Fig. 13. Kame phase of the drift in Skaneateles Inlet valley. 
368 Frank Carney \ 
j; 
present slope of the marginal terraces and their evenness of front j! 
depend upon the material composing them. When clay is present 
in quantity the terrace is apt to be represented by a series of 
alluvial fan-like ridges, but disproportionately long in direction 
normal to the proper front of the terrace, which from a distance j 
appear as corrugations on the valley wall. When, however, gravel 
is conspicuously present the terrace longer maintains its original j 
form. The most typical illustration on the Moravia quadrangle l| 
of the corrugated slopes which may characterize terraces is seen || 
11 
towards the foot of the valley wall southwest of Moravia. At | 
first sight it might appear that these short ridges and interven- ; 
ing troughs are but the normal result of erosion. A closer study | 
on the ground shows that the clay, so abundant, has assumed 
this form through a long series of slippings, thus illustrating^[the ! 
type of weathering known as solifluction.® 
The normal moraine terrace, as studied in valleys, has been 
J. G. Anderson: Journal of Geology, vol. xiv (1906), pp. 91-1 12. 
