganiferous due to 
the presence of psilomelane veins, and the other (A. 9) of cavernous 
botryoidal psilomelane, with a little attached limonite and occasional 
remains of white quartz. The former sample only was sent for 
