18 EANIGANJ COAL FIELD. [ClIAP. I. 



Pages 92 to 100 are occupied with a short account of the alluvium. 

 Kunkur and laterite are briefly alluded to, but his remarks are chiefly 

 directed to the agriculture and population of the district. A chapter 

 on faults and dykes succeeds. The two were evidently, as already 

 remarked, confounded to a certain extent, for not only does Mr. Williams 

 include them under the same head in his description, but he used pre- 

 cisely the same symbol, a white line, to represent them on his map. 

 He enumerates twenty-seven large dykes, which are but a small propor- 

 tion of the whole number in the field, and some of those marked are not 

 very correctly laid down in the map. A large tract in the North of 

 the field, extending from Muktochandi Hill to Etiapura, is colored by 

 Mr. Williams as trap, and considered by him (page 105) as probably 

 a continuation of a " broad belt of altered sandstones seen on the North 

 " of Churooleah." The true nature of this tract, a country cut up 

 by numerous trap dykes, will be hereafter referred to. 



Some twenty-five pages of the Report (pages 106 to 131) are occupied 

 with the " Conclusion," and from it we may gain some idea of Mr. 

 Williams's geological views, especially by connecting it with the sheets 

 of sections, vertical and horizontal, above referred to, which accom- 

 panied the map. The first portion refers to the absence in Bengal 

 of Cambrian and Silurian rocks, old red sandstone, and carboniferous 

 limestone. The geological ideas expressed concerning the mode of 

 formation of the sandstones, conglomerates, and coal, are, and were, at 

 the time the Eeport was written, antiquated, and need not be repeated ; 

 but the following list of coal seams is worthy of extraction : — 



Upper Measures. 



Ft. 



1. Mungulpore seam 



2. Khantagoreah. ditto 



3. Kendall ditto 



4. Coal under ditto 





. 



.. 22 







... 





■■ 7 











2 



9 





i 



over . 



3 



6 



Carried 



.. 35 



3 



