82 



AUSTRALASIAN ANTARCTIC EXPEDITION. 



lenticles or phacoidal masses embedded in a zone of granulitic gneiss. We have, 

 therefore, some reason to believe that the thin dyke channels of relatively hard rock 

 have been rendered discontinuous and irregular in localised areas, in some manner 

 not unlike that pictured in the case of a relatively thin band of soft shale embedded 

 in sandstone at Daylesford. The present lenticular outline of most of the fragments 

 can be ascribed wholly to recrystallisation under stress. 



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Fig. 8. 



DIAGRAMMATIC REPRESENTATION OF THE MANNER IN WHICH THE 

 FOLIATION OP THE GRANODIORITE GNEISS BENDS AROUND AN 

 AMPHIBOLITE INCLUSION, AND THE MANNER IN WHICH THE 

 FOLIATION OF THE AMPHIBOLITE PASSES DIRECTLY THROUGH A 

 QUARTZ FELSPAR GNEISS INCLUSION. 



The manner in which the foliation of the granodiorite gneiss bends around the 

 contour of the enclosed fragments of amphibolite is also a question inviting comment 

 (fig. 8). The same kind of observation has been recorded by Cole, Adams, and others 

 when it has been considered to demonstrate the stream lines of the gneissic flow around 

 the inclusion which has been carried along like a log in a stream.* At Cape Denison 

 the diverted foliation must be considered parallel with the foliation in the gneissic 

 xenoliths embedded in amphibolite. In the latter the foliation of the amphibolite 

 continues straight through the xenolith, sometimes quite irrespective of its angular 

 outline. In the first case a block of amphibolite is embedded in a relatively large mass 

 of granodiorite, and in the second a piece of granitic gneiss is embedded in a relatively 



* Op. oit., p. 74. 



