214 
GEOLOGY OF THE THIRD DISTRICT 
show different degrees in the amount of disturbance, and most of the different forms which 
layers assume when disturbed. They are arranged in that order, which commenced with the 
least degree of disturbance. 
72. 
Section on the feeder of Black river, showing local movement in a portion of a series of thin clay beds or layers, those above 
and below being wholly unaffected by the movement which deranged them. This shows the least amount of disturbance 
of any of the three sections. 
73. 
Section of the same, showing a sharp wrinkle or fold, and a high and graceful arching or folded axis thrown beyond the vertical 
position, exemplifying angular movements. 
