Sec. 11.] DETAILED DESCRIPTIONS. 167 



It is probable that the thick trap bed near Ghantol may have formed 

 a dam behind which the conglomeritic and ashy beds accumulated. 

 They thin out apparently both in that direction and to the east^ and 

 only extend over a breadth of two or three miles, such as might easily be 

 the dimensions of an ordinary river valley. 



Trap is seen within the cretaceous beds near Ghantol, but it is 

 Intrusive trap near evidently iutrusivc. It is a massivc crystalline 

 ^^^"*°^" black basalt, very compact, with small crystals of 



felspar. A little further west, a small fault, running north and south with 

 an upthrow to the east, cuts across the little patch of cretaceous beds, here 

 not above half a mile wide, and not far beyond they are covered up by trap. 



Another long narrow patch of cretaceous beds occurs just north-west 



Inlier north-west of ^^ *^^^ ^^^^ described; it has a similar southern dip, 



that last described. ^^^ presents, in many respects, a repetition of the 



same phenomena. The northern boundary extends for about 7 miles in a 



straight line throughout and may be a fault, but clear evidence is wanting. 



The beds are mostly hard sandstones, as usual. Ferruginous lateritic 

 clay is met with as in the Kurro. As in the inlier last described the 

 Fault probably existing conglomeritic sandy limestone occasionally forms 

 between two iniiers. the uppermost beds, especially towards the west, 



so that a fault throwing down the sandstone to the north-west probably 

 intervenes between this and the other patch. Without supposing a fault 

 to exist it is not easy to conceive how the same bed can occur at horizons 

 so different as those of the upper beds of the two patches. 



Supposing the accompanying section (Fig. 16) to represent the 



Fig. 16. c, cretaceous beds : i, traps. 



ground, it is evident that if the beds at a and those at & are the same, 

 a fault must intervene. 



( 329 ) 



