38 SKETCH OF THE 



Dangerfield in Malcolm's Central India. I have had but few opportu- 

 nities of examining it ; besides, to enter into particulars would be out of 

 place in my present communication, and I may, perhaps, hereafter recur 

 to the subject. I cannot refrain, however, from giving the following few 

 particulars, as they may serve as hints to any one who may hereafter 

 examine this formation. 



Proceeding from Udaypur to Nhnach directly east, we have a 

 succession of primitive rocks till we reach Nakum, a village about thirty- 

 six miles west of the last-mentioned cantonment. At Nakum, and for 

 a short distance to its east, we have still primitive rocks, but embedded 

 in these we observe the first indications of an approaching newer form- 

 ation. The hills at Nakum, which are craggy and precipitous, are 

 composed of quartz rock of a white color, traversed by numerous seams 

 and cracks, but which is nearly pure, and is arranged in strata conform- 

 able to the other primitive rocks of this district. In this quartz are 

 small belts of a ferruginous variety of the same rock, of a dark yellow 

 color, and approaching to the nature of jasper; and embedded in it, 

 also in small quantity, is a quartzose conglomerate, which is the first 

 indication yve meet with in travelling east of a rock of this nature. — 

 Alternating with the above, and in strata similarly arranged, is a rock 

 composed of white quartz and red felspar, exhibiting a porphyritic struc- 

 ture, the basis being of felspar — some of the specimens present a partially 

 conglomerate appearance. The general structure of the rock, however, 

 is granular porphyritic ; and in conformity with the arrangement which I 

 have adopted, I must class it with the granitic rocks as a granitic porphyry. 



Proceeding to the east of this formation, we have the surface 

 generally covered with soil and vegetation, and numerous low rounded 

 and conical hills are seen rising around us.- The country, too, has a 



