Chap. XXXVIIT. ] sandur state. 1013 
the direction of bedding of the replaced rock. Nevertheless, it is not 
probable that any of these deposits, except perhaps with rare exceptions, 
continue inwards for greater depths than 100 feet. 
I have assumed, on account of the similarity of ores, that all the 
Possibility of original deposits are of the same origin as those of 
beds or lenses of manga- Ramandrug. Considering, however, that only 
TlGSC-OrC 
three deposits have yet been opened up, it is 
necessary to recognize the possibility that some of the outcrops may 
represent original manganese-ores deposited contemporaneously with the 
enclosing rocks, and therefore, like them, possibly extending to consider- 
able depths. But if any deposits of manganese oxide were laid down 
during the period of sedimentation of the Dharwars, it is more pro- 
bable that the deposits were of lenticular shape, than that they were 
continuous beds like the sandy and clayey sediments. And in this 
case such an original deposit would thin out lenticularly in depth, 
although it might be taken up again by other lenses deeper down 
along the dip of the rocks. 
We can now turn to the question of the width of these deposits. At 
Riimandrug Main Bed the full width, across the 
Width of the deposits. p ■ -r^w ^ , 1-1 1 
strike of the Dharwar rocks, to which the rocks 
have been replaced with the formation of the marketable manganese- 
ores, has not been exposed. As shown in the figure 7G on page 1006, it is 
at least 90 feet. At Ramandrug No. 4 the width of the manganese-ore 
deposit across the strike of the rocks is about 90 paces as paced on the 
top of the plateau above. If the interpretation of the structure of^this 
deposit given in figure 78 bs correct, however, this 90 paces must be 
greater than the true thicknes, owing to the rolling of the replaced 
beds. About 100 feet would probably be about the true thickness of 
the rock replaced by manganese-ore. Nevertheless, the effective width 
of the deposit itself is the 90 paces, if the depth of the deposit is only 
to be reckoned as 50 feet. At Sannasil ' Haruvu it is about 24-'i feet 
across the strike of the manganese-ore deposit, of which an actual 
thickness of 110 feet may be considered as the maximum for the man- 
ganese-ore, the remainder being iron-ore (see page 1021). Many of the 
Kamataru deposits have outcrups of considerable width. Thus the 
Alada-marada Banda deposit is 46 paces across, the Durgamma Kolla 
)l u -l 
