402 Second Report on the Geology of Hyderabad. [Ave. 
Some of the mountains exhibit marks of great disturbance: the dip 
of their strata is to the south-east, and on their summits the quartz 
rock and clay slate appear to be indiscriminately mixed. The chasms 
formed by these disturbances give passage to foaming cascades, the 
only sound which breaks the awful silence of their solitude. 
The rock is generally indurated clay slate passing into flinty slate, 
containing drawing slate but no roofing slate. 
On the banks of the Kistna between Amrawaté and Warripilé 
beyond which I have not traced it, and from Warripilé to within three 
coss of Nacricul, is found a limestone in horizontal strata. 
When first seen it lies on the surface of the earth in large flat masses 
partly covered with alluvial soil; its colour varying from a dirty white 
to a pinkish white, from which it passes into a compact black rock which 
is capable of receiving a good polish. It subsequently assumes a whitish 
green and pinkish grey, and on the banks of the river it is found of all 
these colours except the black. Veins of green hornstone are found 
passing through it, and at times small masses of red iron ore. It con- 
tains no petrifactions. 
It is well adapted for building, for sculpture, for mortar, and I be- 
lieve for water cement. Large pagodas and forts built of it bear fewer 
marks of age than most of the granitic structures. 
The town of Ddchapili is entirely built of it, as well as a large 
pagoda and fort at Warripilt. The famous basso relievos of Amra- 
watt, for the first account of which we are indebted to Colonel. Mac- 
KENZIE, are formed from this rock. 
A pure lime is obtained from numerous veins of calcareous spar on 
the river bank, and I conceive the black limestone contains the requisite 
proportion of alumina and iron for making a good water-cement. 
No inland carriage is required, since it is quarried on the banks of 
the river, and may be carried down at all seasons of the year to Ma- 
sulipatam. : 
An analysis of one hundred grains of grey slaty limestone gave 
Carbonate of Lime,.............. 84 
AASUNING Fase Te ote aie Gene ROR aE c 8 
ATOM Re cers cute oc citer wie 4 
Loss, Sheveuateasteta edie tae iota ete 4 
Grains, 100 
Iron Ores. 
I have hitherto seen no ores of iron in the granite. The sandstone 
and iron clay are the most productive. They consist principally of 
earthy brown and red iron ores, poor in iron, but easily smelted. The 
