PART 2 .] 
Blanfonl: On the Geology of Sind. 
163 
Name. 
Sub-divisionp. 
Approximate 
tbickness. 
Supposed g'eological 
age. 
Ebmabks. 
1. Alluvial, &c. 
Unknown 
Recent and post-ter- 
tiary. 
flipper 
5,000 
Pliocene 
Apparently represent- 
2. Manchhar 
\ Lower 
3,000 to 5,000 
Lower pliocene or 
ative of the Siwalika 
proper. 
Upper miocene. 
3. Gij 
1,000 to 1,500 
Miocene. 
j Upper 
4,000 to 6,000 
Lower miocene ? 
4. Nari 
( Lower 
100 to 1,500 
Upper eocene. 
f Upper 
500 to 3,000 
Eocene 
Nummulitic limestone. 
6. Kliirthar 
( Lower 
6,000 ? 
Ditto. 
6* Ranikot 
2,000 
Lower eocene. 
7. Trap 
r Cardita Beau- 
40 to 90 ... 
Upper cretaceous... 
Representative of Dec- 
can and Malwa trap. 
1 monti beds 
350 to 450 
1 .. . 
8- Cretaceous 
■{ Sandstones.. 
700 
y Cretaceous 
A bed of trap inter- 
1 
stratified with the 
1 Hippuritic 
I 
sandstone. 
limestone ... 
320 
) 
Base of lower group 
not exposed. 
Cretaceous beds .—The only part of Sind in which rocks of pre-tertiary age 
are known to exist is in the range of hills running south from S eh wan. Various 
portions of this range are known by local terms, such as Dharan, Tiyun, Eri, 
Surjana, &c., but amongst the people of the country there is no name for the 
range as a whole. By Europeans the northern portion is sometimes called the 
Laki range, from the town of Laki, near the northern extremity, and for want of 
a better name this may be accepted. The old fortress of Ranikot is in this range. 
The Ranikot beds themselves, it may be mentioned, as was already pointed 
out in the previous paper, extend over a considerable area to the east of the 
Laki range, and southward as far as Tatta. They are, however, not exposed 
anywhere in Upper Sind. The area of the beds beneath the Ranikot group 
extends northwards from the fortress of Ranikot to within four or five miles of 
Laki, a distance of about 22 miles. The outcrop, however, is not quite conti¬ 
nuous, for the trap and underlying beds are covered up in places by the Ranikot 
group. The Hippuritic limestone, the lowest rock knoAvui to occur, is oidy 
exposed in a single locality. The range is very difficult of access, and there is a 
permanent supply of sweet water at only one spot, the fortress of Ranikot. 
The spot where the Hippuritic limestone is exposed is at a place called BaiTah, 
about 16 miles north of Ranikot. The range here consists of three parallel 
ridges. The eastern of these faces the plain sloping to the Indus, and consists of 
vertical or nearly vertical Khirthar limestone, on which, to the eastward, 
-Manchhar beds rest unconformably. To the we.stward, Ranikot beds come in below 
