THE METAMORPHIC ROCKS OF ADELIE LAND. 8TILLWELL. 125 



The remaining specimens (Nos. 982, 984) have a finer grain than the preceding, 

 and with a grey colour in addition they resemble, in outward appearance, the granodiorite 

 gneiss of Cape Denison. Further, a slight schistose structure can be detected in the 

 hand specimen. In section andesine, with its refractive index just above basal quartz, 

 has been detected, and this is a strong point of resemblance to the granodiorite gneiss 

 of Cape Denison. There is considerably less allanite and apatite than in the preceding 

 type, No. 983, but pyrite, magnetite, and zircon are present. The mechanical structures 

 are equally prominent, and possibly muscovite is more abundant, and sericite 

 correspondingly less than in No. 983. The presence of andesine makes the rock a 

 granodiorite gneiss rather than a granite gneiss. 



