186 PETROLOGICAL NOTES ON SOME ERRATICS 



There are sporadic areas where epidote is fairly abundant in minute crystals with 

 rather dark colour. 



The " auge " consist mostly of quartz without strain structure and probably 

 recrystallised. The long axes of these " auge " lie parallel to one of the axes of 

 schistosity above mentioned. 



Amongst the quartz there occur large grains and crystals of pyrites in lamellar 

 intergrowth with magnetite. Also large flakes of phlogopite generally associated with 

 these composite grains. 



There are a few rather conspicuous aggregates of secondary sphene and some larger 



flakes of calcite. 



450. Micaceous Sandstone 



Microscopical Char acters. —Consists of angular and subangular grains and 

 flakes of quartz, and also of cherty material with a micaceous cement. There is a 

 well-marked stratification of the constituents. In addition to its presence as a fine- 

 textured scaly cement there are large flakes of mica, both muscovite and biotite. A 

 little ilmenite occurs also. Some of the quartz grains show signs of strain. 



