1833.] Note on Saline Deposits in Hydrabad. 79 
inquiry. The Chinir mines are in general formed by the destruction, 
by water, of hills, such as Banganopilly. The blue limestone has also 
experienced violent changes, forcing the strata into vertical and curiously 
contorted shapes, but in general it is little disturbed. I did not find 
nor hear of the remains of shells, although I looked anxiously for them ; 
but there were, in many situations, numerous tubular perforations 
usually full of a kankar like matter mixed with iron, and very subject 
to decay. They were often arranged in rows, and sometimes lost in 
the stone gradually. If these are justly regarded as peculiar to lacus- 
trine deposits, the absence of shells is singular ; but at Ellore, I have 
seen the trap perforated by similar shaped calcedonies, most properly 
compared to tobacco-pipe stalks. These rocks abound with curious 
minerals and phenomena, but these are the principal facts I observed 
connected with the question of the relations of the sandstone. I 
met with a blue limestone perforated as above, in the Guntoor Circar, 
running into the white lithographic marble of Manopilly, on the Kist- 
nah, and probably in some way connected with the diamond deposits 
of the district. The identity with the Hindustan sandstone appears 
from the number of variegated marks and of grits in the beds; from its 
use for architectural purposes, in being horizontally stratified; in the 
strata being sometimes unconformable ;—in its being in the neighbour- 
hood of saline deposits of the same kind, and in both containing diamond 
mines and various iron ores;—in its passing into quartz rock, and being 
snterstratified with clay slate, though rarely. If there is no misprint, it 
differs in lying on instead of being covered by a blue limestone, without 
fossils: vide GuEANINGs, vol. iii. p. 213. 
P. S. The clay slate is sometimes wanting, and the sandstone then 
lics on the blue limestone as at Pushpagarry, immediately above the 
Chintr diamond mines; and here there are larger grits than in most 
other places, and small veins of quartz. Below the mines, the limestone 
is much contorted and dislocated. The limestone is not one of the dia- 
mond stones of the miners, although it abounds with the gem in the 
beds of Chintr. Nor is there any trap rock amongst them, although 
Werner asserts they are found in Orissa at the foot of trap inaumteeeg 
The subject of the origin of the ‘‘terreins de transport, in which 
they are found, is demonstrated by the associated stones in my posses- 
n; but it appears very doubtful, whether they are of diluvial origin, 
810 4 
as asserted by Buckland, using the word as opposed to alluvial. See 
Reliquie, page 220, and Brongniart’s Traité. 
