KAMEf AND SPlTl, fgg 



village, but the actual boundaries of the granite cannot be laid 



down accurately on the map, as it penetrates as veins and dykes 



far into the neighbouring sedimentary strata, here and there corti- 



t pletely replacing them, where it forms larger 



Locally dioritic. s 



masses. Locally the character of the granite 

 changes entirely, and it appears that diontic masses replace the 

 former. In what exact relation these dioritic outbursts stand to 

 the granite I am at present unable to say, but the rock and its mode 

 of occurrence reminded me strongly of a similar association of granite 

 with dioritic rock near Bhim Tal in Kumaun, already noticed by 

 General Strachey. 1 



Some way up the M3na Gidh, about two miles east of Naga carft- 



Haimantas, east of ping-ground, the quartzites and slates of the 



Na S a - haimantas are seen to form the higher parts of 



the ranges inclosing the valley ; they dip towards south-west against 



the granite mass. 



From the lower heights of the range, which divides the Jaxlhang 

 from the J3dh (Nilang) Gcidh, about three miles north of Naga, a very 

 fine view of the surrounding ranges is obtained. The lower parts of 

 the valley with the spurs of hills is formed of granite, whilst all the 

 higher ranges near, mostly snow-covered, consist of highly contorted 

 strata of the haimantas (see figs. 27 and 28), often twisted into the most 

 intricate folds, but there is a general tendency apparent to dip to west 

 or south-west under most varying angles. The granite penetrates 

 this system in numerous intrusions, sometimes forming a perfect net- 

 work of veins in it. But very little granite is seen north of Rub 

 encamping ground. That this rock must be found higher up the 

 valley is shown by rolled boulders of it which are seen in the river. 



The road to Pulamsumda camping-ground, at the foot of the 



Section to Pulam- ascent to the Tsan S Chok La (P ass )> P a Sses 

 sumda, haimantas. mostly along the strike of the haimantas, and is 



consequently not a very instructive route to take. Nothing is seen 



1 Quart. Jour. Geol. Soc. 1851, VII, p. 298. 



( 199 ) 



