Sea Level Processes and Indicators
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a
b
C
Fig. 5.3 a--c. Ripple marks as wave indicators . a Oscillation ripples. wave length about 5 em , with
Arenico/a fecal strings: tidal flats. North Sea. b Oscillation ripple s, wave length 30 cm. Top of
Sylvania Sea Mount near Bikini Atoll , depth 1500 m , calcareous ooze . c Internal structure of current
ripples, sandy tidal flats. German North Sea Coast. Frame is 22 cm wide. [Photos E. S. a,
H. W. Menard b, H. E. Reineck c]