38 
Frank Carney 
the extent of the defacement would depend largely upon the rela- I. 
tive duration of the two bodies of water. ■ 
Probably the most effective agency in the obliteration of these 
shore structures is the deposit of drift made by an ice sheet. With- 
in the belts of thickened drift the burial must be quite complete, t 
the chances of survival being greater with the higher beaches. 
But at all levels the mantle of ground moraine would in any event 
partially cover the weaker expressions of wave and current work. 
And even the pronounced cliffs and terraces might be covered in I 
places. I 
Fig. I, View just north of Dunning’s Landing. Terraces No. 2 and No. 3 show 
here. The steepened slope nearest the lake may represent the lowest terrace 
altered by ice-erosion. 
Furthermore, normal subaerial weathering has tended to render 
less obvious such remnants of these old beaches as have survived | 
the factors above described; the least changed would be the forms 
cut in the more resistant rocks. 
FORMS WHICH SIMULATE WAVE-CUT TERRACES. 
I. Variation in the texture of rocks is manifest in differential 
weathering;^^ sharp slopes simulating cliffs may be thus produced. 
“ T. L. Watson, N. Y. State Mus., yist Ann. Rep., vol. i, p. 1897. 
