THE HILLS OF SITABALDI, NAGPUR, &c. 127 



lying rocks. Numerous opportunities must arise during the excavation of 

 wells and baths, of ascertaining the connexion of the strata beneath. A 

 well in Mr. Alex. Gordon's garden, near the base of the hill, of about 

 forty feet depth, penetrates through three or four feet of black soil, suc- 

 ceeded by a magnesian siliceous clay, which appears to owe its origin to 

 the decomposition of the gneiss, by which it is immediately followed, and 

 which continues to the bottom of the well. 



From the summit of the hill of SUahaldi, the difference in the out- 

 line of the rocks eastward is very perceptible. * The flattened summits 

 and long flat outline with the numerous gaps of the trap hills, are 

 exchanged for the ridgy, peaked, sharp, outline of the primary rocks. At 

 liamtek and its vicinity, the rocks are of granite and gneiss. At Dun- 

 gari, at Palora and Parsmii, are found crystallized marbles passing 

 into gneiss, capable of receiving a fine polish. Some of them contain 

 a small quantity of carbonate of magnesia. At Khorari, a dolomite or 

 magnesian marble is found also in gneiss. At Nayakihid, Parsuni, and 

 the bed of the Pesh river, granite and gneiss of various kinds, also 

 quartz rock and sandstone ; and foliated black manganese ore is in great 

 quantity. 



* Captain Bayley's plates of the Battle of SUc^aldi, give a very correct idea of the flat 

 outline of the basaltic trap hills at Nagpur. 



VII. 



