•to 



to 



J* 



"to 



to 



to 



to 



2^ 



?5 -to 

 CO "<s> 



r^si "to 



"to r«c 

 *^ 



CO ^ 



so 



to to 

 ~ >-^: 

 » «to 



^2 =o 



to =o 



3 to 



4 a 



"to to 

 5S «* 



P 



* 



be 



c3 



O 

 O 



s 



o 



^ 





o 



■6 

 PI 



the euteetic propor- 

 tions of quartz and 

 orthoclase. For 



quartz and albite 

 Vogt gives euteetic 

 proportions of 25 

 per cent, and 75 per 

 cent, respectively, 

 consequently the 

 presence or absence 

 of albite as perthitic 

 . inclusions ought 

 not greatly to aft'ect 

 the proportions of 

 quartz and felspar. 

 Pegmatites made 

 up of massive 

 felspar (generally 

 flesh - coloured or 

 red) alternating- 

 with smaller masses 

 of quartz, were en- 

 countered in many 

 places. The peg- 

 matite dykes and 

 sills of the Mitikiti 

 district have been 

 already mentioned,, 

 and in fig. 11a plan 

 of one of these as 

 exposed across the 

 floor of the Mitikiti 

 River is depicted. 

 The sill in this case 

 evidently fills an 

 irregular fracture, 

 for the two sides are 

 parallel, and where 

 the gneissic folia- 

 tion is truncated on 

 one side it appears 

 again on the other. 

 Exceedingly 

 coarse-grained peg- 

 matites occur as 

 dykes between 



Chinga and Mount 

 Mushima, and some 

 of these contain 

 moonstone or ania- 

 zonite. In a tribu- 

 tary of the Namieta, 

 masses of flesh- ■ 



