38 A FUKTHER NOTK ON TIIK TOl'OlIKAl'H V OV LAKK KKNTON, 



of my earlier paper, extending from the shove of the lake 

 a few hundred yards down the hill. 



The point where the overflow from Lake Fenton (which 

 only overflows in flood time) passes under the large boulders 

 probably marks the end of the moraine and its junction with 

 the talus over which it has been deposited. 



Probably much water escapes, through the moraine, 

 as often the creek is running freely at a distance 

 of three-quarters of a mile from the lake when no 

 water is passing the overflow. Also the Lady Barron 

 Creek is steadily cutting into the moraine, and has 

 already cut a considerable groove into the embank- 

 ment. On leaving the lake the stream scarcely 

 drops at all for 50 yards, then in the next 400 yards it drops 

 about 200 feet. This leaves an extremely narrow ridge to 

 be cut through by this very active creek before the lake 

 will be entirely drained. Moreover, this ridge is composed 

 only of loose earth and stones. The Lady Barron Creek 

 will eventually drain Lake Fenton unless it is forestalled 

 by a tributary of the Broad River in the following way. 



As I have explained, Lake Fenton is lying on the south- 

 eastern slope of the Broad River drainage basin. As it lies 

 in a cirque cut into the Broad River basin from the other 

 side of the divide, the lake still drains to the south-east 

 through the watershed, but its north-western end rests 

 merely on the old pre-glacial edge of the hill. This shore 

 is bounded by a low moor, never exceeding 50 feet above 

 the level of the lake. The surface of this moor slopes south- 

 wards towards the lake for about 300 yai-ds back from the 

 shore, then the land dips slowly, for a few yards, and then 

 steeply in a north-westerly direction to the Broad River, 600 

 feet below, and not a mile away. A small tributary of the 

 Broad River drains this moor, and rises within 600 yards 

 of the shore of the lake. 



This moor is littered with glacial debris. No solid rock 

 is to be seen on the surface, and it is doubtful how far 

 below the surface it lies. The tributary of the Broad is 

 annually working its way through this, and capturing more 

 and more of the drainage of Lake P^'entoii. 



It will be a race between the Lady Barron Creek and 

 the Broad River as to which drainage system will drain 

 Lake Fenton, but there is nothing more certain than that 

 the lake will be drained eventually by one of these streams. 

 The Lady Barron Creek has reduced the level of the lake 

 by about 10 feet since the glaciers receded, as lacustrine de- 



