218 AUSTRALASIAN ANTARCTIC EXPEDITION. 



boulder trending across the schistosity. The parallelism of these striae indicate that they 

 were probably received before the rock was plucked out of its in situ position by the 

 onward travel of the glacier. 



PLATE XX. 



Fig. 1. View across the most easterly valley on Cape Denison. Lake V. can be 

 seen on the floor of the valley. 



Fig. 2. View of Lake IV., looking south towards the glacier slopes. Beyond the 

 lake a moraine bar is visible. Still further on the upper limit of the discoloured ice is 

 marked by the upper limit of the white snow. 



Fig. 3. Highly contorted granodiorite gneiss at Cape Denison. 



Fig. 4. Bock surface disturbed by frost action. It occupies a position where the 

 drainage of the thaw water is retarded. 



PLATE XXI. 

 Fig. 1. Jointing in the granodiorite gneiss, Cape Denison. 



Fig. 2. View looking down the glacier slopes towards Lake IV. The moraine bank 

 is more prominent than in Plate XX., fig. 2. The north bank of the lake in the distance 

 can be seen to be thickly covered with morainic material, shown in greater detail in 

 Plate XXIII., fig. 1. 



PLATE XXII. 



Fig. 1. View showing three parallel amphibolite bands at Cape Denison. The 

 place is situated above the 40ft. contour level, and the surface is very rough compared 

 with that in Fig. 2. 



Fig. 2. View illustrating the surface below the 40ft. contour level. Note the 

 smoothed and polished appearance. Two dark basic schlieren can be seen. 



PLATE XXIII. 



Fig. 1. Glacial detritus thickly strewn along the rocky bank of a small glacial lake. 

 Fig. 2. An erratic on the moraine at Cape Denison. 



PLATE XXIV. 



Fig. 1. The Madigan Nunatak from the south-east. 

 Fig. 2. The Madigan Nunatak from the south-west. 



Fig. 3. Cape Gray from the edge of the barrier ice cliffs, looking north-west. The 

 gully-way which divides the island is visible. It is formed by a large metamorphosed 

 basic; dyke. 



