oscillation ripple mark

oscillation ripple mark

[‚äs·ə′lā·shən ′rip·əl ‚märk]
(geology)
A symmetric ripple mark having a sharp, narrow, and relatively straight crest between broadly rounded troughs, formed by the motion of water agitated by oscillatory waves on a sandy base at a depth shallower than wave base. Also known as oscillation ripple; oscillatory ripple mark; wave ripple mark.
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