BY T. W. EDGEWORTH DAVID. 667 



Next, at a period of time many scores of thousands of years 

 removed from the present, possibly 200,000 years ago, Kosciusko 

 was gradually covered by great fields of neve and glacier-ice, and 

 all but the very highest peaks of the Plateau, such as the 

 Nunatakr of the Etheridge .Range, were completely shrouded in 

 the ice-cap. The snow-field moved chiefly in a S.E. direction, 

 pouring its ice over what is now a precipitous escarpment leading 

 down into the Thredbo Valley. It is not yet known whether there 

 was sufficient ice to form a Piedmont glacier in the valley below. 

 Further examination of this valley is much to be desired with a 

 view to gaining information upon this interesting point. During 

 this maximum glaciation even the flats at Boggy Plains and the 

 upper part of Digger's Creek were occupied by ice. The ice-flood 

 gouged out the glacial lakes near new Betas' Camp — Lakes 

 Lendenfeld, Mackie, and Sussmilch. 



There now followed a considerable recession of the ice-sheet; 

 the glaciated surfaces near Lake Albina belong perhaps to this 

 stage. 



Next we find in far more recent geological time, perhaps 

 removed by only 10,000 to 20,000 years from the present, evidence 

 of a fresh and conspicuous glaciation. Lakes Cootapatamba, 

 Albina, Club, the Blue Lake, and Hedley Tarn were formed 

 during this epoch. Even this latest glacial epoch is divided into 

 two, if not more stages. For instance, as shown in our previous 

 paper, there is distinct evidence of a double series of terminal 

 moraines on either side of the main dividing range. As remarked 

 in the previous paper (p. 63), the height of these moraine-embank- 

 ments is from 80 feet up to over 200 feet, and their length, which 

 is between a quarter and half a mile, proved that the pauses of 

 the ice-front at the spots where the moraines became developed 

 must have been of considerable duration. During the long time 

 which elapsed between the recession of the great ice-sheet after 

 it had retired as far up the Snowy Valley as Lake Andrews, and 

 the epoch when the terminal moraines of Hedley Tarn were 

 formed, erosion was taking place in the valley of the Snowy River 

 and its tributaries. The old typical U-shaped valleys became 



