MIDNAPOEE, ORISSA, &C. 261 



consist of excessively granitic rock, so granitic indeed, that it is only on 



„^ . , ., viewing the hills on a large scale that the true 



Their strike. _ _ ^ 



direction of the foliation becomes evident. Its 



strike is then seen to be nearly parallel with the escarpment of the 



range, 10° to 20° E. of N. near Nilgiri, while further S. W. near 



Granite dykes. ^^gj"", it is nearly N. E. and S. W. There are 



very few indeed of the largely crystalline granite 



veins generally so abundant in the more corn- 

 Trap dykes. 



pact forms of gneiss. Trap dykes, ffowever, many 



of them of very great size, are numerous, and most of them, if not all, 



appear to run parallel with the foliation of the 

 Inaccessibility of hills. . . 



gneiss. Ine dense jungles on these hills, their 



steepness and inaccessibility, renders an examination of them exceeding- 

 ly arduous. They rise to a considerable height, Nilgiri hill, the loftiest 



or nearly the loftiest peak, being 1,786 feet above 

 Height. T 1 , . 



the sea, and many other summits are but little 



inferior in elevation. 



Interfoliated with the gneiss there are found in one or two places 

 bands of a chloritic rock approaching serpentine 

 in texture, and quarried to a considerable extent 



by the natives. This rock will be noticed again in reference to its 



uses. The principal localities in the Nilgiri hills 

 Localities of ditto. . , ^ m n ^ -^t., . . 



are situated a tew miles b. of Nilgiri,.and near 



the villages of Santragodia and Goojadeeha. There is also a quarry 



about 2 or 3 miles west of Jugjuri, and there are others scattered 



over the hills. 



A few miles W. S. W. of Jugjuri, and near the village of Paikpada 



Nature of rocks near ^^^ ^°^^^ alter considerably. They become a 

 J"gj""' hard, tough, indistinctly crystallized hornblendic 



rock resembling in hand specimens a greenstone. The foliation is better 

 marked than to the N. E. in one respect, viz : that its direction can 



