On the Coal Fields and Coal Production of India. 518 
regarding this field, but a detailed account is, [ understand, about 
to appear. The formations found in the Aurunga Field all occur 
there, and there is some coal. On the southern faulted boundary 
there is a remarkable series of hot springs, from which the locality 
has received its name Tattapani (boiling water). 
XVII. SoutaH REWAH AND SOHAGPUR.* 
This is a wide tract in the Sone Valley, covering perhaps 8,000 
square miles. The geology is imperfectly known; it is probable 
that nearly all the recognized groups of the Gondwana formation 
are represented within the area. Coal occurs, but little yet has 
been ascertained as to its average quality and total amount. 
XVIII. JHILMILLL.+ 
This is a small area of about thirty-five square miles, which has 
not yet been fully examined. Besides Talchir and Barakar rocks 
one or more of the younger groups are represented. 
_Coal seams of some promise have been observed in the Bara- 
kars. Traces of coaly matter, forming a seam of six inches, were 
also discovered in the Talchirs, a quite exceptional circumstance. 
XIX. BisRamPuR.t 
This field occupies the central basis of Sirguja at an elevation 
of about 1,800 feet above the sea. Its area is about 400 square 
miles. The formations met with are— 
Mahadeva, . : , : ; 1,000 feet 
Barakar, ‘ : i ‘ : 500 ,, 
Talchir, : , : 2 : 200 
” 
A large number of coal seams have been discovered, some con- 
taining good coal, but, so faras is at present known, they are not 
of great promise. Thisis of less importance since the locality 
is so landlocked that it is never likely to be the scene of mining 
operations. 
XX. LUKANPUR.S§ 
This field lies to the south of the Bisrampur area, from which 
it is separated by a fault anda belt of Talchirs, with inliers of 
* ‘ Manual,” Vol. I., p. 201. 7 “Manual,” Vol. I., p. 204. 
t Ball, ‘‘ Records Geological Survey of India,” Vol. I., p. 205. 
§ Ball, MS. Notes, ‘‘ Manual,” Vol. I., p. 206. 
SciEN. Proc. R.D.S. Vou. u., Pr. vi. 2M 
