424 
Frank Carney 
t 
sist of shale and sandy layers. Overlying the disturbed zone is 
very compact ground moraine from three to four feet thick. It 
should be stated further that the disturbed beds are underlain by 
a hard sandstone layer over which the stream is now flowing. 
A similar disturbance was seen in a recent stream cut about 
a quarter of a mile northeast of the folds just described. Here 
too it should be noted that the fold is turned against the slope. 
Fig. 25. View in a quarry east of Locke; shows weathered thin bedded strata 
folded by glacial ice. The exposed plane is approximately parallel to the last 
movement of ice. 
Origin of These Folds. In other localities it has been noted 
that freezing and thawing is competent to produce anticlinal dis- 
turbances in sedimentary beds. Under normal conditions folds 
thus produced should be symmetrical and the disturbed beds 
should blend vertical y into more and more residual soil; a gradual 
transition likewise should be noted in the opposite direction; 
