172 W. BLANFORD, WESTERN INDIA. [PaRT II. 



Farther down the stream dykes of felspathic trap, like that of Ma- 

 tapenai hill, intersect the ordinary trap. Ash conglomerates also occur, the 

 pebbles being chiefly trappean, with only a few of granite. Just opposite 

 to Ooehed, also, masses of granite and small dykes of the same rock occur 

 in the trap. The trap passes into a highly crystalline variety, composed of 

 felspar and either augite or hornblend, — it is diflicult to determine which. 



The only explanation which suggests itself for these very unusual 

 -- , . , .,, ,, phenomena is that here, as in one or two other 



Matapenai hul apparently ^ ' 



the core of a volcano. instances noted, the nucleus of one of the great 



volcanoes of the Deccan trap period is exposed. There is clearly a 



great intrusive mass of trap which has carried up the blocks of granite 



with it, and its highly crystalline structure points to slow cooling. The 



occurrence of small veins of granite in the trap is not easily accounted 



for. Some of the blocks of granite may have been fused and injected 



into previously consolidated trap, but it is not easy to understand how so 



acid a rock as granite could co-exist in the fused state with a basic rock 



like dolerite. Where granite blocks are contained in trap, as at Mundlaisur 



and on Matapenai hill, they always appear to have combined with the 



trap on their edges .'^ 



A few small inliers of sandstone occur on the Men river. They are 



mostly of small size and unimportant, and consist 

 Outliers on Men river. , , 



mainly of conglomeritic sandstone. 



Sandstone of cretaceous age, as has already been shown, is wanting 



along the boundary between the traps and metamorphics for a long distance 



west of Panwud, and is not even seen near Mata- 



of SmOTpMc^west of penai hill. It appears close to Wasna on the Hiran 



Panwud. river, and occupies a considerable area south and 



south-west of that place, disappearing to the west beneath the alluvium. 



* The granite veins might possibly be due to aqueous action, but the veins could scarcely 

 from their form have been open cracks, and the source of a rock of the composition of 

 granite is the difficulty. 



( 334 ) 



