24 GLACIAL REMAINS IN THE NATIONAL PARK, 



but their entire section can be studied where the river has^ 

 cut through any one of these banks. 



These were formed where the glacier halted for an 

 interval during its retreat, from the debris tumbled out 

 of the melting ice. We see them to-day just as the rocks 

 and finer materials fell in a heap off the end of the glacier. 

 Owing to their elevation above the surrounding flats, they 

 are well-drained, and trees, chiefly dwarfed swamp gums,, 

 cover them, giving a rough guide to their whereabouts. 



Probably there existed a small moraine below the place 

 where the glacial remains now appear to end, at the spwc at 

 which the Broad River turns from nqrth-west to north, and 

 drops into a narrow V-shaped water-worn gorge, as lacus- 

 trine clays continue below the last remaining moraine. Once 

 past these glacial fxats, the river drops rapidly, and so 

 has greater cutting power. Perhaps in the future fur- 

 ther traces of glacial moraines will be found on the side 

 of this water-worn valley, but this is doubtful. 



The lowest of the remaining moraines can be clearly 

 distinguished by the belt of trees growing on it. It is 

 not very clearly defined, rising some five feet above the 

 button-grass plain above it, and about twenty feet above 

 the lower flat below. It averages fifty yards in width. 



The next two moraines up the valley in the direction 

 of Lake Webster arc most distinct. The northern one of 

 the pair has two large erratics standing about 50 yards 

 from its north-west corner. These blocks (see PI. XIV., Fig. 

 3) are roughly square, and measure 10 feet by 15 feet, and 

 are resting on the clay beds of the button-grass swamp. 

 From this point upwards nearly to Lake Webster lateral 

 moraines on both sides of the valley can be traced, although 

 they only stand a few feet from the surrounding country, 

 but are marked by many large boulders. Both these moraines 

 rise some 15 feet from the button-grass on the upper side, 

 and about 30 feet on the lower. They both stretch from one 

 side of the valley to the other in a wonderfully straight 

 line. The lower one averages 200 yards in width, while 

 the upper of the pair, which is the best example of a 

 moraine in the Park, is only about 20 yards in width. 



From a spot about 2,000 yards below Lake Webster, and 

 a little distance below the considerable marsh that lies 

 some way below that lake, this country of definite mor- 

 aines, separated by beds of lake-formed clay,, gives place 



