Mr. Fraser's Journey from Delhi to Bombay. 159 



jame principles of structure that have been mentioned in treating of the Inya- 

 dree hills ; the heights being all most distinctly stratified horizontally, with 

 successive ranges or portions of strata arising, in a diminishing series, to form 

 their summits. 



Remarks on the preceding Paper, by the Secretaries. 



The distance from Delhi to Bombay, in a direct line, is about 700 English 

 miles; but Mr. Fraser's route, including his deviations from the immediate 

 line of communication, very considerably exceeds that distance. For the 

 reasons mentioned in the beginning of the paper, a small number only of the 

 specimens which the author collected has reached the Society : but these are 

 nevertheless sufficient, in combination with his narrative, to point out some 

 interesting features of geological resemblance between the districts described 

 and other parts of the world. 



The specimens which Mr. Fraser's collection includes belong, — 1. to the 

 primary formations ; — 2. to the secondary rocks ; — 3. to rocks of the trap 

 formation ; — all of them according in composition and character with rocks of 

 the same classes from other countries. 



1. — The extent of the primary tract in the central part of India, seems to be 

 very considerable. It appears from the present memoir to occupy the greater 

 part of the country between Delhi and Neymuck; and to occur again in the 

 neighbourhood of Bang, and near the banks of the Nurbuddah, where gneiss 

 and granite are visible under beds of sandstone, limestone, and trap. Pri- 

 mary rocks are found also, much further to the south, on the coast near Goa ; 

 not far from whence, to judge from other specimens in the collection of the 

 Geological Society, they join the trap formation. 



The place of the quartz-rock is pointed out by the author as being supe- 

 rior to the granite, gneiss, and mica slate ; and it appears that the hills com- 

 posed of that substance agree with those of similar composition in Europe, 

 in presenting detached peaks and conical summits ; a fact exemplified re- 

 markably in the island of Skye and in the Paps of Jura, among the western 

 islands of Scotland*, and in the sugar-loaf mountains of the county of Wicklow 

 in Ireland f. 



2. — Among the substances of more recent formation than the primary rocks, 

 are greywacke slate, sandstone, and limestone. 



• Geological Transactions, Vol. ii. Plate 32. p. 450. 

 + Ibid. Vol. i. p. 271., and Vol. v. p. 188. 



