68 MALLET, VTNDHYAN SERIES, 



a sloping floor of Kymores, which slope again, (a natural one, not 

 due to elevation or disturbance), owed its origin to the pre-existing 

 bank of crystallines to the north, which, no doubt, formed the limit of 

 deposition."^ 



The following section illustrates the appearance of the Punna 

 shales at Kissengurh near their extinction. 



Kyraore sandstone in thick beds — 



Green shale 



Coarse sandstone 



Green shale 



Sandstone 



Green shale ... ... ... ... 



Sandstone 



Tine silicious sandstone parted by shales 



Red shale 



Fine silicious sandstone and red shale 



Green and red shales ... 



Fine sandstone 



Green and red shales 



and so on, fine silicious irregularly flaggy sandstones alternating 

 with equal quantities of red shale, the whole not exceeding 20 

 feet. 



It is in the Punna shales that the diamond beds occur. There 

 was, however, little opportunity of investigating them owing to their 

 examination having been necessarily taken up early in the season, when 

 the pits are not open, the country not being sufficiently drained to admit 

 of their being worked. In one instance only was the bed seen in place ; 

 this was at Kumerea, south of Adjigm-h, where it is a conglomeritic 

 sandstone made up of pebbles ^ to ^ inch diameter, imbedded in a rather 

 fine matrix which also includes clay galls. The lawer Rewah sandstone 

 here stretches out a considerable distance in front of the scarp, and the 

 pit was just on the northern edge of this terrace, some 20 feet below the 

 summit, and itself about 10 feet deep. On the top of the diamond bed 

 * Mem. Geol. Surv., India, Vol. II, p. 57. 



( 68 ) 



Ft. 



In. 







6 







2 



2 











H 







4 







2 



I 











6 



1 







2 







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