110 Records of the Geological Survey of India. [vol. VIIL 
Eaigarh. On the east, south and west it is surrounded by hills formed of the upper sand¬ 
stones, under which the coal measures pass. 
To the north the limits have not yet been ascertained, hut from the sections which have 
been examined, and from the general physical structure of the country, it is probable that, 
with a few exceptions in the valleys, where contacts of the Barakars with the underlying 
metamorphics are exposed, the edges of the former are overlapped by the upper sandstones. 
In this central area, the Barakar rocks, which from their position are probably the top 
measures of the group, differ materially from those met with in the Ebe valley to the east. 
Instead of coarse sandstones and conglomerates, there are fine sandstones with much 
carbonaceous shale and some coal. In all probability the coarser rocks occur below, and 
indeed to the north some of them are seen cropping out towards the boundary. In the 
Baisunder sectionf, on the other hand, it would appear that the coarser rocks never were 
deposited, as only a small thickness of sandstone and arkose intervenes between the carbo¬ 
naceous shales and gneiss. 
In the western part of our area the Karket river collects the drainage and affords 
tolerable, though much interrupted, sections. 
Karket Eiver Section. —That portion of the Karket which traverses the upper sand¬ 
stones will be found described on a following page. In so far as the Barakars are 
concerned, it is only necessary to describe the descending section which is exposed between 
Baiamunda and Karamakel. 
The highest rocks seen are some sandstones with three bauds of carbonaceous shale, 
which measure respectively 2'., 3'. and 3'. 6.", the dip being 5° to south-west, which carries 
them under the horizontal upper sandstones. Some ironstones seen to the south of Baia- 
munda, but not exposed in the river section, not improbably constitute the top beds. 
Not far from the mouth of the Katang stream the top of a coal seam is exposed which 
measures about one foot. For about half a mile north of the Katang there are massive sand¬ 
stones, the relations of which to the more typical Barakars are somewhat obscure : at first it 
appeared probable that they might be upper beds resting in a flat synclinal, but subsequently 
seen cases of similarly situated and similar rocks, suggested that they were only locally inter¬ 
polated beds. 
Beyond these again there are thin bedded sandstones with shales more or less carbona¬ 
ceous, having a low dip to south. Less than half a mile to the 
south of Suadera there is a coal seam which contains only eight 
inches of good coal with a dip of 5° south-west. 
From this up to the mouth of the stream which rises in the Duldulla H. S., the only 
rocks seen are thin bedded sandstones and carbonaeeons shales, which vary a good deal in the 
direction of their dips on either side of south, but not much in the amount, never ranging 
above 10.° There is nothing that can be called coal exposed in this portion. 
At the stream, however, there is a seam of which the following is a 
section 
Ft. 
Inc. 
Massive sandstone, about 
... 
... 25 
0 
Shale ... 
... 
... 
? 
Coal ... 
... 
... 1 
7 
Shaly parting ... ... ... 
... 
... 0 
9 
Coal... 
... 
... 0 
5 
Carbonaceous shale with coaly layers 
... 4 
8 
Coal... 
.., 3 
0 seen. 
Base hidden; 
clip 3° S. f 
>. E. 
t Records, Vol. IV, pt. 4, p. 105. 
