112 



ball: geology of AURUNGA A^^D HUTAU COAL FIELDS. 



Section 2. — Iron. 

 The iron ores fotrnd in Palamow admit of a triple classification, 

 founded both on their mode of origin, their geological position, and on 

 their chemical composition. So arranged they stand as follows :— 



Magnetite . 



a. Pure maffnetic ore 



posed and altered. 



\ These occur\ 



I either in bands 



• I and lodes in 



7 Til 1 J )lioi'nblendic )^ „ „„!, • 



h. More or less decom- / ^morpnic 



rocks, or as de- 

 tached crystals 

 in granite veins./ 



Crystalline 

 and meta- 



rocks. 



Siderite and hsematite 



\ 



a. Carbonate or black 



band. 



b. Limonite or brown- 



ish haematite. 



c. Eed haematite . 



/ 



Bedded 



shales. 



Concre- 

 tion a r y 



ma sses 

 in sand- 

 stones. 



Coal mea- 

 sures, Bara- 

 kar group. 



Bed and brown hsematite 



Bands of one or other 

 of these ores occur in the 

 laterite which cap the pla- 

 teaux above 3,000 feet in 

 , elevation. 



Laterite. 



Magjietite. 



From time to time specimens of pure or nearly pure magnetic ore 

 have been picked up by district officers and travellers, or brought in by 

 natives to Dehree and elsewhere from the Palamow sub-division. Such 

 specimens have, on being assayed, naturally yielded most favourable 

 results. Occasionally the localities whence these ores have been brought 

 have been described, on native or other irresponsible testimony, as contain- 

 ing inexhaustible supplies of similar ore. But what has perhaps more 

 than anything else tended to give rise to misconception has been the fact 

 ( 112 ) 



