166 KHASI HILL3. 



The occurrence of huge blocks of granite in several other places 

 throughout the hills, indicatiug the former exis- 



ETJdence of occurrence , » , . ^ . . 



elsewhere. tence 01 waslungs lor iron ore, points also to the 



existence of this rock in these places. Time, 



however, did not admit of a detailed examination of these localities. I 



have therefore preferred, on the map, to include these within the 



general area occupied by the metamorphic rocks, which are pierced by 



innumerable granite veins, rather than to attempt an amount of detail 



for which I had not sufficient data. Thus, at Nung-rumai, (Normal) 



and at Nungklow, and in some other localities, there is no doubt of the 



existence of granite, but it is probably very limited in area. 



I have already described the occurrence of granite in considerable 



mass and also in veins of varying size and compo- 

 Veins of granite. 



sition, in connection with the metamorphic rocks 



of the Temshung valley to the East of Cherra Poonjee. 



A reference to the map will show that the points at which granite 

 shows through the hills have a somewhat definite 

 gr^itictt.trot!" "' arrangement, and occur on lines having an Eas- 

 terly and Westerly direction. Thus the granite 

 of Lunkoi on the West is continued by the granite of Molim and 

 Nonkrim, and still farther East by that which shows near Pooring and 

 North of Joowai ; while the line of the Kullong is shown further to the 

 East in the exhibition of this lock near to Laidom. 



Greenstone. — This is another interesting form under which igneous 

 rocks are exhibited in the Khasi Hills. 



The most important locality where these rocks occur has been al- 

 ready alluded to in describing the sandstones of 

 Locality, &c. •' ° 



Cherra, and tlie alterations which have resulted 

 from the contact of these volcanic rocks in a molten state. A few words 

 of additional detail will therefore suffice here. The rocks which form the 

 greater portion of the valleys of the Kala-pani and of the Bogarpani, with 



