ANTARCTIC ADVENTURE AND RESEARCH 



length of the Beardmore is about one hundred miles 

 from Mount Hope at the base of Mount Darwin (see 

 Figure 6). Its breadth varies from about eight miles 

 near the bottom to twenty-five miles at the top. On the 

 plateau the Ice Divide, where reached on the four trav- 

 erses so far made by means of these outlet glaciers 

 which cut through the horst, is only a few hundred 

 miles from the coast. Hence most of the ice of the 

 Plateau must escape on the other coasts, i.e. to the 

 west of the horst, and not by way of glaciers like 

 the Beardmore. A very noticeable feature is the gran- 

 ite bar or knob of Mount Hope which lies in the outlet 

 of the glacier and is 2,750 feet high. Its origin is 

 obscure. The slope of the glacier is not very steep, 

 being only seven thousand feet in one hundred miles or 

 seventy feet to the mile. Markedly crevassed areas 

 occur northeast of the Cloudmaker (84° 30') and south- 

 east of Mount Darwin (86° 40'). Wright believes 

 that the velocity of the glacier is less than three feet 

 a day in its most swiftly moving part. Little moraine 

 material is visible on the glacier surface. Only small 

 tributaries are received on the west side, but Keltic and 

 Mill glaciers bring large supplies of ice from the east 

 side near the upper portal. It is of interest that cirques 

 occur in the region north of the Cloudmaker, and some 

 of these, in Wright's opinion, have been overwhelmed 

 by the great glacier. 



The Herbertson Cliff Glacier 



This may be taken as a type of the ''dendritic" 

 tributary glaciers (see Figure 20). It enters ap- 



148 



