172 
Records of the Geological Survey of India. 
[vol. x. 
The title Kamthi is in this case preferable to Raniganj, as the lithological character of 
the rocks is much more closely allied to those of the former than of the latter group. It is 
unnecessary to add here anything to what has already been stated above as to the occurrence 
of representatives of this group in the Talchir field. 
Iiaral'.ar Group .—In the accounts of the Talchir, Raigarh-IIingir, and Korba 
fields will be found nearly all that has been ascertained with regard to the occurrence of 
rocks belonging to this group. That the Hingir field is connected with that of Korba is 
known to he the case, but the intervening country has not yet been examined in detail. 
In view of the possible importance of this field at no very distant period it may perhaps 
be of service to state that in the area temporarily distinguished as the Udaipur coal-field, 
the Mand River, and its tributaries the Korja, Samasota, Meria-Kota, Ududha, Saria, 
Sirni, Kopa, Kharandhoa, Pori, and Baghond, all exhibit sections in which coal and 
carbonaceous shales are exposed. The known details are too voluminous for insertion 
here, but it may he stated that there is a fair prospect of good coal being found. The most 
remarkable section is that afforded by the Samasota River, where a sequence, including eight 
thick seams, is seen bent into a steep anticlinal with gneiss and Talchirs showing at the 
broken crest. 
Talchir Group .—Since the publication of the sketch describing the Raigarh and Hingir 
field, the extension of Talchirs in various directions throughout the adjoining area has been 
ascertained. More particularly worthy of note is the narrow prolongation of the rocks of 
this group on the south-east of the field into the immediate vicinity of the Talchir field, thus 
showing that a connection in all probability at one time existed between the two basins. 
This prolongation extends for about thirty-six miles, from the Ebe to the Boraghat River. 
There can be little doubt, I think, that it occupies an ancient valley which was in all pro¬ 
bability narrower and of a more defined character during the Talchir period than it is at 
present. It is not probable that the hills on the one side, or the Bamra plateau on the other, 
were elevated subsequently to the deposit of the Talchir beds, so that this narrow channel 
may have been the only means of connection between the Talchir basin and that larger 
area which extends from Sambalpur over so extensive a tract to the north-west. 
In my account of the Bisrampur field,* I stated my belief that the boulders which occurred 
in the Talchir beds there, most probably came from the north, and it is possible that, in this 
case, the transporting agent may have travelled from the north-west. At the same time I 
may say that I did not see anything about the character of the gneiss boulders in the Talchir 
field to justify the opinion put forward in the Talchir report to the effect that they had 
probably come from a long distance. So far as I could see, and in consequence of the above 
opinion I gave particular attention to the subject, the boulder beds of the Talchir field do 
not contain any materials which might not have been derived from the very great variety 
of coarse and fine-grained gneisses which are to bo found in the neighbouring areas. In 
the Bisrampur area where boulders of Vindhyan quartzite occur, the case is, of course, 
quite different. In this connecting strip, except towards the Ebe end, I saw no traces of 
a boulder bed, the rocks being all shales and sandstones. They seem to be little disturbed 
from their original position, but at the nearest point to the Talchir field they are cut off 
by a fault which is not improbably a continuation of the main hounding fault of that field. 
During the examination of the older rocks various thiu outlying deposits of Talchir 
beds have been met, not only in the vicinity of the coal-field, hut also far to the south of the 
Mahanadi. In the vicinity of the field, besides the outlier already mentioned near the 
villages of Tuldi and Terda.f another has been found on the east bank of the Ebe between 
Becords, Vol. VI, p. 28. 
t Becords, Vol, VIII, p. 10-1. 
