TALCHÍR. 1 
Its most important tributaries are the Durgáotí with its sub- 
tributaries; the Sudábah; and the Dánro or Garhwa river. The last 
mentioned stream exposes no coal, but it displays the entire series of 
the Talchirs in the west of the field. 
DESCRIPTIVE ۰ 
In ascending order, the formations usually developed in the coal 
fields of Bengal are— 
I.—Tarcnín, (at base). 
[ ].-1(4 ۰ 
1. Raniganj. 
2. Carbonaceous shales. 
3. Barákar. 
III.—PaNvcnHÉT. 
Upper. 
Lower. 
In the Daltonganj field, only the Talchír series and the lowest group 
of the Damüdás occur. Ishall proceed first to describe the distribution 
of each of these series under their different headings, and then treat 
of the economie value of the field. 
TALCHiR. 
This series presents all its well known characteristics, and I need 
not take up space by describing the lithological peculiarities of its 
boulder bed, its sandstones and its shales. Suffice it to say that the 
series is well represented, and that the sandstones predominate over the 
shales; that the dip of the strata is usually small, and that there are 
few signs of faulting having occurred. 
The contour of the boundary line between the Talchirg and the 
crystaline rocks is extremely irregular. This is due to the inequalities 
of the surface upon which the Talchirs were deposited. In only one 
place could I trace a small cross fault; and the boundaries from one end 
of the field to the other are natural, 
: (ask. 3) 
