68 GLACIOLOGY 



The next object of interest southwards is the Cheetham Ice Tongue, 17 miles 

 south of the southern side of the Drygalski Ice Barrier. 



This small Tongue was about 40 feet in height, and seemed largely formed of 

 snow. At the time it appeared doubtful whether it was a true ice tongue or 

 merely a grounded or frozen in snow-berg. Mawson has shown it on his map as 

 a tongue, and this view has been provisionally adopted. Mawson shows it as being 

 attached to the Davis Glacier. 



At 19 miles south of the Drygalski Barrier is the Davis Glacier proper. It is 

 very heavily crevassed. Its general appearance at its seaward termination, seen at 

 a distance of about 3 miles, is shown on the next sketch. 



Davis Glacier 



heavily emassed. 



Prior Island 



Granite 



C.lrizar 



seai<x. 



Rock ofCneiss'ic Granite 

 (See fblloning sketch). 



Rock 



Fig. 22 



Gneis&ic Grgmte 

 with lighter pegmatitic bands (a) 



Judged from the height of the rock at the left of the sketch, the terminal end of 

 the Davis Glacier may range from 300 to 500 feet above sea-level, possibly more. 



It is improbable that the 

 Section dt ^ height of any point along 



the coast from the Davis 

 Glacier to Cape Irizar, 

 foUowingthe coastal pied- 

 mont, exceeds 1000 feet 

 in altitude. Below is a 

 section of the piedmont 

 ice resting on a rocky 

 point of gneissic grey 

 granite with veins of 

 pegmatite. It will be 

 seen from this that the 

 piedmont glacier ice at 

 the cliff face here is 

 only from 70 to 80 feet thick, and at the top of the cliff about 180 feet above sea- 

 level. The ice at the back rises to a considerably greater height, but probably 

 does not much, if at all, exceed 600 feet, the ascertained height of Cape Irizar. 



Fig. 23 



