MIDXAPORE, ORISSA, &C. 255 



The great fault,* which marks the southern boundary of the coal 

 fields of tlie Damuda^ passes immediately south 



Manjia Hill. 



of Manjia or Medjia Hill, just outside the N. 



Westei'n limits of Bancoorah district. In the northern portion of this 



district, and across towards Malliarah, the rocks stand up boldly in 



well marked ridges, or bands, the prevailing character of which is Jiorn- 



blendic, associated with granitoid gneiss. Strong massive runs of the 



hornblendic varieties stretch across the country in tolerably continuous 



lines ; the general strike of these is nearly east^and 

 Hornblendic rocks. 



west, or a little to the north of east. Many of 



these runs are very highly crystalline. They are traversed by granite 



veins. The more felspathic varieties have yielded to decomposition 



more readily than the others, and are generally coincident with sliaht 



depressions in the general surface, in wjiich deposits of clay, and sandy 



clay M'ith kunkur are not unfrec[uent. The rocks all appear to dip to 



tlie north at high angles. 



Two or three small and badly seen trap dykes are observed cuttino- 



across these rocks and heading a little to the west 

 Trap dykes. 



of north. They are in no case of any great width, 



and appear to have exerted a very triflmg reaction on the adjoining 



rocks. 



Near to Ramchunderpoor and the Damuda, there is a considerable 

 area of a curious granitite rock composed of 

 quartz and felspar (white) with imbedded crystals 



(always twins) of a second felspar of a leaden grey colour. It looks 



* This favdt passes south of the little hill of Manjia, and close to its base. The hill 

 itself is composed of a conglomerate of peculiar aspect, the pebbles are all of considerably 

 rounded pieces of granitic rocks, of felspar, pegmatite, quartzose gneiss &c., in a matrix 

 of sand composed of felspar and quartz, the former being the cementing matter. The 

 bedding is very irregular, but on the whole constant ; the beds strike a little to N. of 

 east, dipping 8° to 10" to the north, forming a bold scarp to the south, within a few yards 

 of which horndeni rocks are seen . 



