80 COAL.
fectly
known; it is probable that nearly all the recognized groups of the
Gondwana formation are represented within the area. Coal occurs, but
little information has as yet been ascertained regarding its average
quality and total amount.
XVIII. Jhilmilli.*
This
is a small area of about 35 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 Barakars. Traces of
coaly matter, forming a seam of six inches, were also discovered in the
Talchirs, a quite exceptional circumstance.
XIX. BlSRAMPUR.f
This
field occupies the central basin 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......... 500 „
Talchir......... 200 „
A
large number of coal seams has been discovered, some containing good
coal, but, so far as at present known, they are not of great promise.
This is of less importance, since the locality is so landlocked that it
is never likely to be the scene of mining operations.
