Abstract
ABSTRACT Longitudinal ripple marks similar in size and appearance to those reported on tidal mudflats developed under the influence of artificial precipitation and overland flow during an experimental study of soil erosion. They appeared to be an upslope extension of the incised channel system, accomplishing the most efficient evacuation of water from the experimental surface. The longitudinal ripples formed under overland flow tended to be more sinuous and to branch more frequently than those formed by tidal currents. In terms of fluid flow dynamics, longitudinal ripples formed under overland flow and tidal flow may be functionally similar, but environmental conditions are quite different. That these features may develop in different environments may introduce some difficulty into interpretat on of such forms found in the geologic record.
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