Chap. XLII ] 
RAJPUTANA. 
1157 
of limestone and shale impregnated with manganese oxide. Some 
specimens brought to the Geological Survey Office consisted of limestone 
largely replaced by soft black manganese oxide, and scattered through 
the limestone were remains of a mineral that could not be with 
certainty identified, but which was probably an amphibole, in which case 
the original rock was an amphibolitic limestone. In none of the speci- 
mens, however, had the replacement advanced far enough to give them 
the commercial importance which Mr. Bose supposes them to possess, 
except perhaps for local use as a colouring medium for glasses and 
enamels. 
Rajputana. 
Ajmere. 
In the Geological Survey Museum are specimens of stalactitic 
psilomelane with limonite,! from Ajmere, while recently a specimen of 
pyrolusite said to represent a deposit of this mineral has been sent to 
the Geological Survey by Mr. R. D. Kanga. It was found near Kharwa. 
Alwar State. 
According to Mr. C. A. Hacket 2 large quantities of iron-ore exist 
at two places near the base of the Aravalli series, one near Bhangarh 
and the other near Rajgarh. Judging from the workings, which are 
several hundred yards long and in places 20 to .30 wide, an immense 
quantity of iron must have been produced from thes? mines. He then 
says that an ore from Bhangarh that was a mixture of limonite, 
magnetite, and oxide of manganese, contained 59' 67% of iron and 
12'7 of manganese. If this ore be representative of the Bhangarh 
ores then there must be at this place large deposits of manganiferous 
iron-ore. In this case one would expect the iron made by the natives 
to be of a superior quality like the hheri of Ghogra in the Jabalpur 
district, Central Provinces ; but on this point there is no information. 
Banswg,ra State. 
Manganese-ores have been found in this State by Messrs. Kiddle, 
Reeve and Co. of Bombay. The localities are Itala, Sagwa, Ghatia. 
1 F. R. Mallet, Mineralogy, p. 61, (1887 ). 
2 Rec. Geol. Surv. Ind., X, p. 91, (1877): 
Ibid, XIII, p. 248, (1880). 
