150 Records of the Geological Survey of India. [vol. x. 
The residue insoluble in acid contained 8470 per cent, of silica, equal to 33'27 per cent., 
or just one-third the total weight, of the limestone. 
Lower limestone (a). 
Calcic carbonate ... ... ... ... 63'40 
Magnesic carbonate ... ... ... ... 14-41 
Ferrous carbonate ... ... ... ... 4-15 
Ferric oxide ... ... ... ... -63 
Phosphoric acid ... ... ... ... -12 
Insoluble (sand with clay) ... ... ... ... 19'2S 
101-98 
Neither limestone contains more than a trace of sulphur. Of the insoluble residue in (a), 
84'85 per cent., or 16'36 per cent, of the limestone, was silica. It will be seen that the 
upper band contains double as much insoluble matter as the lower. Exclusive of this, which 
is mainly mechanically mixed sand, the two limestones have very nearly the same composition. 
Upper band. Lower band. 
Calcic carbonate 
7426 
78-17 
Magnesic carbonate 
3901 
17*76 
Ferrous carbonate 
6-00 
513 
Ferric oxide 
•46 
•77 
Phosphoric acid 
*12 
*15 
99-85 
10P98 
The inferiority of the upper band has been already proved by experience, and the work¬ 
ing of it has been abandoned for some time. The only quarry now open is in the lower band, 
which, as may be seen from the analysis, is of fairly good composition, although containing 
an undesirably large percentage of silicious matter. 
The quantity of lime that may be expected from it is tolerably large. In the present 
quarry the band has a minimum■ thickness of 11 or 12 feet, and it can probably be advan¬ 
tageously followed for some hundred yards along the outcrop. The average dip of 15° or 
20°, however, with rising ground to the cast, would not allow of its being quarried far in the 
direction of the inclination of the beds. 
Besides its employment as flux, this stone has been burned for lime to some extent at 
Narrainpur, where coal is raised, and at Barakar. The distance from the quarry to Barakar 
is about 10 miles, by a good kacfta road as far as the Damuda, and over a metalled road tor 
the remainder of the way. 
The calcareous hoi'izon may be traced in a north-easterly direction from Baglmrara to 
near the Damuda, west of Narrainpur. But in this northern portion of the outcrop the 
hands are more earthy and impure than the lower one, at least, at Pancket Hill. There 
appear to be three or four bands, which are all thin and arenaceous. Tlie sandstone, also, 
contains calcareous nodules. It would seem as if the deposition of earthy arid sandy mate¬ 
rial has been greater to the north than at Panchot Hill, and that the calcareous element has 
been more ‘diluted’ as it were. 
