DAMUDA SERIES : IRONSTONES. 50 



on the road between Layeo and Gosee. Judgment can, however, scarcely 

 be given on rocks which are even more imperfectly exposed than those 

 in the Jherria and Raneegunj districts ; and, to accurately test the 

 value of each seam, pieces of coal ought to be procured from a depth 

 where extraneous matter has not been able to reach to. Seams occur- 

 ring in the Barakars may always be looked upon as possibly able to 

 yield fuel of very good quality ; and when the time arrives for the further 

 development of the resources of this field, assays will readily determine 

 the power of each coal. The spots where coal occurs have been pointed 

 out, and those seams which will probably be good are mentioned. 



The ironstones of the middle Barakars may hereafter be utilised. 



A few ironworks are to be met with in the dis- 

 Ironstones. . 



trict, but they only supply local demand. The 



great centre of the iron manufacture is the Karunpoora district, where in 



an area of 500 square miles, there are more than 200 furnaces. 



Section 3. — -The Ironstone-shale group. — This group is typically 

 developed in this field j and its existence cannot be overlooked by the 

 most unaccustomed eye. 



Different from what we see in the Jherria Field, the middle group 

 is made up of distinct carbonaceous shales with just as distinct iron- 

 stones; and as they assume a thickness of at least 1,500 feet, they form 

 a well marked geological horizon in the Damuda series. 



There is no unconformity between them and the Barakars, where 

 an unbroken section is exposed of the two groups ; but near Toeera and 

 Bongahara, there appears to be something of the sort. Faults, however, 

 occur in the neighbourhood where this seeming unconformity exists, 

 so that the evidence is not thoroughly reliable. 



The Ironstones are exposed near Goomea, but are most markedly 

 developed in the Bokaro and Hoharoo. 



( 07 ) 



