COAST NEAR CAPE ROSS 79 



platform. The granite cliffs here were low, approximately about 50 feet high. We 

 found the edge of the piedmont ice here about a quarter of a mile back from the cliff 

 face. We found a gully,, as seen in the sketch, cut out of the solid granite to a depth 



It seemed of the nature of a huge glacial grove. It trended 



of about 20 to 30 feet. 



3' Course pegmatite 



Hornblende Biotite Cnetss 



r^^^^^^8fe8 



^=r^- 1.-^ Porphyntic dsrh streak 



Fig. 36. GXEISSIC GRANITE AT CAPE KOSS, TWO MILES SOUTH 



OF DEPOT ISLAND 



from about W. by S. or W.S.W. to E. by N. or E.N.E. The gully, although the 

 piedmont had evidently retreated quite recently, had no sign of boulder clay in it, 

 but the bottom of the gully and the rock platform above it on either side was strewn 

 with large erratics, for the most part very much rounded, and suggestive of bottom 

 moraine. The ice of the piedmont at its retreating edge seemed on the whole lairly 



Piedmonc Glacier dboui/Amiie bdo frvm cliff fece 



£rratiCi 



O'ff of gneibSic grdnice 

 dtxxjc SO to mo feet high 



Fig. 37. GLACIER-CUT CHANNEL IN GNEISSIC GRANITE 



Exposed to view through very recent retreat of piedmont, 7 miles south of Depot Island 



free from rock sediment, but was too much concealed under old snow to yield a good 

 section. 



Resting on the top of the gneiss platform, from which the piedmont is now rapidly 

 retreating, were numbers of erratics, and amongst them a large boulder of granite, 

 shown in the sketch below (Fig. 38). 



It exhibits rocks of three difterent ages. First and oldest, a dark greenish-grey 



