660 GEOLOGICAL NOTES ON KOSCIUSKO, 



is at Pretty Point, about 8 miles from the Thredbo crossing 

 towards Kosciusko. The trend of this Pretty Point fault is 

 about N. 20 W. and S. 20 E., the downthrow being towards 

 E. 20 N. This fault is approximately parallel to the general 

 trend of Digger's Creek on which the new Hospice is now being 

 erected. The probable amount of downthrow of the Pretty 

 Point fault is about 200 feet. 



There is also probable evidence, though more doubtful, of a 

 downthrow fault in the neighbourhood of the usual camping 

 place on Sawpit Creek, at about 3 miles from the Thredbo 

 crossing towards Kosciusko. This faulting is also in a similar 

 direction to the preceding, so that there is distinct evidence in 

 this part of Kosciusko plateau of its having been step-faulted in 

 an E.N.E. direction towards the junction of the Snowy River 

 with the Eucumbene. 



Possibly this step-faulting, combined with the relief found by 

 the earth's crust to the tension from upward warping which 

 culminated in the Thredbo valley, may account for the remark- 

 able direction taken by the Snowy River in the first part of its 

 course. As is shown by the map, it flows first almost due north, 

 inclining gradually to N.N.E., then bends sharply to the east at 

 a spot about 5 miles westerly of the junction of the Thredbo and 

 the Snowy. There can be little doubt that the Kosciusko 

 plateau represents an ancient warped peneplain heavily faulted 

 on its south-eastern margin. 



On the whole we are inclined to believe that although the 

 maximum glaciation of Kosciusko dates back probably 100,000 

 years from the present time, these fault-features may be still 

 older. 



iii. Evidences of Glacial Action. 



These may be grouped as follows : — 



(1) General smoothing of rock-surfaces. 



(2) Roches moutonnees, and grooved and striated rock-surfaces. 



(3) Erratics and perched blocks. 



(4) Terminal and lateral moraines, 



