14 GENERAL OBSERVATIONS ON THE 



traceable, even in our very imperfect maps, running about S. 75° W. from 

 the point called the Ramgerh hills, towards Guzerat: this range has numer- 

 ous divisions and a multitude of names, almost every district giving a change 

 of denomination, but to the eye of a Geologist who considers things on an 

 extended scale, there is a parallelism in the disjointed parts, and a general 

 connection and dependance on the central range; the substrata prove this 

 fact, for in every case they preserve that parallelism. The great surface 

 formations of central India and the Dekhin, are the g ranitic, (including 

 always gneiss and sienite ) the sand-stone, and the overlying rocks ; the latter 

 exceeding in their extent those of any other country. The basaltic trap 

 formation extends northward all over Maliva and Sugar, and eastward 

 towards Sohagpur and Amerakantak ;* thence proceeding southward by 

 Nagpur, it sweeps the western confines of Hyderabad, nearly to the 

 fifteenth parallel of latitude, and bending to the N. W. connects with the 

 sea near Fort Victoria, as already noticed, composing the shores of the 

 Concan northward, all the way to the mouth of the Nerbadda, covering an 

 area of upwards of 200,000 square miles. It overlies sand-stone in the dis- 

 trict of Sdgar, and hence may be inferred, that a portion of it at least is 

 posterior to sand-stone: it possesses the common property of trap rocks in 

 general, viz. that of changing the nature of every other rock which comes 

 in contact with it ; and in the district of Sdgar, it is always associated 

 with an earthy lime-stone, which seems to have undergone great change, 

 strongly indicating the agency of heat. According to Captain Franklin, 

 the ^nd-stone deposits are very regular both in their deposition and 

 geological character, and cannot well be mistaken ; their general pa- 

 rallelism to the horizon, and their saliferous nature, appear to him to 

 identify them with the 7mv red sandstone of England, whilst the i^ed marie, 



and 



* It is expected, that the limits of this eastern deposit of trap will soon be more acurately 

 determined by Captain Franklin. 



