1869.] Proceedings of , the Asiatic Society. 97 



47 and 48 can be read now with much interest ; the crushing of the 

 rocks near Silchar is prominently noticed ; the dome-like shape of 

 Katigunah hill and its anomalous composition, probably owes its ori- 

 gin to some long past convulsions of this area. In fact from Silchar 

 skirting the hills including the country near Sylhet for many 

 miles to the west, it would appear as if local displacement by up- 

 heaval has played a considerable part in recent geological times 

 towards shaping the present lines of the surface, and particularly 

 will account for the detached hills of highly inclined strata, capped 

 and often quite hidden with unstratified conglomerate and gravel, 

 to be seen in many places. But this is entering on matter that 

 would require much local observation and knowledge. 



Returning to the N. Cachar Range near Longitude 92° 50' it is equally 

 interesting and remarkable, to find on the north, several deep gorges 

 through the mass of but slightly inclined Tertiary sandstones and 

 shales, that finally unite and form the Kopili river. This line of 

 the Kopili also marks a great geological feature, namely, the up- 

 throw of the Nummulitic limestone which to the east bends over 

 with all the super-imposed strata, and takes an easterly dip, and is con- 

 sequently not seen again on the Diyung or other deep valleys still 

 further east. On this line of upheaval of the limestone we find 

 perennial hot springs, with very high temperature close to the 

 Kopoli. Approaching nearer the valley of the Kopoli, I have the 

 evidence of the people of the Naga village of Chinam, that the earth- 

 quake w r ith them travelled east. I fully expect to receive in time 

 information from numerous other points near this valley, and in the 

 mean time I cannot but think that the line of origin of the disturbance 

 carried north of the main range lies down the valley of the 

 Kopoli, and with the up-throw of the stratified rocks against, or on 

 the metamorphics. I hope to be able to illustrate this by a map, 

 shewing with arrows the exact position where the direction of the 

 shock was noticed, and I am sure if like information can be collected 

 by any one in Tipperah and Chittagong, that some interesting mat- 

 ter for speculation and thought would result. Enquiries are neces- 

 sarily to be made at numerous places, and although much of such 

 data will be that supplied by natives it is valuable. It is all we can 

 get, and must be made the most of, and only by the accumulated 



