40 SUB-HIMALAYAN ROCKS OF N. W. INDIA. [CHAP. II 



removal of the entire Krol group is the most noticeable result. Through- 

 out the rest of the section the same comparatively undisturbed stratifi- 

 cation obtains, and this seems to become more marked as we proceed 

 inwards to the higher hills ; the gneiss on the summit of Hatu is almost 

 horizontal. There is another peculiarity worthy of notice and suggestive 

 of connection with those already mentioned. Throughout the whole of 

 this section, although it is the portion of the Lower Himalaya region 



Absence of intrusive wnidl X have most frequently visited, I have 

 roc noticed but one instance of intrusive rock ; it is 



a small trap dyke in mica schist, about three miles from Narkunda, to- 

 wards Muttiani. Within ten miles to the north-west of the Krol, green- 

 stone appears among the uppermost rocks, and rapidly increases in fre- 



Abundance in Krol °i uenc y- Similarly to the south-east, about the lower 

 rocks elsewhere. q— ^ g reen _ s t ne is abundant. Again, due north 



of Simla, in the valley of the Sutlej, where the unaltered Krol and Infra- 

 Krol groups appear deeply set in among the metamorphic rocks, trap 

 rock occurs in great abundance. 



The Simla section serves as a convenient starting point from which 



„,-..•, (.i, cf to trace the connection of the rocks on either side : 

 Rocks to the south-east 



of Simla. j w ^j £ rg j. t a k e U p ^he region immediately to 



the south-east. I have already mentioned the Chor mountain as a very 



remarkable feature. It attains an elevation of 11,982 feet, and is by 



far the highest point so near to the edge of the Lower Himalayas. It 



is also in other respects peculiar : it presents on 

 Chor mountain. 



a small scale a complete example of a phenomenon 



that is more extensively developed elsewhere, and of which a satisfactory 



interpretation is necessary to the general explanation of the mountain 



structure ; I allude to the strange mode of occurrence of great masses of 



granitoid gneiss. The allure of this rock, as judged from local and limited 



