352 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



the means of upheaving. In both the districts under consideration 

 the general strike of the strata is N. & S., corresponding with the 

 direction of the streams and mountain-ranges, and in that last men- 

 tioned the dip is for the most part to the west. But it is on the 

 north that the greatest development of granite and crystalline schists 

 occurs. There we may perceive these rocks rising to the surface 

 (though it would be hazardous to conclude that there are not others 

 of a different character in the hollows covered up by the deep soil) 

 from Nagpur north-eastward to the lidnji Hills, — a distance equal to 

 the length of our trappean parallelogram, and with a breadth in pro- 

 portion. This second parallelogram is applied perpendicularly, but 

 unequally, to that previously described. Near the line of contact, 

 i. e. in the district near Nagpur, the gneiss and other metamorphic 

 rocks, like the hills and tributaries of the Wein Ganga, which run 

 through it, had uniformly an east and west direction, with veins of 

 the massive rock penetrating them at right angles to the strike. 



This is the case with the crystalline formation north of the Kampti 

 quarries, which has communicated to the sandstone strata there and 

 at Silewac?a a southerly dip. As the granitic eruption, however, is 

 traced up the basin of the Kanhan, it is seen to bend round a little, 

 and to give a westerly inclination to the sandstone at Babulkhec?a, 

 Tondakheiri, and Adassa. From the last-mentioned place it pro- 

 ceeds northwards past Saner and Kelod, in a narrow stripe on both 

 sides of the Kanhan up to Dewagac?. Beyond this we find it rising 

 up around Chindwa^/a, and running west into the shaly beds of Jam- 

 wahi and Hardagac?. But returning to the neighbourhood of Nag- 

 pur, we discover parallel to the great body of the granitic formation 

 on the north of Kampti a range of quartz hills running in the line of 

 the strata westward from Waregaum to Gumtara. The plutonic 

 force, which has tilted up these, has greatly disturbed the limestone 

 rocks at Korhadi, and given to the sandstone at Bokhara, on the 

 south of the Kolar, the same dip as we observe at Silewac^a and 

 Kampti on the north of that river. 



Sandstone. — But let us now refer to the sandstone formation, 

 which I have said exists in the central parts of our area, though only 

 the wreck of what it once was. Its upper member, reduced in thick- 

 ness by metamorphic agency, may be observed horizontally entering 

 the trap-hill of Sitabaldi on the east side, and again emerging on the 

 west. It is then wholly displaced by gneiss and granite towards the 

 Nag River, after which it again becomes the surface rock for a short 

 distance to the west, until it is a second time overlaid by trap. It 

 remains thus concealed for sixteen miles, when it is seen on the north- 

 west of Yahar at Nimji, whence it extends to Satnawari on the south- 

 west and Kotwalbac^i on the north-west. At these villages it is a third 

 time covered up by trap, nor does it in that direction rise again to 

 the surface within our area, or indeed, I believe, anywhere beyond 

 it. The division of this formation which proceeds to the north of 

 Nagpur occupies a part of the basins of the Kanhan and Kolar from 

 Kampti on the south-west to Kelod on the north-west, being about 

 thirty miles long and twelve broad. Its north-eastern border touches 



