85 
Museum Bulletin No. 25. 
A 
Plate XV. 
A. Current ripple-mark with fine cross ripples developed by waves running 
at right angles to the current, Avon river, below Windsor, N.B. 
B. Current ripple-mark with transverse wave ripple-mark developed further 
than in A, Avon river, below Windsor, N.S. 
C. Current ripple-mark altered to rows of irregular knobs by wave action 
transverse to direction of current, Avon river, below Windsor, 
N.S. 
(Page 30.) 
