THE KUIIASIA COALFIELD. 
204 
On scannin<^ the list of oxposuros of horizon 4 it is scon that 
those of workable thickness are conlined to 
Hoii/.on 4. Kaoria Nala at Karar Khoh and the 
neighbouring tributaries, with the possible; exception of the Diwan 
Jharia and Upper Dubpani exposures. 
In fact wo need discuss here only the Karar Klioli arcia. This 
section being so important lias not been 
T/io Kanir Klioli relegated to tlie A])pendix, eAe(M)t in a sum- 
sfctiiiii, Kiimia Nnla . -in i -n i • • r n i i 
mansed form, and will be given in lull below. 
After leaving behind the Dubpani exposure (No. ."'2) and con- 
tinuing down the stream (which now becomes termed the Kaoria 
Nala) for nearly a mile over typical Barakar sandstone, below 
which the Dubpani exposure has dipped, one at last reaches a 
small fall over pot-holed sandstones, at the base of which lie 
some 3 feet of micaceous carbonaceous shales at an elevation of 
1,988 feet. The overlying gritty sandstone itself contains several 
stringers of coaly matter in its basal 2 feet. Continuing 
westwards down the small gorge the shales are found to increase 
in thickness to 4 J feet (including some sandy layers), resting on 
some 6 inches of very black shale, which itself rests on greenish, 
micaceous sandstone. There is now a gentle dip to S. S. E. 
After descending over some 10 feet of these bedded sandstones, a 
tributary joins from the south and then a few yards below the 
junction there commences the waterfall known as the Karar 
Khoh. This fall passes over seams 1 to 3A of the section given 
below, and at its base is a pool carved out by the falling 
water. Passing this pool, and continuing down the stream bed, 
the top of seam 4 is found cropping out at intervals in the banks 
on both sides, and in the bed itself, there being evidently a slight 
roll about a N. E. axis, so that the rocks are soon dipping to 
the N. W. Some little distance down stream the base of seam 4 
is found on the top of a striking barrier or dam of coal 
(Plate 29) stretching across the river-bed from bank to bank. 
This dam, which is 11 feet high, consists, except for 1 foot of shale 
at the very top, entirely of seam 5. A lower 2 feet of this seam 
crops out for some 30 yards further down stream, and then the 
underlying argillaceous and rather fine-grained sandstones appear, 
soon passing down into the typical coarse-grained Barakar sand- 
stones. Between the Karar Khoh fall and the coal barrier a 
good section ranging from seam 1 to the top of seam 4 is exposed 
in the Hathbandha Nala, a steep ravine joining the left hank 
