SHEKH BUDfN HILLS. 75 



The presence of these pebbles shows that eocene rocks were being- 



Eocene pebbles in denuded somewhere in the neighbourhood (pro- 

 supra-jurassicbeds. baUy to the north ^ wMe th(J disturbance which 



caused this denudation by bringing- the parent rocks from a depositing 

 into a denuding region was apparently quite inoperative at this locality. 

 Though no evidence exists to show that any deposition took place here, 

 corresponding to that of a large part of the immediately post-jurassie 

 rocks, the nummulitic group, and the transitional lower tertiary sand- 

 stones, &c, the post- Jurassic surface appears to have remained flat and 

 submerged in this neighbourhood, till long after it had received the hori- 

 zontal deposits of the upper tertiary Siwalik period. 



The carboniferous beds of the Paniala bluffs skirt a portion of their 



southern base and are cut off to the east by a fault 

 Carboniferous. ., 



obliquely crossing the strike, and bringing these 



rocks into contact with a folded and subsided portion of the overlying 

 Jurassic group. The whole formation dips at an angle of 20° or 30° to 

 the north, the lowest beds being about 100 feet of dark micaceous flags 

 and shales, of which 60 feet were exposed and the rest apparently conceal- 

 ed by talus deposits. In the shaly beds I found fragments of grass-like 

 plants and the casts of a mytiloid shell. These shales are succeeded by 

 about 400 feet of light-coloured and gray dolomitic and other limestone, 

 the latter containing the usual Products, Spirifera, and Terebratulce, 

 with other carboniferous fossils. At the top of the formation the Bel- 

 leropJwn beds are found to occupy their ordinary position. 



Immediately succeeding the carboniferous rocks are the greenish-gray 

 earthy micaceous and partly gypseous clays and 

 sandy beds of the triassic group, some of them 

 having much the aspect and texture of parts of the Siwalik rocks. 



The beds are from 300 to 350 feet in thickness, and in places contain 

 an abundance of Ceratites, some of them large like those near Virgal in 

 the Salt Range (one measured over 9 inches in diameter) . The group, as 

 in other places, is closely united stratigraphically with the underlying 



rocks. 



( 285 ) 



