196 WYNNE : GEOLOGY OP KUTCH. [pART II. 



in places and extending continuously from biise to summit on the 

 south side of the hill (? dykes) . 



Under the north brow a mass of pale purple, amygdaloidal, steatitic, 

 Lava trap outliernorth lava-like rock, one hundred yards in length, rests 

 patch wise upon the Jurassic sandstones at its base; 

 it may be from 10 to 20 feet in thickness, abuts in one place against yellow, 

 soft sandstones, along a line of apparent fault which would just clear the 

 eastern side of the hill, and is in places thickly interlaced with strings 

 of haematite. This rock exactly resembles that found near Ruttria, west 

 of Bhoojj and many similar ones in the sub-nummulitie group. Its mode 

 of occurrence here is somewhat concealed by debris from the hill. 

 Within some large concretions which it contains we find a beautiful pale 

 lavender-grey color. 



Near the southern end of the exposure grey amygdaloid and bands 

 of red sandstone are confusedly associated in a mass, having somewhat 

 the nature of this outlying patch, and some of the decomposed soft 

 ashy trap, found also on the east side of Nunnao,* here seems to 

 conform to an east and west arrangement of the sandstones and is 

 traversed by peculiar silicious seams or veins. 



Just at this spot a reef of red, brecciated rock, resembling fault 

 rock, crossing the upper Jurassic or plant beds at the base of the 

 hill, strikes to the westward by south along a line of white sandstone 

 crags, the southern edge of which is of the same silicious character. 



South of these craggy hills the upper sandstones contain some 



Fossil plants north- dark and pale greyish-purple shales, with black 



west J. unnao. carbonaceous layers, one bed of the shales being 



* It is perhaps possible that these soft, trappean, decomposed-looking rocks were 

 formed by an early eruption from the site of Nunnao, or are remnants of some of the 

 lower trappean flows which may have extended easily to beyond this locality previous to 

 the extrusion of the trap which forms the hill. 



( 196 ) 



