100 WYNKE : GEOLOGY OF KUTCU. [PART II. 



in some places reversing the compass needle. Some of the erratics from 

 this trap having much the look of gray syenite suggest the slight 

 possibility of a rock of this kind having furnished the boulder found 

 by Captain Grant in the river near Jam-koonrea, which he describesj 

 however^ as identical with the Parkur syenite. Near the intrusion 

 dark altered shelly bands and traps, intimately associated, occur, having 

 an appearance as if some of the aqueous beds had been melted by 

 contact while the traps were being intruded. The regularity of the lines 

 of bedding and the alternation of the rocks in a place, where intrusion 

 was less prominent, might be taken as evidence of contemporaneity : 

 as it is, some of the finer beds have been, at least, intensely altered 

 in situ ; being in places quite black and splintery, though still retaining 

 traces of fossil plant fragments. 



Commencing to ascend the steep face of Putchum Peer, overlooking 



North side of Put- ^^^ Runn, some coarser beds, — gray calcareous 



chum Peer. bands Weathered yellow or brown, and a calcareous 



breccia with trap and other enclosed fragments, were found, and still 



further up, hard gray calcareous rocks almost limestone interlaced with 



trap dykes, also clayey yellow bands and hard ' pencilly'* shale. The 



dykes here observed were porphyritic with black crystals of augite in 



a dark gray compact augitic base. Succeeding all these rocks are 



purple and gray shales and white sandstone massive gray limestone 



and fine sandstone with a few traces of fossils, purple and greenish 



variegated sandy shales, white sandstones again, and over all the 



set of gritty orange limestones and calcareous beds, thick, thin or 



South side of Putchum flaggy, containing Coriula, Nucula, Trigonice &nA. 



sections of gastropodous shells, which sheets the 



whole mountain on its south side, and extends nearly as far as to Kaora. 



* An expressive term for splintery (' spauly') shale given by Irish workmen to a rock 

 which could be used as slate-pencils. 



( 100 ) 



