20 
Records of Ike Geological Survey of India. 
[VOL. V 
It is in ter banded with serpentine of a rich green, and occasionally, but rarely, of a 
rosin-brown tint, constituting a fine yerde-antique marble. The purely calcareous and the 
serpentinous layers, say from about an inch to a foot in thickness, or in places the serpentine, 
occurs disseminated ill spots through the limestone. Associated with the latter are layers 
of tremolitic hornblende passing in places almost iuto diallage; these hornblendio hands being 
traversed by irregular veins composed of quartz and largely crystallized white and flesh 
colored ortlioelase. The limestone contains large and brilliant crystals of greyish tremolite 
(the tremolite in the hornblendic layers being light-green) and also large masses of a bronze 
colored mica, which from its occurrence in crystalline limestone, its color, and the com¬ 
paratively taint degree in which it exhibits biaxial characteristics, I believe to bo Pblogopite. 
Magnetic iron with pyrites also occurs, but sparingly. In the serpentine silky layers of 
lig'kt-green chrysolite of £ or £ inch thick are frequently met with. 
Slabs of marbles transverse to the bedding, and thus showing the alternation of lime¬ 
stone, and serpentine might be got to any extent of three feet across and with a little selection 
of live or six feet or possibly even more. The rock is quite free from silieious geodes, and 
would thus admit of easy sawing and grinding. 
Fine grained gneiss with hornblende schist and containing crystals of hornblende two or 
three inches across is in contact with the limestone, the rock being so jumbled up that if 
the gneiss were not well foliated, one might easily fancy it to he intrusive granite. 
Several other bands of limestone have been met with, of which some are serpentinous. 
Others again are pure white, constituting a valuable marble.* One of these latter is crossed 
by the road from Singrowh to Mirzapur a few miles from the former town. 
On the right hank of tho Behr a little below Saipur, there is a fine hand, some 25 or 
30 yards thick, of white crystalline marble with serpentinous layers, which may be traced for 
a considerable distance along the bed of the stream. 
I cannot yet give a full account of the corundum bed at Pipra, as it is not included in 
Corundum and associated minerals. the area geologically surveyed, and I was only able to pay 
a hurried visit to the place. The rock occurs in a small 
hill between Pipra and Kadopani (sheet 18, Bewah Survey) and about a mile east of the 
Behr, the beds here having a rather irregular strike about east-west. 
The section across the hill from south to north is as follows :— 
a. —White quartz schist. 
b. —Hornblende rock passing into jade, a few yards thick. 
c. —White tremolitic quartz schist breaking with a fibrous fracture. 
d. —White and green jade, including some purple corundum and containing euphyllite 
and schorl. The coloring matter of the jade is clearly the same as that of the mica (oxide 
of chromium); c and d are about equal in thickness to b. 
e. —Bed of corundum several yards thick. It is a reddish, sometimes purple or grey, 
rock almost compact and crystalline in texture, and containing emerald-green euphyllite and 
sometimes schorl and diaspore in the seams. 
/.—Porphyritic gneiss with hornblende rock. I hardly think that the corundum is 
in direct contact with the gneiss, but it is seen within a few feet of it, the intervening space 
being obscure. 
* White granular limestone also occurs in the slate veins. A very fine mass may be found at the east end of 
Oobra Ilill, two or three miles from the Mirzapur road. 
