514 Scientific Proceedings, Royal Dublin Society. 
metamorphic and sub-metamorphic rocks. Its total extent has 
not yet been ascertained, but it is probable that it is continuous 
with a large area of coal measure rocks, believed to exist far to 
the westward. 
Several seams of coal have been discovered, one of which is five 
and a half feet thick and contains good coal. The rocks belong to 
the Barakar and Talchir groups. 
XXII. RAMPUR.* 
This area adjoins the last on the north, and it is probable is more 
or less connected with that which follows, but it is partly situated 
in a different catchment area near the sources of the Rer river, a 
tributary of the Sone, while the field about to be described is 
wholly within the limits of the Mahanadi basin. The rocks of this 
portion consist of Mahadevas, Barakars, and Talchirs. No good 
coal has been observed yet. The most remarkable seam is 
situate at the base of the massive square block of Mahadevas known 
as the Ramgurh Hill} Above it issues a perennial fountain 
of water, which, with some other peculiarities, have caused the 
spot to be regarded as one of great sanctity by the natives. 
XXII. RaiqurH AND HINGIR.—UDAIPUR AND KORBA. 
The above named places are situated in a wide extent of coal 
measures and associated rocks, which cover an area of not less 
than 1,000 square miles. The country is very wild and difficult 
of access, and our knowledge of the field is as yet imperfect. Es- 
pecially this is the case as to the identity of the rocks younger 
than the Barakar coal measures. There appear to be two dis- 
tinct groups, one containing fossil plants, which serve to correlate 
it with the Kamthi-Ranigunj group, the other being probably 
of Mahadeva age, but, owing to the great similarity in lithological 
characters, separation has been attended with great difficulty and 
uncertainty. 
The coal seams are sometimes of enormous size, thicknesses as 
great as ninety feet, and even 168 feet, having been measured, 
* Ball, MS. Notes, ‘‘ Manual,” Vol. [., p. 207. 
+ “Jungle Life in India,” p. 324. 
+ Blanford, ‘Records G. S. I.,” Vol. IIL, p. 54. Ball, id., IV., pp. 101, 107; VIII., 
pp. 102, 121, and X., pp. 170, 178; ‘‘ Manual,” pp. 206, 210. 
