Park. — Glacial Till in Hautapu Valley, Wellington . 



oil 



The Hautapu Valley is divided from the Wangaehu River, which drains 

 the south-east slopes of Ruapehu, by a ridge of hills that rises from 400 ft. 

 to 900 ft. above the Karioi Flat. It is over this divide that the andesitic 

 material has been transported by the ice radiating from Ruapehu. 



There was, it would appear, a differential movement in the Ruapehu 

 glacier, the bottom stream of ice flowing south through the Karioi Basin 

 and thence along the Wangaehu Valley towards the sea, the upper and 

 greater stream flowing south-east across the divide into the Hautapu 



G/a.cial andesitic til/. 



AScjxLe. of cJixxiriyS. 



Fig. 3. — Map showing Distribution of Gl.\cial Till in Hautapu Valley. 



Valley, carrying a load of andesitic debris which it spread over an area of 

 200 or 300 square miles. At all points the till rests on a deeply eroded 

 surface of the marine Pliocene clays, covering hills and hollows alike along 

 the course of the old glacial valley, the direction of which can easily be 

 traced from any high point of view. 



The Rangitikei glacier flowed southward from the Kaimanawa Moun- 

 tains and Ruahine Range, and by its superior mass deflected the Hautapu 



19— Trans. 



